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Re: 85685A special cabling changes
The Spec An / Preselector combination does not work without the HSWP connection. There is an error that announces the lack of the connection and the instrument will not go beyond that point.
As far as the two cable types with the different HSWP pickoff, there is no apparent difference in the functionality or effect on measurement accuracy. I had a set of the 8574A cables that had the pickoff on the cable connector side and used that set for performance testing of all vintages of the system when the customer cables were not shipped with the unit. Bill |
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Re: counter
Hi Max,
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I have refurbished many of the 5335A, and several 5334A/B models over the past several years. There is good news and bad news on how repairable these models may be. The bad news is that these are getting fairly long in the tooth, and some parts are reaching the "unobtainium" stage. The good news is that there are many of these counters still on the market, and if one shops well, one may find a good "donor" or two to fix the first unit for not too much money. This method is actually how I got started refurbishing HP gear. I bought a 5335A Counter for my setup, and the odds were against me in that it did not work. The needed parts were not available through normal suppliers such as Mouser. So, I boughts another unit, and it worked! It took two or three more units to find one that did not work, so that I could make it a donor unit. By that time, I had a pretty good inventory of spare parts accummulated... My experience is that only about 10% of the 5335A counters work out of the box. The most common trouble has been the A3/A12 boards with bad Schmitt amplifer ICs and signal relays. You need to be able to work on densly populated circuit boards to repair these. Another common problem has been the power supply switching relays overheating on the older models. Later designs cured this by changing from a 120 VAC fan to a 24 VDC fan along with diode protection from the inductive load switching. I can go on for many pages about other issues I have found in the 5335A models and repaired, but will spare you and the group. I you want more information, please contact me offline. The 5334A models have their share of issues, but because of simplicity and somewhat newer design, the only real issues have been the signal relays on the main board becoming stuck in one position or the other. This is easy to fix with a soldering/desoldering station and parts that are currently available from Mouser. Now the real issue is that you need some basic test equipment in order to align these counters once you get them working. When there are no defective parts, they work pretty well, but severe alignment problems will stop them, and you need to be able to align your counter to ensure that your measurements are accurate. For that, you will need a two channel oscilloscope, signal generators, such as a 3325A/B for the low frequencies, 8657A or similar for the high frequencies, pulse generator (8082A), and a good frequency reference, such as Rhubidium Oscillator or GPSDO (Z3801A or Thunderbolt). You may need some additional gear for Channel C such as a 8657B (1300 Mhz), a power meter/sensor, and a 50 ohm splitter. These are great counters and do a remarkable job, especially considering their age. I truly enjoy working on them and refurbishing for others to enjoy. Choose a reliable seller - many of the "Top Sellers" will send you garbage and will not pack the equipment properly, but that is a whole separate topic. Best of luck with your decision. Regards, Joe, KN5U --- In hp_agilent_equipment@..., "Max Robinson" <max@...> wrote:
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85685A special cabling changes
Tim Hughes
I was reading through the online manuals for the 85685A pre-selector, and noticed that they show two different cabling setups in? two different manuals.
I was wondering if they are interchangeable or whether it depends on what revisions of the SA or pre-selector? you own? The earlier 1995 (-90003) manual shows a small adapter that plugs in between? the system bus cable, just before it enters the SA itself. This is connected via a coax cable to the pre-selector. The connector cable is a BNC to SMA. The later 1991 (-90098) user manual/programmers manual shows the same coax going to the middle of a modified system cable connector,which now has an SMA connector mounted directly on it at the display box end. The part number is stated as 85662- 60220 for the 50pin bus cable with SMA. One might guess they are functionally identical and just save the adapter connector on the original setup? Aparently the cable acts to adjust or blank output when the pre-scaler is changing from one band to another. The low frequency band has a number of separate prefilter bands and the high range two prefilter bands,the higher frequency one being the tuneable YAG filter. The manual also mentions tuning via varacter on some ranges. The newer manual also says: "Verify the SA interconnect cable (50pin0 has a HSWP IN/Out port. If not replace with the one supplied" Does the system work, with display glitches etc if the SMA connector is not hooked up? Can anybody throw any light on these differences and has anybody tried patching a regular cable to add a SMA adapter? Thanks, Tim |
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Re: counter
If one gets one of these and it doesn't work, how repairable is it?
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Regards. Max. K 4 O DS. Email: max@... Transistor site Vacuum tube site: Woodworking site Music site: To subscribe to the fun with transistors group send an email to. funwithtransistors-subscribe@... To subscribe to the fun with tubes group send an email to, funwithtubes-subscribe@... To subscribe to the fun with wood group send a blank email to funwithwood-subscribe@... ----- Original Message -----
From: "Peter Gottlieb" <hpnpilot@...> To: <hp_agilent_equipment@...> Sent: Friday, March 15, 2013 9:54 PM Subject: Re: [hp_agilent_equipment] Re: counter The 5334 and 5335 also have reciprocal counting, so keep an eye out for all of |
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8920B Saving last condition?
Hi,
Is there a fairly simple keyboard command that will set up the 8920B to 'hold' the last instrument settings for recall when the unit is next powered up? It's time consuming to program 'typical' settings in memory, and even more so to keep track of the memory number of all frequently used settings when using the unit for essentially the same function on next boot after a shutdown. Thanks...... |
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Re: counter
Peter Gottlieb
The 5334 and 5335 also have reciprocal counting, so keep an eye out for all of them. Last 5334B I got I paid $40 and it was mint. It didn't have the good timebase oscillator but I use a rubidium distributed around so didn't need it.
