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Re: 8481A Repair
I would have spent the 400-600 dollars for a calibrated 437 and power sensor if I had not got mine much cheaper. The point¡¡¡¡¡i thought the same thing, but then realized that this is one of those times when simply paying the piper is the way to go. It is a VERY rare occasion that this is true for me, but here it is almost fact.
Cheers, David |
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Re: 8481A Repair
Tom Miller
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Re: HP 215A manual
¿ªÔÆÌåÓýGreetings,?lists the HP-215A manual with schematics for $12.50. This will be a very high quality scan. ?I have purchased a number of scans from them with total satisfaction. Regards, Ken
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Re: HP 215A manual
¿ªÔÆÌåÓýRudi et all
If you dont find a free copy , we have an excellent scanned copy for download at a fair price Cheers Dave ArtekManuals.com On 10/21/2015 2:55 AM, rbforum@... [hp_agilent_equipment] wrote: ? -- Dave Manuals@... |
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Re: HP 215A manual
Hi Dan and George,
I have a non-working 215A on my desk and besides of lacking enough old oval connector power cords I am in need of a manual. So if you already have a scanned manual I would be glad to receive a copy of it. Any help would be appreciated, even schematics only would help. Thanks and regards, Rudi |
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Re: 8754D vs 8753ES
¿ªÔÆÌåÓýThanks, david. I have found several postings on the differences between the E and ES. Apparently only 2 extra buttons on the front panel and nothing else.? It does seem odd that the ¡°D¡±s look like higher asking prices by a coupla hundred. Could be an anomaly, I haven¡¯t studied it for very long Thanks ? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Tuesday, October 20, 2015 8:25 AM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 8754D vs 8753ES ? ? On 20 October 2015 at 15:36, W2HX w2hx@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: ? Other than the LCD display, is the 8753ES any ¡°lesser¡± of a VNA than a similarly outfitted ¡°D¡±? I ask because it seems that many ES¡¯s go for less money than the ¡°D¡±s. is this just a fluke of a lot of supply of the ESs? Any thoughts on this? Thanks Eugene W2HX ? Not that I am aware of. The ES has the advantage that there are 4 buttons for switching channels. It also takes later firmware, and I suspect that means it has a later (faster) CPU. Now I don't know what difference there is between an 8753E and an 8753ES. That might be worth investigating more, but i would certainly not buy a D unless it was a lot cheaper than an E or ES. Despite the extra bulk, I'd buy one with an external test set, as it gives you a lot more flexibility. Note the 6 GHz option on the D/E/ES are all hardware, so you can't easily upgrade them. ? Dave |
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Re: 8754D vs 8753ES
Dr. David Kirkby (Kirkby Microwave Ltd)
On 20 October 2015 at 15:36, W2HX w2hx@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Not that I am aware of. The ES has the advantage that there are 4 buttons for switching channels. It also takes later firmware, and I suspect that means it has a later (faster) CPU.
Now I don't know what difference there is between an 8753E and an 8753ES. That might be worth investigating more, but i would certainly not buy a D unless it was a lot cheaper than an E or ES. Despite the extra bulk, I'd buy one with an external test set, as it gives you a lot more flexibility. Note the 6 GHz option on the D/E/ES are all hardware, so you can't easily upgrade them. Dave |
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Re: Agilent E2050A ethernet GPIB adapter
¿ªÔÆÌåÓýI¡¯m currently running two E2050¡¯s here, and they work fine with IO Libs version 16.3.17194.4.?? I¡¯m debating moving to ver. 17, but they have completely changed the UI, and a first look was a disappointment. These don¡¯t support DHCP like the newer ones, but in a situation like this, I think it¡¯s better to run fixed IP anyway. ? Daun ? Daun E. Yeagley, II, N8ASB ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Tuesday, October 20, 2015 10:53 AM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] Agilent E2050A ethernet GPIB adapter ? ? On Tue, Oct 20, 2015 at 3:42 AM, timhughes@... |
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Re: Agilent E2050A ethernet GPIB adapter
On Tue, Oct 20, 2015 at 3:42 AM, timhughes@...
