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1 mw - 0dbm lab calibration 68
Hi all Regarding 1 mw lab calibration I am looking for comparisons between the old and trusted HP 432A the replacement N 432A and the Tegam 1830A and I was wondering if anyone hear Can give any feedback on the Tegam 1830A compared to the new N 432A Also is there a report comparing the 3 meters Regards Paul
Started by Paul Bicknell @ · Most recent @
HP/Agilent/Keysight VEE (OT?) 16
Hi Group. Not much found here (Groups.io) on this topic. Found a VEE 'program' that calibrates my E5071B ENA. I might have some issues/questions about it. Any other VEE users out there? Thanks in advance! Mark
Started by Mark Bielman @ · Most recent @
A homemade diode power sensor for HP meters 113
Hi guys, as you all know, the HP 435A, 436A, 437A and so on are quite nice power meters and the meter itself is availabe at quite low prices. However, the power sensors are quite expensive. I own a 8481A and a 8484A, both in nice and working condition, but I don't want to damage anything so I treat them like raw eggs and handle them extremely careful. So I always thought whether it would be possible to make a own diode power sensor which is compatible to the HP 436A. This would have the advantage that the 436A could be used (and therefore its HPIB capabilities), and if it works with the 436A, it will do so also with the other meters (and possibly others, I don't know). Further, the homebrew power sensor would be cheap and if it breaks, no matter, it can be repaired easily. So today I spent a few hours on making my own power sensor. I checked the schematic of the 8481A power sensor, and I did basically the very same. I came up with this schematic: (I don't want to waste valueable web space for the group, so I uploaded the high resolution pictures to my webspace) https://hb9fsx.ch/wordpress/wp-content/uploads/2018/11/20181117_173101.jpg The letters on the right side are the connector pins for the HP 436A, of course. Then I made a quick 'dead bug' style prototype, as follows.... (please don't laugh at me :-) ). https://hb9fsx.ch/wordpress/wp-content/uploads/2018/11/20181117_170657.jpg I connected to the 436A and I also installed a SMA 30dB attenuator at the input and connected my power sensor to the power reference of the 436A. At first, the readings were quite off a bit, but using the little trim pot on my PCB, I was able to precisely adjust the gain of my sensor such that the reading on the power meter was exactly 0.00 dBm. I then connected a signal generator to the power sensor and tested various power levels between -10dBm and +20dBm. Incredible, but my power sensor was accurate to 0.1dB! I also tested different frequencies between 1MHz and 2.6GHz. The flatness was not extremely good, but between +/-1dB. So, basically, the concept seems to work. I also tested different ranges for the power sensor - there is a 'mount resistor' inside the HP power sensors (8481, 8482, 9494, ...) which tells the power meter which range the sensor uses; the meter then internally adjusts the gain according to the power sensor range. It appears that it should be possible to home brew such power sensors. However, at the moment, I have two issues: a) the auto zero function does not work - even if I run the autozero feature, the power meter afterwards displays -13dBm anyway, so I cannot properly zero my power sensor. At the moment, I do not understand why this is so. Has anyone on the list an idea? b) I don't understand exactly how the amplifier using the NPN transistor works. When I was adjusting the gain of my sensor, I tried to change the collector resistor (330 Ohms), but this had almost no effect on the gain. The emitter resistor (1k Ohms) also had only little effect on the gain. Only when I placed the pot where it is now I was able to adjust the gain in a wide range. So it basically looks to me like this amplifier is a common emitter amplifier, with the gain being RC / RE, is that true? why then is a feedback from the emitter required to the meter? Thanks for any hints, tips and so on, Tobias HB9FSX
Started by Tobias Pluess @ · Most recent @
Wanted: manual ( .pdf Or paper ) for the HP-3964A-Instrumentation reel to reel tape recorder 18
Wanted: free manual ( .pdf Or paper ) for the HP-3964A-Instrumentation reel to reel tape recorder. I believe the paper manual is ~ 600 pgs... Does anyone have a free paper manual they would me for the postage ? Or the .pdf ? thank you, rick North America
Started by gren @ · Most recent @
HP853A+8559A spectrum analyzer. 31
Hey everyone, I recently picked up an 853A analyzer mainframe and two 8559A 10M-21Ghz modules. Of course, it's broken. They all power up just fine but all I can get on the screen is an horizontal line in the upper section of the screen. It's as straight as it can get. It does seem to respond to the settings as the beam varies. It's a complex instrument and I'm not familiar with it. Does anyone have an idea what's going on with it? I suppose it may be in the mainframe as two modules, although unknown, give the exact same results.
