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CHECK OUT THE WIKI The purpose of the wiki is mainly to allow you to find information on instruments, either from either
- The model number
- The function(s) listed below. Some instruments have multiple functions - for example, the 4195A is a VNA, spectrum analyzer and an impedance analyzer. Therefore the 4195A is listed in multiple categories
Please also check out HPWiki available here:
- Accessory kits - various types
- AC power analyzers - PA2201A and PA2203A
- AC power supplies 6811C, 6812C, 6813C
- Airlines
- Arbitrary waveform generators M8194A
- Amplifiers?493A, 495A?
- Attenuators (optical) 8156A, 8157A, 8158B, 81566A, 81576A,?
- Attenuators (RF) 8494A
- Attenuator set (500 ¦¸) 350C
- Attenuator set (600 ¦¸) 350D
- Attenuator switch driver
- Audio analyzers? 8903A, 8903B, 8903E,? ?
- Base station test sets
- Bit error rate testers (BERTs)
- Cables
- Capacitance meters U1701A, U1701B, 4272A, 4278A, 4279A
- Capacitor Bridge 4270A,
- Capacitor standards 16380A, 16380C,?
- Carrier noise test setsi
- Cesium frequency standards
- Clamp ammeters
- Close field probes
- Crystal Impedance E4915A, E4916A
- Data Acquisition Systems (DAQs)
- DC power analyzers
- DC power supplies 6030A , 6031A , 6032A, 6033A, 6035A, 6131C, 6621A, 6622A, 6623A, 6624A, 6627A, 6255A, 6645A, 6671A, 6672A, 6673A, 6674A, 6675A, 62003A, 62003C, 62003E, 62004A, 62004B, 62004E, 62005A, 62005B, 62005E, 62006A, 62006B, 62006E, 62010A, 62010C, 62010E, 62012A, 62012C, 62012E, 62015A, 62015C, 62015E, 62018A, 62018C, 62018E, 62024A, 62024C, 62024E, 62028A, 62028C, 62028E, 62048A, 62048C, 62048E
- Delay lines
- Detectors
- Device current waveform analyzers
- Digital communications analyzers
- Directional couplers
- Distortion analyzers 330B, 330C, 330D, 331A, 332A, 333A, 334A, 339A, 8903A, 8903B, 8903E,???
- Dynamic measurement DC source
- Electrometers
- Fading simulators
- Femto ammeters
- Filters
- Frequency counters 522B, 5342A 5343A 5352B
- Frequency standards?
- Function Generators ? 3310A,? 8165A,
- GPIB controllers, extenders, cables etc.
- GPS frequency standards
- Harmonic mixers
- High resistance meters 4339B
- High resistance meter fixtures 16008B
- HEV EV Grid Emulators and Test Systems
- In-circuit test systems
- Impedance analyzers 4195A, 4291A, 4291B, 4395A, 4396A, 4396B, 4294A, E4990A, E4991A
- Impedance Analyzer Accessories
- Impedance / Gain Phase analyzer 4194A
- Impedance Meter 4193A,
- Isolators
- LCR meters? U1701A, U1701B, U1731A,? U1731B, U1731C, U1732A, U1732B, U1732C, U1733C, 4191A , 4192A, 4194A, 4195A, E4196A,? 4216A, 4260A, 4261A, 4262A? 4263A, 4263B, 4271B, 4274A, 4275A, 4276A , 4277A, 4284A, 4285A, 4286A, 4287A, 4291A, 4291B, 4294A, 4332A, 4342A, 4395A, 4396A, 4396B, E4980A and E4980AL
- LCR meter calibration devices? 16380A 42030A? 42090A, 42091A and 42100A
- LCR meter accessories
- 2-Terminal BNCs.
- 4-Terminal Pair (BNC connectors)
- Cable extension 16048A, 16048D, 16048E, 16048G, 16048H
- DC current bias accessories 42841A, 42842A, 42842B, 42842C, 42843A
- DC voltage bias accessories 16065A, 16065C,
- Kelvin clips 16089A, 16089B, 16089C,16089E
- Lead Components 16047A,16047B, 16047D, 16047E
- Material 16451B, 16452A
- Probes 42941A
- SMD 16034E, 16034G, 16034H
- 2-port 16096A
- 7 mm (APC7)
- 2-Terminal BNCs.
- LCZ meters? 4276A, 4277A,
- Lightwave clock / data receivers
- Lightwave converter
- Lightwave component analyzer
- Lightwave measurement system mainframes
- Lightwave polarization analyzers 8509B
- Logic analyzers
- Nemo wireless network solutions.