[hp_agilent_equipment] <hp_agilent_equipment@...> wrote: According to the Keysight IO Libraries Suite Unsupported Interface Support Matrix - Technical Overview the last release to support the E2050A/B LAN/GPIB Gateway was version M.01.01 released on 2003-04-10 supporting up through Windows XP SP3. I have an E2050A that I haven't tried using in a while. I forget if I ever checked whether the E2050A was in fact actually not recognized by the next available release (version 14.0.7202.1 released on 2004-12-02), or whether version M.01.01 could still be installed on systems later than Windows XP SP3. |
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8754D vs 8753ES
¿ªÔÆÌåÓýOther than the LCD display, is the 8753ES any ¡°lesser¡± of a VNA than a similarly outfitted ¡°D¡±? I ask because it seems that many ES¡¯s go for less money than the ¡°D¡±s. is this just a fluke of a lot of supply of the ESs? Any thoughts on this? Thanks Eugene W2HX ? |
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Power button (not switch) for 8970A noise figure meter.
Dr. David Kirkby (Kirkby Microwave Ltd)
I've got a 8970A, but the power button is missing - the switch is there. I'm not quite sure how it can fall out, but it seems to have done. Does anyone have one of these spare? Looking on eBay at some 8970As, the colour should be a lightish cream, the same as the numbers on the numeric keypad, but I am not too bothered about that. Just hopefully something that will not look out of place. |
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Agilent E2050A ethernet GPIB adapter
We had a discussion of the newer HP agilent ethernet to GPIB adapters previously. Does anybody know if these older (E2050)? 10base T ,adapters will work with current Agilent software suite when identifying adapters/equipment on the network etc. They were being supported at least in about 2000 or so. They are sometimes available quite cheaply on ebay. Anybody have any comments on them? Tim Hughes |
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Re: HP 83592B hangs 8350B sweeper
¿ªÔÆÌåÓýI Tee¡¯d the video and set very narrow span and now I see pulses. The A8R55 RTC COMP moves pairs together but does not change the shape. Some pulses are on the flat part of the sweep waveform and some are on the slopes. ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October-18-15 3:01 PM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper ? ? I got as far as step 5-5, YO retrace compensation. I am using an HP 8566A Spectrum Analyzer but cannot see the signal shown. I assume the top trace is the chan B input sweep from the 8350B, I see that and can delay along it. The bottom trace would be the video from the 8566A but which video. There is one jumpered at the back but if disconnected there is no display on the 8566A. The other is the plotter video and I doubt it is this one, it does nothing anyway. I suppose it does not matter that I disconnect the jumper, however I see nothing on the ¡®scope but a straight line. I get that I am looking for the 7 GHz switch point that shows up at 3.5 GHz because the Aux is half freq. What should the span be? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ?Hi Peter, I have done this calibration several ?time , I think ?the A vs B is the X-Y display on the scope , I was using the HP 1740A oscilloscope to do this. The intensity must set to the high position because it is difficult to see the crest of the ramp to 0V. Regards ON1EV Belgium |
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Re: HP 83592B hangs 8350B sweeper
¿ªÔÆÌåÓýI got as far as step 5-5, YO retrace compensation. I am using an HP 8566A Spectrum Analyzer but cannot see the signal shown. I assume the top trace is the chan B input sweep from the 8350B, I see that and can delay along it. The bottom trace would be the video from the 8566A but which video. There is one jumpered at the back but if disconnected there is no display on the 8566A. The other is the plotter video and I doubt it is this one, it does nothing anyway. I suppose it does not matter that I disconnect the jumper, however I see nothing on the ¡®scope but a straight line. I get that I am looking for the 7 GHz switch point that shows up at 3.5 GHz because the Aux is half freq. What should the span be? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October-18-15 5:42 AM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper ?Hi Peter, I have done this calibration several ?time , I think ?the A vs B is the X-Y display on the scope , I was using the HP 1740A oscilloscope to do this. The intensity must set to the high position because it is difficult to see the crest of the ramp to 0V. Regards ON1EV Belgium