Started by AArnaud @ · Most recent @
HP3456A GPIB problem 20
Working on writing a communications library to control my HP3456A DMMs. One of the meters that I have responds to instructions to read and write just fine. The other meter will read the correct value from the meter and responds to serial polls correctly, but will not accept commands like setting the mode or range. Looking at the GPIB bus with a logic analyzer, it accepts the address with sane looking handshaking, but the first byte of the command string never gets an NDAC response. The transaction then times out. The meter does not hang after this or stop updating the display and reading the keypad. The meters both pass the self test. I looked through the service manual and did not see any reference to the self test doing a checksum on the EPROMs. I am using the same code to talk to both meters. Initially, I was expecting a dead bus transceiver chip, but all of the handshaking signals operate correctly in other parts of the transactions. Now, I am thinking that it is either the GPIB controller chip (MC68488) or possibly an EPROM problem. Has anybody run into this or have any thoughts on this? Thanks, BobH
Started by BobH @ · Most recent @
VS: [HP-Agilent-Keysight-equipment] For sale perfect Hp 8564E 9khz to 40GHz with new LCD display installed nice options 3100Euro
For sale for 3100 Euro or equivalent in US$ is one of Hp's top models. It goes from 9Khz to 40GHz!!. It is a synthezised controlled analyzer and measuring / counting frequency down to 1 Hz resolution. It is an E model that has a resolution bandwidth of down to 1Hz. This means you can see signals 60-70dB down a few hz next to the center frequency. DSP process is used at the lowest bandwidths. Hz offset from the carrier The E model has lower phase noise and lower noise floor which gives higher dynamic range. In addition, it has mounted an HP 85620A memory module. Two software packages are installed on the module 85671A Phasenoise measurement 85672A Harmonic measurements etc. IMD etc The 64E has the following option 007 FAST Scan 008 Mixer ID system for external mixers. (tell you if you measure on the right signal or spurious) The 8564E has been upgraded with a LCD colour screen where different colour setup can be chosen. the analyzer has less than 7000 hours of usage. It measures accurately and complies to specs and works 100%. More of the images shows the Frequency response on 300MHz, 10Ghz, 26Ghz, 35GHz and 40GHz. You can see that the it measures quite accurate. Signal generator was at -10dBm output. The analyzer is in super fine condition with some traces of wear. The YIG tuned filter (RYTHM) has been refurbished. Here is a link to Data on it. https://testequipment.center/Product_Documents/A gilent-8560E-Specifications-5D3D9.pdf HP 8560 E-Series Spectrum Analyzers - testequipment.center HP 8560 E-Series Spectrum Analyzers Technical Specifications HP 8560E 30 Hz to 2.9 GHz HP 8561E 30 Hz to 6.5 GHz HP 8562E 30 Hz to 13.2 GHz HP 8563E 30 Hz to 26.5 GHz HP 8564E 30 Hz to 40 GHz testequipment.center See model HP8564E It can be sent by UPS for around 50-75Euro. I have a sturdy box it can be sent in. If any one want to travel these days it can be tested and picked up at my address. As the sale is private I cannot give any warrenties of course. But if the unit is not as expected it is issued with Tamper labels and if the unit is returned for buyers expense and the Tamper labels are intact and the unit is in same condition as when received it can be returned up to 14days after receiving the unit. No adapters is included or are for sale for the unit. Input is 2.4mm for best performance on 40GHz. For questions call or write. Best regards Peter OZ1LPR
Started by Peter Hansen @
85672A Spurious Response Utility for an 8563E 19
Hey All, I stupidly let the battery in my 85620A go flat, and I've lost my 85672A utility on the card :( Does anyone either have or know where I can grab a copy of this to replace it? Thanks, TonyG
Started by Tony Goodhew @ · Most recent @
WTB 5061B Cesium standard AC power cord 3
Hi I have a 55061B coming to the lab soon and need a power cord for it. If anyone has a spare, or knows what parts I need to make one, I¡¯d appreciate it. Thanks, Brian
Started by mill_glen_chevy @ · Most recent @
[WTD] 8303A HP-IB interface
Looking to upgrade an 8503A with Opt 001 HP-IB interface. Does anyone have an 08503-60016 interface card excess to their needs? Any suggestions / experiences on the upgrade process, hints and kinks? thanks, Ron
Started by Ron @
Hp 8590 A Photo for Jinxieq 2
Hi Jinxie. The photo Is for you. Carlo
Started by ik1gkh@... @ · Most recent @
For sale perfect Hp 8564E 9khz to 40GHz with new LCD display installed nice options
Hello All I will be posting an add for a mint condition hp 8564E with new LCD colour screen. It is fully refurbished and adjusted all the way to 40GHz. It does have the Fast FFT option 007 and external Mixer ID option 008. Of course also the phase noise and Harmonic measurement personalities. Unit is fully refurbished and adjusted to meet all specs. Unit is in mint condition Pictures will come later today price 3100Euro plus shipping best regards Peter OZ1LPR
Started by Peter Hansen @
Looking for HP 10261A 6502 personality module.