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These prices are insane for what you get. On 3/15/2013 6:06 AM, adrian_microwave wrote:
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3709 vs 8981 monitors?
Hi there. Can someone explain to me the difference between what these two instruments are used for? They seem very similar.
3709a/b - Constellation Analyzer 8980/81/a/b - Vector Analyzer and HP 8981A Vector Modulation Analyzer I did some googling but am new to IQ concepts and I could not discern the differences in the function of these units. Could a simple explanation suffice? thanks 73 Eugene W2HX |
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Re: counter
J. Forster
Congratulations, Gene.
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Now you need to join the EIP_microwave Yahoo Group! -John ============== I just bought an EIP 575B which will do 20 GHz with 1 Hz resolution. It |
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Re: counter
I just bought an EIP 575B which will do 20 GHz with 1 Hz resolution. It also has a source locking feature to steer an oscillator to phase lock it (like a sweeper). Picked it up for $200 on ebay last night. I really like the EIP counters (also have a 548 which goes to 26 GHz)
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of J. L. Trantham Sent: Thursday, March 14, 2013 11:35 PM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] counter Might want to take a look at the HP 5315A and B and the 5316A and B. I like the 5334B as well. Might want to download the manuals from the HP website (Agilent) and look at the various options and features. Patience will result in a good price. Good luck. Joe -----Original Message----- From: hp_agilent_equipment@...<mailto:hp_agilent_equipment%40yahoogroups.com> [mailto:hp_agilent_equipment@...<mailto:hp_agilent_equipment%40yahoogroups.com>] On Behalf Of Paul Kraemer Sent: Thursday, March 14, 2013 8:20 PM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment%40yahoogroups.com> Subject: [hp_agilent_equipment] counter I am beginning to shop for a better frequency counter for my test bench I don't need uhf or even vhf but I do want something HP that I can rely on 10mhz and below Something basically simple but not a toy. I have a couple of those already. Compact size and latest gee whiz item is not so important as budget, reliability, serviceability. OK, I'd like cheap if that is possible. I don't mind fixing ebay finds if it isn't going to be impossible to get it calibrated. So many models I thought I'd start here Thank-you Paul K0UYA ------------------------------------ Yahoo! Groups Links |
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Re: HP 11664 detector cable
Hi Philippe,
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? I believe I have some of these. I will check and let you know. ? Regards, ? Jim --- On Fri, 3/15/13, phaselock <philgievres@...> wrote:
From: phaselock <philgievres@...> Subject: [hp_agilent_equipment] HP 11664 detector cable To: hp_agilent_equipment@... Date: Friday, March 15, 2013, 6:19 AM ? I am looking an extended cable for my 11664 detector. Ineed to make somme measure 5 to 6 meters from my 8757A scalar anlyzer. If somebody have this cable i am interesting. Best regards. Philippe [Non-text portions of this message have been removed] |
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Re: counter
Paul,
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if you want to measure low frequencies with high resolution, you will definitely want a counter with reciprocal counting. Otherwise you're waiting for ages, especially with audio signals. The 5315A (w/o HPIB) and 5316A/B (w/HPIB) are the best bang for the buck, IMO. They are powerful tools, small, come without a noisy fan and can be had for stunning little money if you are a little patient. Adrian --- In hp_agilent_equipment@..., "Paul Kraemer" <elespe@...> wrote:
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Re: New USB to GPIB Board - Galvant Industries - Anyone tried this?
--- In hp_agilent_equipment@..., "danaz.chandler" <djn@...> wrote:
Isn't it casagrande's project with a new name I haven't tried it /Bingo |
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Re: ho 8558B
I bought a Marconi signal generator for part or repair (I hope the
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latter when I get around to it) from Israel. The packaging was excellent, postage quite reasonable and it arrived speedily without any damage, as described. I was very happy with the deal. I'm in Australia but I assume it would be the same to other countries. I guess in the end you grits your teeth and takes your chances. Don Black. On 15-Mar-13 7:37 AM, Stuart wrote:
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Re: counter
Might want to take a look at the HP 5315A and B and the 5316A and B.
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I like the 5334B as well. Might want to download the manuals from the HP website (Agilent) and look at the various options and features. Patience will result in a good price. Good luck. Joe -----Original Message-----
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of Paul Kraemer Sent: Thursday, March 14, 2013 8:20 PM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] counter I am beginning to shop for a better frequency counter for my test bench I don't need uhf or even vhf but I do want something HP that I can rely on 10mhz and below Something basically simple but not a toy. I have a couple of those already. Compact size and latest gee whiz item is not so important as budget, reliability, serviceability. OK, I'd like cheap if that is possible. I don't mind fixing ebay finds if it isn't going to be impossible to get it calibrated. So many models I thought I'd start here Thank-you Paul K0UYA ------------------------------------ Yahoo! Groups Links |
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Re: counter
Peter Gottlieb
I like the 5334B. A little patience and one can be gotten pretty cheaply.
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Calibration? Really just the frequency standard. How close do you need it to be? On 3/14/2013 9:20 PM, Paul Kraemer wrote:
I am beginning to shop for a better frequency counter for my test bench |
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counter
Paul Kraemer
I am beginning to shop for a better frequency counter for my test bench
I don't need uhf or even vhf but I do want something HP that I can rely on 10mhz and below Something basically simple but not a toy. I have a couple of those already. Compact size and latest gee whiz item is not so important as budget, reliability, serviceability. OK, I'd like cheap if that is possible. I don't mind fixing ebay finds if it isn't going to be impossible to get it calibrated. So many models I thought I'd start here Thank-you Paul K0UYA |
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