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Re: HP 83592B hangs 8350B sweeper
¿ªÔÆÌåÓýThank you, and the others that responded. Yes that worked and the TP8 signal appeared as shown. R37 must alter BND SW and somehow change what is sent from the BandSw DAC or the TV buffer. I don¡¯t understand but it does adjust as described. I counted the number of turns and noted them just in case. Peter. ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October-18-15 5:42 AM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper ? ? Hi Peter, I have done this calibration several ?time , I think ?the A vs B is the X-Y display on the scope , I was using the HP 1740A oscilloscope to do this. The intensity must set to the high position because it is difficult to see the crest of the ramp to 0V. Regards ON1EV Belgium De?: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ? ? Has anyone done a calibration on one of these plug-ins? Step 20 in adjustments: What does A vs B mode on an oscilloscope mean? I think HP means trigger on B and look at A ??(A + B or A ¨C B will not work. The waveforms are completely different time/div and shapes) A6-TP8 does not have positive sweeps as shown. They go negative from 0 to -10v. Step 22: A6R37 will not affect TP8 an far as I can see. Am I missing something? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ? ? GREAT PROGRESS! Thanks Steve, you are quite correct. My A7 board is marked 83595 and works in this 83592 plug-in. However I suspected that the A6 board that was causing all the trouble was actually from an 83595 not an 83592. I removed the 4L and 4H pots, installed the R63 pot, moved the Band jumper, ?and concentrated on the Sweep Control and Bandswitch circuits. The A3 SW1 forces the signals to go through the variable gain amplifier for troubleshooting. Using this setting I could sweep band 0 but was finding that the TP7 signal was going positive by 2.4 volts. It should start at 0v and go negative to -10v max. There was an offset in the variable gain amplifier! I had also noticed that the gain seemed high. The schematics showed the gain resistors to be the same as the ones on the bad A6 board but they were different from the ones on the good A6 board. The parts list agreed with the resistors on the good A6 board so I assumed them to be correct. This was not the first error on the schematics I had found. Troubleshooting: Set sweep from 1 MHz to 1.1 MHz so TP5 is essentially at 0v. Check TP1 (BandSw DAC O/P) is 1.195v on good A6 and 1.194 on bad A6. So far so good. Check U5-6 is -10.05v on good A6 but is? -12.73v on bad board. TP7 is 0v on the good A6 but is +2.4v on the bad board. Conclusion: the gain is too high and is tripping U14 in the Bandswitch Comparator. Change all 4 gain resistors: R29???????? B0?????????? was 109.73k??????? change to 82.541k (TP7 is now 0v with the above test) R27???????? B1?????????? was 57.014k??????? change to 42.884k R25???????? B2?????????? was 40.423k??????? change to 30.423k R23???????? B3????????? was 40.423k??????? change to 30.423k Now the plug-in sweeps from 0.01 to 20 GHz and the INSTR PRESET no longer hangs the 8350B. Conclusion: The A6 board was from an HP 83595. I can now proceed with the calibration bu expect some problems because the resistors I used were 1%, not 0.1%, and are not the exact values. I may not have enough range of adjustment. I may also run into problems in the SRD and PIN diode bias circuits because of component values. Some of the analog switches are normally closed (PMI SW06) but are shown open on the schematic. U2A pins 1 & 2 are switched, U2A-2 goes to U13-11. Peter. ? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ? ? Peter, ? I have an 83594A and an 83595A wth boards that have mismatched part numbers so it may not have been anything nefarious but if so its contagious! There are a couple of boards that don't match any of the manuals I've been able to find, and there are switches that open parts of loops, and pots for adjustments, and none are mentioned in any manual. The "joys" of working on older gear! WB0DBS ? ?