Figured i'd take a shot in the dark. Does anyone have an HP 10261A 6502 personality module for an HP 1611A logic analyzer? I'm wanting to do a gamedev video showing how Atari used this setup to debug Atari 2600 games. -Thom
Started by Thom Cherryhomes @
HP42851A EEPROM Read Error 4
Hello, I've managed to snag an HP42851A Precision Q Adapter and the required HP4285A Precision LCR Meter (with option 002) on eBay. Unfortunately, the HP42851A seems to have an EEPROM failure. With the 4285A powered on, I turn on the 42851A and see the following messages in succession: - Setup in Progress - E113: EEPROM Read Status Error - E116: Q Adapter control failuer Images: https://drive.google.com/drive/folders/1GZrZxvoJv2w_Ie9PuT_oGFSF0KEnquS7?usp=sharing I've never fixed an EEPROM failure before. Is anyone here familiar with this device's EEPROM contents?
Started by Nick Kirkby @ · Most recent @
HP 35681A Analysis pack for the 35660A dynamic signal analyser
The documentation for the 35660A signal analyser mentions an analysis software pack that can be installed Does anyone have experience with this option 35681A? Is this a hardware option or something that can be user installed? Are the disks available? Any documentation? Peter
Started by Peter Brown @
hp8080A Mainframe power supply 4
Hello all, I have a hp8080A OPT D01 with 8081A 8084A 8083A plugins and while doing things with the word generator, the power supply started to smoke slowly. I was able to remove power quickly and upon taking the power supply module out, found that a capacitor had failed. Would anyone know where I could find this part or how to craft a replacement? I have not had luck finding any manuals. Thanks in advance. Christopher
Started by Christopher Tucker @ · Most recent @
HP 8590 A 5
Good morning to the whole group. I am new here...and I wanted to be part of this group, as an electronics enthusiast and owner of old HP equipment. Specifically, this is my first post, to ask you what you think of the list that my HP8509A, purchased used about 2 weeks ago, gives me, when in the calibration section, I request the cal data. Following the instructions in the service manual and based on other lists seen online, of other 8590, I have the feeling that something is not entirely ok. I attach a photo of the screen. I am grateful to anyone who can provide me with opinions on the matter. Best regards. Carlo.
Started by ik1gkh@... @ · Most recent @
HP 10430A Probe compensation
Recently got an HP 54502A scope to play with and a set of HP 10430A probes. When compensating the probes the adjustment seems to make very little difference. As in almost none. However the probes seem to work fine and the leading edge of the square wave is good. I tried them on a Tek 465 scope with the same result. To see how crazy I was tried a pair of Tek 6106 probes on the HP 54502A and the compensation adjustment worked just as I expected which is to say made a definite difference and had to be set correctly for the square wave to display properly. I at first thought both HP probes were 'bad'; they are after all 'vintage'. But they seem to function. What am I missing here? -- W0MPM John
Started by John W0MPM @
Hp 8590 A
Good morning to the whole group. I am new I wanted to be part of this group, as an electronics enthusiast and owner of old HP equipment. Specifically, this is my first post, to ask you what you think of the list that my HP8509A, purchased used about 2 weeks ago, gives me, when in the calibration section, I request the cal data. Following the instructions in the service manual and based on other lists seen online, of other 8590, I have the feeling that something is not entirely ok. I attach a photo of the screen. I am grateful to anyone who can provide me with opinions on the matter. Best regards. Carlo.
Started by ik1gkh@... @
KO4BB manuals site error 13
I just got the following error when going to Didier¡¯s manuals directory: Error: Target directory does not exist. Anyone else tried it recently? Steve
Started by Steve - Home @ · Most recent @
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