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
?
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Re: Problem with HP MMS 70000, USERLOCK ON
¿ªÔÆÌåÓýHi have you looked at the service manual ? From:
[email protected]
[mailto:[email protected]]
On Behalf Of Pierre-Fran?ois
(f5bqp_pfm) ? I then decided to open my 70900B, have not done this since many years
when I upgraded the firmware with the latest from my previous 70952B. No virus found in this message. |
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Re: Problem with HP MMS 70000, USERLOCK ON
And I measured the effective retention voltage on the vdd of the TC551001CF-70L memories, it's at 2.864v , the datasheet says it should be at 2v minimum to keep up the data, so definitively it's not a battery problem, probably a faulty memory. Just an assumption.
A memory test would be a good solution to identify if it's such a problem or something else. -- Pierre-Fran?ois, F5BQP JN18AN |
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Re: Problem with HP MMS 70000, USERLOCK ON
I then decided to open my 70900B, have not done this since many years when I upgraded the firmware with the latest from my previous 70952B.
At that time I uploaded this latest firmware on KO4BB web site. So I tested the battery and found 3.074v for a 3v battery, so my problem isn't this. The battery model not replaced by me is a Panasonic BR-2/3A . So the problem seems to be more complex than expected, may be a faulty memory ?? Question: Is there somewhere a memory test that could be run to test the memories of the 70900B memory CPU card? Any suggestion to the person having experience with the 70900B logic ? The problem is just when I load an HP DLP (70875A) within the analyzer I got this problem, otherwise in spectrum analyzer mode the MMS is working fine. pf -- Pierre-Fran?ois, F5BQP JN18AN |
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Re: HP8562A Errors 304,335,317,333
¿ªÔÆÌåÓýSound advice. Thank you very much. Stu ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 22 April 2020 08:47 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333 ? Hello Stu be very carefull if you will recap the psu. It is an old brittle 4 layer board. solder joints does need alot of heat. You can easy ruin the connection to the middle layer. The 3 legged cap is still only a normal capacitor just with an extra leg for support. As I said before put in a 220uF cap and try it out. Do not attempt recapping anything before the problem is solved. You might end up with multiple powersupply failures. Also it is very easy to explode the main Fets in the PSU. so work carefully. Finally I will say recapping is only due if you see spurious signals around the center response. That can only be seen with the alulid mounted over the PSU. ? The 28V is used all over in the RF circuits that is why you see errors. So Stu why don?t you just start with changing the Cap. Use a 220uF 40-50V 105degree capacitor (no china crap) ? best regards Peter ? ? ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Steve, ? Waiting for some ¡°Mate N lock¡± plugs to Test an existing board I have funny config but supplies all relevant circuits (RF) associated with errors I¡¯m seeing. Any ideas on the 3 legged caps? Tants etc. Are standard electrolytic OK to replace. Thinking of doing a PSU refurb as the PSU has allot of these old caps. ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Stephen Hanselman ? I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected.? They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers very much but that¡¯s what the diode configuration would suggest.? I¡¯m not sure what the +28 is used for but it won¡¯t be very much current and C301 being wonky will keep this circuit from working. ? Steve ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back. let me know once you tried best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Have a 2nd PSU to remove and use as Test components. One quick question? ? What type of PSU is this never seen this type of config before! ? ? ? There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty). Is this a voltage doubling circuit , not sure? ? Cheers, Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent. PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU. best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Would Like to say Good news but? ? Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there. ? Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply. ? Can the PSU work standalone, or is it load conscious? ? Stu. ? ? ? ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue. If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz. best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct? Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source. Correct me if I¡¯m wrong. ? I still think something burn¡¯t out although th PSU looks clean. Just prepping up before getting My hands dirty.. ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz. Reason why you can?t measure anything is because the 600Mhz is used for third mixer. best regards PEter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Which board are we talking about ? Still looking for the LED PSU indicators on the A2 card. ? Presume you are referring RF board..? Is this an off the shelf part or HP proprietary? ? Thanks, ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad. I believe Harke has a Hp85629A TAM for sale. best regards Peter Hansen ? Fra: [email protected] <[email protected]> p? vegne af Don Bitters via groups.io <donbitters@...> ? I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A. |
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Re: HP8562A Errors 304,335,317,333
¿ªÔÆÌåÓý
Hello Stu be very carefull if you will recap the psu. It is an old brittle 4 layer board. solder joints does need alot of heat. You can easy ruin the connection to the middle layer. The 3 legged cap is still only a normal capacitor just with an extra leg for
support. As I said before put in a 220uF cap and try it out. Do not attempt recapping anything before the problem is solved. You might end up with multiple powersupply failures. Also it is very easy to explode the main Fets in the PSU. so work carefully.
Finally I will say recapping is only due if you see spurious signals around the center response.
That can only be seen with the alulid mounted over the PSU.
The 28V is used all over in the RF circuits that is why you see errors.
So Stu why don?t you just start with changing the Cap. Use a 220uF 40-50V 105degree capacitor (no china crap)
best regards Peter
Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 22. april 2020 09:30 Til: [email protected] <[email protected]> Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333 ?
Steve, ? Waiting for some ¡°Mate N lock¡± plugs to Test an existing board I have funny config but supplies all relevant circuits (RF) associated with errors I¡¯m seeing. Any ideas on the 3 legged caps? Tants etc. Are standard electrolytic OK to replace. Thinking of doing a PSU refurb as the PSU has allot of these old caps. ? Stu. ? From: [email protected] <[email protected]>
On Behalf Of Stephen Hanselman
Sent: 21 April 2020 17:29 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333 ? I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected.? They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers very much but that¡¯s what the diode configuration would suggest.? I¡¯m not sure what the +28 is used for but it won¡¯t be very much current and C301 being wonky will keep this circuit from working. ? Steve ?