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FS: Parts from an 8515A 26.5 GHz S-parameter test set (used on 8510 VNAs)
Dr. David Kirkby (Kirkby Microwave Ltd)
Over the next few weeks I will be stripping down an 8515A S-parameter test set. I will not be selling the bridges, but anything else might be up for grabs. If you have any damaged or missing parts, send me a photo, part number and offer. Send it off-list. |
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Re: HP 83592B hangs 8350B sweeper
¿ªÔÆÌåÓýHi Peter, I have done this calibration several ?time , I think ?the A vs B is the X-Y display on the scope , I was using the HP 1740A oscilloscope to do this. The intensity must set to the high position because it is difficult to see the crest of the ramp to 0V. Regards ON1EV Belgium De?: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ? ? Has anyone done a calibration on one of these plug-ins? Step 20 in adjustments: What does A vs B mode on an oscilloscope mean? I think HP means trigger on B and look at A ??(A + B or A ¨C B will not work. The waveforms are completely different time/div and shapes) A6-TP8 does not have positive sweeps as shown. They go negative from 0 to -10v. Step 22: A6R37 will not affect TP8 an far as I can see. Am I missing something? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October-17-15 5:54 PM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper ? ? GREAT PROGRESS! Thanks Steve, you are quite correct. My A7 board is marked 83595 and works in this 83592 plug-in. However I suspected that the A6 board that was causing all the trouble was actually from an 83595 not an 83592. I removed the 4L and 4H pots, installed the R63 pot, moved the Band jumper, ?and concentrated on the Sweep Control and Bandswitch circuits. The A3 SW1 forces the signals to go through the variable gain amplifier for troubleshooting. Using this setting I could sweep band 0 but was finding that the TP7 signal was going positive by 2.4 volts. It should start at 0v and go negative to -10v max. There was an offset in the variable gain amplifier! I had also noticed that the gain seemed high. The schematics showed the gain resistors to be the same as the ones on the bad A6 board but they were different from the ones on the good A6 board. The parts list agreed with the resistors on the good A6 board so I assumed them to be correct. This was not the first error on the schematics I had found. Troubleshooting: Set sweep from 1 MHz to 1.1 MHz so TP5 is essentially at 0v. Check TP1 (BandSw DAC O/P) is 1.195v on good A6 and 1.194 on bad A6. So far so good. Check U5-6 is -10.05v on good A6 but is? -12.73v on bad board. TP7 is 0v on the good A6 but is +2.4v on the bad board. Conclusion: the gain is too high and is tripping U14 in the Bandswitch Comparator. Change all 4 gain resistors: R29???????? B0?????????? was 109.73k??????? change to 82.541k (TP7 is now 0v with the above test) R27???????? B1?????????? was 57.014k??????? change to 42.884k R25???????? B2?????????? was 40.423k??????? change to 30.423k R23???????? B3????????? was 40.423k??????? change to 30.423k Now the plug-in sweeps from 0.01 to 20 GHz and the INSTR PRESET no longer hangs the 8350B. Conclusion: The A6 board was from an HP 83595. I can now proceed with the calibration bu expect some problems because the resistors I used were 1%, not 0.1%, and are not the exact values. I may not have enough range of adjustment. I may also run into problems in the SRD and PIN diode bias circuits because of component values. Some of the analog switches are normally closed (PMI SW06) but are shown open on the schematic. U2A pins 1 & 2 are switched, U2A-2 goes to U13-11. Peter. ? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ? ? Peter, ? I have an 83594A and an 83595A wth boards that have mismatched part numbers so it may not have been anything nefarious but if so its contagious! There are a couple of boards that don't match any of the manuals I've been able to find, and there are switches that open parts of loops, and pots for adjustments, and none are mentioned in any manual. The "joys" of working on older gear! WB0DBS ? ?
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Dale Dean / AF7WH