- Noise and interference test set
- Noise figure analyzers
- Noise sources 346A, 346B. 346C ,
- Matching pads (50 ohm to 75 ohm or similar)
- Materials test equipment
- Microwave repeaters
- Microwave downconverters 70427A
- Microwave / THz sources
- Milliammeter 428B
- Milliohm meter
- Mobile communications DC source
- Modular instruments
- AXIe
- Data acquisition (DAQ)
- USB
- PXIe
- Modulation analyzers
- Multimeters 427A, 970A
- Optical attenuators
- Optical heads
- Optical sources
- Optical spectrum analyzers
- Oscilloscopes 120A, 120AR, 120B, 122A, 130A, 130B, 130BR, 130C, 140A, 140B, 141A, 150A, 150AR, 160B, 180A, 180AR, 180CD, 181A, 181AR, 181T, 181TR, 182C, 182T, 183A, 183B, 184A, 184B, 185A, 185B, 1200A, 1200B, 1220A, 1221A, 1703A, 1707A, 1707B, 1710A, 1710B, 1715A, 1722A, 1725A, 1726A, 1740A, 1741A, 1742A, 1743A, 1744A, 1746A, 1980A, 1980B, 5403A, 6000A, 6000L, 16533A, 16534A, 54100A, 5410B, 54100C, 5100D, 54111D, 54120A, 54120B, 54200A, 54501A, 54502A, 54503A, 54504A, 54520A, 54520C, 54540A, 54540C, 54542A, 54542C, 54600B, 54601A, 54601B, 54602B, 54603B,? 54645A, 54654N, 54710A, 54720A, 54750A, 54825N, E1428,?
- Oven controlled crystal oscillators (OCXOs)
- Pattern generators
- PCM terminal test set
- Phase noise measurement
- Pico ammeters
- Printers 2225
- Plotters 7470A, 7475A?
- Probes
- Protocol analyzers and exercisers.
- Power booster test sets
- Power meters 431A, 431B, 431C, 432A, 435A, 435B, 437B, 438A
- Power splitters
- Power supplies
- Pulse generators
- Q-meters 4342A?
- Q-meter calibration inductors 16470A
- Reflection transmission test set
- Return loss module (optical)
- Relays / switches / switch matrices (optical)
- Relays / switches / switch matrices (RF)
- Resistor standards 42030A?and 42100A
- S-parameter test sets
- Scalar network analyzers
- SCSI bus preprocessor interface E2324A
- Selective level meters 3746A
- Semiconductors
- Semiconductor parameter analyzers 4145A, 4155B, 4156B,
- Signal analyzers
- Signal generators / sweep generators / signal sources / oscillators 200CD, 201B, 209A, 204D,? 608A,? 8165A
- Software
- Source measure units
- Spectrum analyzers 4195A,???
- Switch control units
- SWR meter 415E?
- Time interval? counters
- Time mark generator 226A
- Timing and data state modules
- Torque wrenches
- Transmitter testers
- Trigger modules
- Ultrasound transducers
- Universal bridge? 4260A, 4265A, 4265B?
- Vacuum tube voltmeter 410C
- Vector Impedance Meter 4193A, 4800A, 4815A
- Vector Network Analyzers (VNAs) 4195A,? 8510A, 8510B, 8510C, 8753A, 8753B, 8753C, 8753D, 8753E, 8753ES, 8752ET, 8719A, 8719B, 8719C, 8719D, 8720A, 8720B, 8720C, 8720D, 8720ES, 8722A, 8722B, 8722C, 8722D, 8722ES,
- Vector Network Analyzers (VNA) calibration kits 85032B, 85032E, 85033C, 85033D, 85033E, 85050B, 85050C, 85050D, 85052B, 85052C, 85052D, 85054A, 85054B, 85054D, 85056A
- Vector Network Analyzer (VNA) verification kits
- Vector Signal Analyzer 89650S, 89600S
- Vector voltmeters 8405A, 8508A,
- VXI mainframes 70000B, 70000C
- Waveform and function generators
- Waveguide to waveguide and waveguide to coaxial transitions.
- Wireless 58 OTA chambers
- Wireless channel emulators
- Wireless network emulators
- Wireless communication test sets
?