From:
[email protected] <[email protected]>
On Behalf Of Peter Hansen ? hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back. let me know once you tried best regards Peter ?
Fra:
[email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Have a 2nd PSU to remove and use as Test components. One quick question? ? What type of PSU is this never seen this type of config before! ?
? ? There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty). Is this a voltage doubling circuit , not sure? ? Cheers, Stu. ?
From:
[email protected] <[email protected]>
On Behalf Of Peter Hansen ? Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent. PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU. best regards Peter ?
Fra:
[email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Would Like to say Good news but? ? Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there. ? Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply. ? Can the PSU work standalone, or is it load conscious? ? Stu. ? ? ? ?
From:
[email protected] <[email protected]>
On Behalf Of Peter Hansen ? hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue. If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz. best regards Peter ?
Fra:
[email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct? Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source. Correct me if I¡¯m wrong. ? I still think something burn¡¯t out although th PSU looks clean. Just prepping up before getting My hands dirty.. ? Stu. ?
From:
[email protected] <[email protected]>
On Behalf Of Peter Hansen ? Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz. Reason why you can?t measure anything is because the 600Mhz is used for third mixer. best regards PEter ?
Fra:
[email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Which board are we talking about ? Still looking for the LED PSU indicators on the A2 card. ? Presume you are referring RF board..? Is this an off the shelf part or HP proprietary? ? Thanks, ? Stu. ?
From:
[email protected] <[email protected]>
On Behalf Of Peter Hansen ? Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad. I believe Harke has a Hp85629A TAM for sale. best regards Peter Hansen ?
Fra:
[email protected] <[email protected]> p? vegne af Don Bitters via groups.io <donbitters@...> ?
I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
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Re: HP8562A Errors 304,335,317,333
¿ªÔÆÌåÓýSteve, ? Waiting for some ¡°Mate N lock¡± plugs to Test an existing board I have funny config but supplies all relevant circuits (RF) associated with errors I¡¯m seeing. Any ideas on the 3 legged caps? Tants etc. Are standard electrolytic OK to replace. Thinking of doing a PSU refurb as the PSU has allot of these old caps. ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Stephen Hanselman
Sent: 21 April 2020 17:29 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333 ? I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected.? They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers very much but that¡¯s what the diode configuration would suggest.? I¡¯m not sure what the +28 is used for but it won¡¯t be very much current and C301 being wonky will keep this circuit from working. ? Steve ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back. let me know once you tried best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Have a 2nd PSU to remove and use as Test components. One quick question? ? What type of PSU is this never seen this type of config before! ? ? ? There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty). Is this a voltage doubling circuit , not sure? ? Cheers, Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent. PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU. best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Would Like to say Good news but? ? Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there. ? Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply. ? Can the PSU work standalone, or is it load conscious? ? Stu. ? ? ? ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue. If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz. best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct? Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source. Correct me if I¡¯m wrong. ? I still think something burn¡¯t out although th PSU looks clean. Just prepping up before getting My hands dirty.. ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz. Reason why you can?t measure anything is because the 600Mhz is used for third mixer. best regards PEter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Which board are we talking about ? Still looking for the LED PSU indicators on the A2 card. ? Presume you are referring RF board..? Is this an off the shelf part or HP proprietary? ? Thanks, ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad. I believe Harke has a Hp85629A TAM for sale. best regards Peter Hansen ? Fra: [email protected] <[email protected]> p? vegne af Don Bitters via groups.io <donbitters@...> ? I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A. |
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Re: new File called App notes
On Mon, 20 Apr 2020 at 13:45, David C. Partridge <david.partridge@...> wrote: In fact I'd go so far as to say that in some cases manufacturers take active design steps to make things non-repairable.? :( At least some of it is a result of taking active design steps to hinder counterfeiting.? Dave.? -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom |
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Re: Problem with HP MMS 70000, USERLOCK ON
¿ªÔÆÌåÓýHi JF & the Gang,After reloading a fresh DLP NF 70875A from my original ROM personality module I got the same error ERR 2001 and entered once again into the USERLOCK ON dead lock. I was again obliged to send the USERLOCK OFF over the HPIB bus and the analyzer function started to work fine back after a CAL ALL . So I suspect a battery out of gas within the 70900B (but not sure ...), could someone let me know the type of battery I will have to purchase ? Thanks 73's Pierre-Fran?ois, F5BQP Le 21/04/2020 ¨¤ 13:53, Pierre-Fran?ois
(f5bqp_pfm) a ¨¦crit?:
Thank you JF, will keep you informed . --
Pierre-Fran?ois, F5BQP JN18AN |
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Re: Maximum depth of HP rack mountable gear?
FWIW, here's my experience and method of cutting a rack down to size. Same problem, it was too deep for the available space.
When setting up new racks, I usually make a base too, with fixed wheels at the back, swivel castors at the front, and the base extending forward about 10 to 13 cm with big screw-down bolts to take the weight off the castor wheels, plus act as anti-tilt bars. http://everist.org/NobLog/20130924_rack_roller_base.htm |
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Re: Do ManualsPlus still exist
The loss of ManualsPlus and the other physical archives, was a disaster. Few realize the magnitude.
Some links and photos here: As for 'scanned eventually' - ha. No, it's lost. Most scans are atrocious quality, and part of that is due to the intrinsic crappiness of PDF.? Eventually every single 'scan' currently online, will have to be redone, once we have an acceptable file format and tools. But by then, most of the paper originals will be gone. |
Paul Bicknell
Pierre-Fran?ois (f5bqp_pfm)
Dr. David Kirkby, Kirkby Microwave Ltd
Guy Dunphy