Re: X-Y to VGA/USB converter
Perhaps another approach might be easier. Use a PC and an A/D
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input device. You could create an application that read 2 analog inputs and displayed them in an X/Y manner in a window. You would not have to worry about screen resolution. The trick is finding an A/D input device with at least 2 input channels. I was thinking an audio input device but I don't think that they handle DC. Pete. ----- Original Message -----
From: "Kuba Ober" <ober.14@...> To: <hp_agilent_equipment@...> Sent: Thursday, September 01, 2011 10:17 AM Subject: Re: [hp_agilent_equipment] X-Y to VGA/USB converter Further thoughts: Now I think that the resolution will have to be adjustable to fit to popular |
Re: X-Y to VGA/USB converter
These are available, I think this was discussed before.
Xtof On 01/09/11 16:08, Kuba Ober wrote:
Disclaimer: |
Re: X-Y to VGA/USB converter
Further thoughts: Now I think that the resolution will have to be adjustable to fit to popular
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widescreen LCD monitors. A 1024x768 output does not look too good when horizontally stretched. I think the output will have to be matchable to common LCD aspect ratios, so even if vertically it's 768, horizontally it may need to be more than that. I think that the device should read the DDC information from the monitor and use it for initial setting. I think that having a DVI output would also be nice, since supposedly analog inputs on monitors are going the way of the dodo. DVI shouldn't be an issue since memory bandwidths to a DAC and to the DVI are obviously same. Cheers, Kuba On Sep 1, 2011, at 10:08 AM, Kuba Ober wrote:
I'm thinking of biting the bullet and making an affordable X-Y-(Z) to VGA/USB converter for use with various instruments where existing X-Y displays are dying. |
X-Y to VGA/USB converter
I'm thinking of biting the bullet and making an affordable X-Y-(Z) to VGA/USB converter for use with various instruments where existing X-Y displays are dying.
I'm looking for input about the required specs and functionality: 1. Bandwidth 2. Input voltage ranges 3. Required accuracy on voltage-to-coordinate transformation 4. Requirements for sequence triggers to change colors: for example, if a display draws some nomenclature, and then goes on to draw traces, it'd be good to have a way of setting it up to switch colors automatically on certain events (X,Y in a certain area, retrace on X, etc). 5. Other inputs needed for interfacing with particular instruments 6. Resolution: I'm thinking it'd be a 1024x768 24bit framebuffer 7. Persistence adjustments: how many rectangular areas should there be (upper limit), each with its own persistence value. I'm also wondering if there are any spectrum analyzers where display accuracy would benefit from taking some IF frequency/ies as the X coordinate instead of a voltage. Counting frequency is easy. For my 7L14 I was thinking of using both IFs as the inputs; that would improve the accuracy of the display and would make it fixed-frequency. I don't have any HP SAs or other instruments like that, all I have is a 7L14 spec an. I'd try to make it as low cost as possible of course, but specs come first. Cheers, Kuba Ober |
Re: Which HP spectrum analzyer is structurally most similar to that of HP 8565A?
I think that following basic rules is enough: fully shielded enclosure, cable/connector
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shields terminated over 360 degrees to the case (NOT the PCB!!, google Pin 1 Problem), common mode chokes on all connections, ground plane on the component side of the PCB. Using a linear regulator for the CPU's voltage(s) would help too, otherwise you have to deal with CPU harmonics, USB harmonics, and regulator's that will likely mix with everything else. That should cover a lot of issues already methinks. Cheers, Kuba On Aug 27, 2011, at 12:52 AM, Jim Cotton wrote:
|
Re: Problems with HP8753C networkanalyzer
Hi there Jose thanks for your mail. I tried to read your nice presentation and did some tests. I can do Cal 44 cal 45 and they pass that. but when I do Cal 48 it fails. And actually the failure got worse. I tried to work open loop to se the offset and I se a HUGE offset. setting to 300khz we should se something from 1.3-6Mhz I get 165Mhz there and going to 30Mhz give me 190Mhz and 40Mhz over 200Mhz. So what would you suggest me to do. 73 Peter
To: hp_agilent_equipment@... From: eb5agv@... Date: Wed, 31 Aug 2011 10:00:35 +0200 Subject: Re: [hp_agilent_equipment] Problems with HP8753C networkanalyzer Hi Peter, I went through a similar problem (not exactly the same, but the error was the same) and was able to fix it by an internal source auto-calibration. Please, check my WEB at for more information about what I did and the results. If you have any doubt, just ask :-) I hope it helps! Regards, JOSE At 09:54 31/08/2011, you wrote: hi group I have a HP8753C analyzer option 6 (6Ghz) that has a HP85047 testset. I get the following error when power on. No IF found check R input levelPhase lock lost when I se my display I have not strait line under 90Mhz. There is like noise on the line there. I did some tests in CW mode and se I loose my phase lock going under 87Mhz. Looking on the Cw signal with a spectrumanalyzer I se a very unstable signal. So when going below 87Mhz the display say Phase-lock lost. Going above make a stable frequency signal. Measurering the power out of the source (level set to 0dBm out say around -11dBm but that is after a loss of 6dB in a powersplitter (hp11667). so output od source is around -5dBm measured at 1Ghz. Level is flat over the range. What can be the root course for that problem. Best regards Peter Hansen OZ1LPR -- 73 EB5AGV - JOSE V. GAVILA - IM99sm La Canyada - Valencia(SPAIN) Radio and Test Equipment....... RadioRepair BLOG............... |
8648C Sig Gen 1E5 Option
Does anyone know details or availability of the 1E5 high stability timebase option for the HP 8648C 3.2 GHz signal generator?
I have an 8648C without this option and would consider adding the option if it can be found or substituted. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos Ku
Stuart,
Sorry, forgot to tell you. I am also an design engineer working in an R&D company. On my job, I need to develop all level of electronics. I would like to have some decent equipment that I can do some measurements. I do not want to always wait until I come to work everyday. I want to be able to do some at the leisure of my home. On top of my job, I am also an ambitious hobbyist who wishes to build and test things at home. I think spectrum analyzer is a good tool to have. Yes, you are right. I do not need to have it. However, I just came across a broken one on ebay and I thought getting one may help me to do more interesting research of my own and help to boost my growth in my job related knowledge. Everyone has different needs and some are satisfied with low end equipment. Some may be a little ambitious and want to always go a little further than most other people. Amos ________________________________ From: "stuartl73@..." <stuartl73@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 2:31 PM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... ? Amos, in all honesty I don't know why you want a spectrum analyzer. They do two things; measure frequency (to some accuracy up to and including frequency counter resolution) and measure RF power or voltage, across a known low return loss impedance, again to some accuracy depending on the age and cost of the analyzer. In all but the newest and most expensive analyzers, time is not displayed against frequency and amplitude. You now state that you are willing to give up the ability to accurately measure the signal level. You might as well buy an inexpensive frequency counter and RF power meter. That costs less and takes up a lot less bench space .For my needs, I would rather have my Spectrum Analyzer. Stuart K6YAZ Los Angeles, California -----Original Message----- From: Amos Ku <amosku@...> To: hp_agilent_equipment <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 1:12 pm Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Stuart, I think before I can afford that attenuator, probably I may just calculate the loss and attenuation and buy appropriate attenuators when they are needed each time... Amos ________________________________ From: "stuartl73@..." <stuartl73@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 12:08 PM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos, what you are dealing with is an attenuator specifically made for that one instrument. They are in short supply and are crucial for the analyzer to work properly and to display the actual input level on both the screen and readout LED. Anything but the proper part will degrade the instrument, and possibly create a "Frankenstein's monster", with outboard "fixes". I hope you realize that you are involved in a possibly very expensive and time consuming project; and may have to settle for "good enough" rather than a 100% reliable, accurate instrument. Stuart -----Original Message----- From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 11:24 am Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Will, Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos, in all honesty I don't know why you want a spectrum analyzer. They do two things; measure frequency (to some accuracy up to and including frequency counter resolution) and measure RF power or voltage, across a known low return loss impedance, again to some accuracy depending on the age and cost of the analyzer. In all but the newest and most expensive analyzers, time is not displayed against frequency and amplitude.
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Show quoted text
You now state that you are willing to give up the ability to accurately measure the signal level. You might as well buy an inexpensive frequency counter and RF power meter. That costs less and takes up a lot less bench space .For my needs, I would rather have my Spectrum Analyzer. Stuart K6YAZ Los Angeles, California -----Original Message-----
From: Amos Ku <amosku@...> To: hp_agilent_equipment <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 1:12 pm Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Stuart, I think before I can afford that attenuator, probably I may just calculate the loss and attenuation and buy appropriate attenuators when they are needed each time... Amos ________________________________ From: "stuartl73@..." <stuartl73@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 12:08 PM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos, what you are dealing with is an attenuator specifically made for that one instrument. They are in short supply and are crucial for the analyzer to work properly and to display the actual input level on both the screen and readout LED. Anything but the proper part will degrade the instrument, and possibly create a "Frankenstein's monster", with outboard "fixes". I hope you realize that you are involved in a possibly very expensive and time consuming project; and may have to settle for "good enough" rather than a 100% reliable, accurate instrument. Stuart -----Original Message----- From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 11:24 am Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Will, Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos Ku
Stuart,
I think before I can afford that attenuator, probably I may just calculate the loss and attenuation and buy appropriate attenuators when they are needed each time... Amos ________________________________ From: "stuartl73@..." <stuartl73@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 12:08 PM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... ? Amos, what you are dealing with is an attenuator specifically made for that one instrument. They are in short supply and are crucial for the analyzer to work properly and to display the actual input level on both the screen and readout LED. Anything but the proper part will degrade the instrument, and possibly create a "Frankenstein's monster", with outboard "fixes". I hope you realize that you are involved in a possibly very expensive and time consuming project; and may have to settle for "good enough" rather than a 100% reliable, accurate instrument. Stuart -----Original Message----- From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 11:24 am Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Will, Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos; You may learn a lot by working on this project, but the knowledge and results may not be what you expected. I've had to abandon similar projects when I replaced one suspect part only to find out there was another problem revealed by the replacement. When you get to the point where a part or assembly isn't available at a reasonable price, or time-frame, where do you go?
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The 8656A represents the state of the art, at that time, and relies on a lot of specialized components working reliably together. HP had a real advantage because they designed and built a unique RF attenuator. They were so good that many were sold to other companies to use in their products. My Gigatronics model 600 signal generator (10 to 8000 MHz) uses a special HP programmable attenuator, and is a major factor in it's success. Stuart K6YAZ Los Angeles, California -----Original Message-----
From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 12:36 pm Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Stuart, Good reasoning. This is my dilemma: 1. To get the system up and working by any condition, 2. Or spend more money to get the complete system. Unless I can run into someone sells cheap on ebay, I may have to get stuck with this attenuator if I am choosing option 2. Amos ________________________________ From: "stuartl73@..." <stuartl73@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 12:08 PM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos, what you are dealing with is an attenuator specifically made for that one instrument. They are in short supply and are crucial for the analyzer to work properly and to display the actual input level on both the screen and readout LED. Anything but the proper part will degrade the instrument, and possibly create a "Frankenstein's monster", with outboard "fixes". I hope you realize that you are involved in a possibly very expensive and time consuming project; and may have to settle for "good enough" rather than a 100% reliable, accurate instrument. Stuart -----Original Message----- From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 11:24 am Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Will, Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
Re: Favorite bad capacitor debugging techniques?
J. Forster
Most people sdon't use a real (GR or HP) to measure ESR.
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-John ================= Fred, after your message, I got to thinking about my previous measurements (of that replacement capacitor). My ESR readings looked *way* too low, so |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos Ku
Stuart,
Good reasoning. This is my dilemma: 1. To get the system up and working by any condition, 2. Or spend more money to get the complete system. Unless I can run into someone sells cheap on ebay, I may have to get stuck with this attenuator if I am choosing option 2. Amos ________________________________ From: "stuartl73@..." <stuartl73@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 12:08 PM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... ? Amos, what you are dealing with is an attenuator specifically made for that one instrument. They are in short supply and are crucial for the analyzer to work properly and to display the actual input level on both the screen and readout LED. Anything but the proper part will degrade the instrument, and possibly create a "Frankenstein's monster", with outboard "fixes". I hope you realize that you are involved in a possibly very expensive and time consuming project; and may have to settle for "good enough" rather than a 100% reliable, accurate instrument. Stuart -----Original Message----- From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 11:24 am Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Will, Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos, what you are dealing with is an attenuator specifically made for that one instrument. They are in short supply and are crucial for the analyzer to work properly and to display the actual input level on both the screen and readout LED.
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Anything but the proper part will degrade the instrument, and possibly create a "Frankenstein's monster", with outboard "fixes". I hope you realize that you are involved in a possibly very expensive and time consuming project; and may have to settle for "good enough" rather than a 100% reliable, accurate instrument. Stuart -----Original Message-----
From: Amos Ku <amosku@...> To: hp_agilent_equipment@... <hp_agilent_equipment@...> Sent: Wed, Aug 31, 2011 11:24 am Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Will, Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] |
Re: Replacement for 08565-60084 attenuator in HP 8565A...
Amos Ku
Will,
Yeah. I have thought about this option too. But that means I have to give up the ability to internally choose attenuation. Right now, I am facing the issue of choosing the cable that go between the RF connector and the coax switch (K2). No experience on choosing or specifying one before..... Amos ________________________________ From: "w0eom@..." <w0eom@...> To: hp_agilent_equipment@... Sent: Wednesday, August 31, 2011 8:50 AM Subject: Re: [hp_agilent_equipment] Replacement for 08565-60084 attenuator in HP 8565A... ? Amos - you can use an external atten. to keep the input signal below +20 dbm. Will In a message dated 8/31/2011 1:06:30 A.M. Pacific Daylight Time, amosku@... writes: Hi all, With help from friends in this group, I have found the schematics in the manual, and I also identified the five missing parts in the HP 8565A that I cheaply bought from ebay. Now, I found it difficult to find a cheap source for 08565-60084 attenuator. Does any one know the replacement part for 08565-60084 (A34, RF attenuator) in HP 8565A? It does not seem to be easy to obtain this attenuator ($400). I wonder if anyone knows any information about this attenuator. If obtaining one is difficult, what options do I have? Also, I wonder if this attenuator is really needed to make the system work. Thanks in advance. Amos [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
Re: Favorite bad capacitor debugging techniques?
You are right.
I have seen caps that lost allmost all capacitance with perfect ESR, i have seen caps that leaked over 15 mA at 350V, blew out a lot of dielectrium but still perfect ESR. I have seen caps with good capacitance, no leakage but bad ESR. I have seen a cap with a internal ripped or broken conductor. That lookes like severe dielectric absorbsion. ( is that called soakage ?) capacitance not possible to measure because you could not unload the cap. It gave 100 V on the voltmeter and even if you short it, no effect. I use a ESR meter just for fun, i like to examine components. In switchers I use it to test caps, not to find a problem. I used to do that but not any more. I measure with scope and DMM and as a result of that I most times find the problem. After I find it, and it is a cap I use the ESR meter, C meter and test DC leakage to be sure and for fun. Fred PA4TIM Op 31 aug. 2011 om 19:58 heeft "J. Forster" <jfor@...> het volgende geschreven: If a capacitor is pulling a bus down, an ESR meter is really not the right [Non-text portions of this message have been removed] |
Re: Favorite bad capacitor debugging techniques?
J. Forster
If a capacitor is pulling a bus down, an ESR meter is really not the right
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tool. A short and a good cap both have a low ESR! -John ===============
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Re: Favorite bad capacitor debugging techniques?
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----- Original Message -----
From: "Pa4tim" <fredschneider@...> To: <hp_agilent_equipment@...> Sent: Wednesday, August 31, 2011 10:26 AM Subject: Re: [hp_agilent_equipment] Favorite bad capacitor debugging techniques? What model ESR meter you use ? I guess a HP bridgde. With 6.5 digits this is not one of the ESR "indicator" kits. How low can you measure. I use an analog meter, it goes upto 40 ohm ( but I made it non lineair for better resolution under 1 ohm, and accurate down to 100nF. But I think I change this and make it switchable between 1 ohm full scale and 40 ohm. ( not that this is important because if the meter corners it is good, the last cm on the scale is 1 Ohm so about 50 mOhm resolution) Fred PA4TIM FWIW, I usually check caps on a GR-1650-A but often leakage is important and is not measured by the usual impedance bridge. My usual arrangement is to use a small, regulated DC power supply and a meter capable of indicating quite low values of current. My Tektronix DMM goes low enough. I've found paper caps that test good on the bridge but have excessive leakage and won't work in some circuits. Leakage is a primary test for electrolytics. There _are_ capacitance bridges like the GR 1617-A that will also measure leakage and supply a variable bias internally but I don't have one. A megohmeter will also do provided you have one which will run at voltages suitable for the caps. -- Richard Knoppow Los Angeles WB6KBL dickburk@... |
Re: Favorite bad capacitor debugging techniques?
What model ESR meter you use ? I guess a HP bridgde. With 6.5 digits this is not one of the ESR "indicator" kits. How low can you measure.
I use an analog meter, it goes upto 40 ohm ( but I made it non lineair for better resolution under 1 ohm, and accurate down to 100nF. But I think I change this and make it switchable between 1 ohm full scale and 40 ohm. ( not that this is important because if the meter corners it is good, the last cm on the scale is 1 Ohm so about 50 mOhm resolution) Fred PA4TIM Op 31 aug. 2011 om 18:40 heeft "tcxo" <tcxoe@...> het volgende geschreven: I typically end-up disconnecting each high-value aluminum electrolytic capacitor in order to test it. [Non-text portions of this message have been removed] |
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