Limits of the Port Extension on the Cal screen for calibrating at end of cable
Hello Group:
I have an 8753C and am wondering what the upper limit on cable length would be if I place the cal standards at the end of a cable to do remote measurement of S11.?? In other words I am using SOL, with the cal standards placed at the end of a 100 foot length of RG-213.? Theoretically placing the measurement plane at the end of the cable.? I have already done this and the results seem to be accurate relative to an actual measurement at the that physical place.
I hope I have explained this issue sufficiently.?
Regards,
Karin Johnson??
BTW: I have had an account on the Keysight forums in the past and have recently tried to login to that site, but It won't let me.? Possibly password have changed, and I cannot create a new account.? I have posted with Keysight support and hope they return the email.?
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Re: E4407B RYTHM Repair / Replace
Hello Kalle and Bob I worked out a method of adjusting a bad RYTHM tower. That works for the HP8563E and for the E4407. They share the tower as far as I know.
Problem is the E4407 cannot be calibrated withot special software that is not available.
After a Tower adjust it is needed to adjust the flattness over the band from 2.9 to 26.5Ghz
best regards Peter
Hi Bob,
I am working on my own RYTHM with some success.
Can you do the following:
Insert CW at 4GHz, -20dBm.
Apply the following settings on E4407B:
Center freq 4GHz
Span 250MHz
Resolution BW 1MHz, Video BW 1MHz
Preselector Center: Front Panel Access: AMPLITUDE/Y Scale, Presel Center
Do you get a peak of reasonable amplitude at 4GHz after this?
If you do, then your YTF polynomial might be off. I am working on a procedure for this.
Best regards
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Re: Info Need on a RF FET for a Agilent E4438C signal generator
Hello Lothar It is a Fet. I does have a biasing system where is measures to drop over the Drain supply and then give bias to the Gate. The circuit does include matching network. I added a SHF-0189 in the circuit and it works but too low output for the High
output option mounted. I can find traces on the Net over the M11X but only that it is a HFET.
The Fet is in the ALC loop so the amplitude is not really a problem as long as there is enough. I am afraid that is not the case. I wonder if a MMIC would work in the spot. I need one working from 250khz to 4Ghz. the 4 to 6Ghz path is another board so the Part
only need to go to 4Ghz.
sorry no schematics over the E44XX series
best regards Peter OZ1LPR
Do you have the schematic of the stage ?? if so can you share it ?
Let me render a few comments / thoughts on this :
- The first thing that needs to be established is whether the original part is a FET or a MMIC amplifier ,? you can tell by looking at the schematics , if there is a bias applied to both input and output
or just the output of the block , if bias is only applied to the output than its more than likely a MMIC amplifier if bias exists on both gate and drain than it’s a FET/HEMT !
- If the part is a FET than there should be matching as well as feedback networks present , since this is a stage operating over a wide frequency range resistive feedback between gate and drain will most
certainly be required in addition to lumped input and output matching circuits
- Based on the gain and output power estimate you provided as well as the frequency range of the generator I question the assessment of this part being a FET and rather assume this being a MMIC as it would
be hard to reach 20Db gain and 27dBm P1Db up to 4GHz
- If the part is a FET using matching networks it will be hard to find a drop in replacement , if you were to find a part in a SOT-89 package you will most certainly have to re-design the matching networks
as S-parameters will be different
?
?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]>
On Behalf Of Peter Hansen via groups.io
Sent: Wednesday, May 25, 2022 4:16 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Info Need on a RF FET for a Agilent E4438C signal generator
?
I am rapiring a E4438C generator. There is a FET shorted in the output of chain of the 4Ghz path. The FET is called M11X1005. I can see traces of it existing
but no data. The SHF-0189Z can be used but not directly. The M11X1005 is using 6.5V on the drain but the SHF-0189 uses 8V and has higher gain and higher output.
Does anyone have either a M11X1005 Fet, data or a suitable repleacement.
I would assume something having 20dB of gain and +27dBm output.
best regards Peter
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Re: HP/Agilent/Keysight VEE for a reasonable price?
I'll check those older versions out. Do you know if they are full working versions, or still subject to requiring a valid license key?
Re. the 30 day limitation, I wonder if doing the old trick of setting the date in Windows into the future during install and then winding it back after the install is completed will work to extend the trial time?...... :D
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Counter N53230A: inner IC designation
Hello, everyone! I've got the defective frequency counter N53230A (option 115 15 GHz).?
I've realised that inner IC and resistance are burned. I guess, due to level of input signal was too high.?
Does anyone know IC designation or type and how does it called? Or how can I get this information?
Please find attached IC and board photos.
Thank you
Best regards
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OT: HP 200LX Service / Maintenance Manual
HI all,
Slightly off topic, has anyone ever seen or has the HP 200LX Palmtop service manual or schematics?
I have one on the bench that I'd like to try to fix, it has some motherboard issue.
Thanks!
--
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Re: HP/Agilent/Keysight VEE for a reasonable price?
hi Jared,
Is the below legacy archive of use ?
The newer 9.33 version is available for 30 days, .... not certain if it is renewable repeatedly ...
Anyone else know ?
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Re: HP 8662A Power up - overvoltage shutdown
I modified a 8662 with the meanwell supplies. Works great. Will not argue nor can I prove that somehow the meanwells added some noise or other artifact. Its?just works. It was a job to install them. Also like you before going to that trouble I jumpered in external supplies to insure the 8662 only had this one issue. That was the case.? I did a?serious attempt to repair the HP switcher. It was really good at destroying transistors in a flash. They are expensive. So the meanwells have a fixed one time?cost. I have another 8662 that works but only when needed doesn't.... Very hard to catch whats?going on. Good luck, nice generator when working. Regards Paul
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Re: Frequency range of HP 5352B frequency counter
I have 2 5350B counters, one unit had very poor sensitivity on input 2.
I found a diode on that input PCB slightly leaky in and out of circuit, it
was easy to find and that corrected the problem.
If interested I can look up further information??
--
Jeffeelcr.
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Re: anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
Yes, I wish there were more hamfests on the schedule. Will keep eyes out.?
73 se Samudra N3RDX?
On Wed, May 25, 2022, 17:53 Tom Lee < tomlee@...> wrote:
I've encountered a fair number of Autohet(Racal-Dana) microwave
counters at hamfests and e-fleas for under $100. They're rack mount
affairs, so not as convenient a form factor as your counter.? The
more modern Racal-Dana 2101 is similar in specs and form factor to
your 5342A, so that might be worth considering. It does have a
congenital design weakness, though -- the pushbuttons are crap.
Replacing them is straightforward and cheap, but tedious.
If your needs would be satisfied with a top end of 14GHz or so (mine
makes it to 16GHz, albeit with degraded sensitivity), you can build
a divide-by-eight prescaler fairly easily, using the Hittite (now
ADI) HMC363. They also have (or had) an eval board, if you prefer
pre-made over DIY. Couple that with a dirt-cheap 2GHz counter, and
you'd be good to go.
--Cheers
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 5/25/2022 14:31, Samudra wrote:
Hi again, I am installing my HP 5342a counter, which is working,
but it never came with GPIB i/f. I see the manual specifies option
001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP
Input Assy.
Not wanting to spend more money into this beast (that much), are
these parts unobtanium? I'm just wanting to automate certain set
of measurements I plan to do. It's not do or die, just will take
time to do them that's for sure.?
What's a reasonable, ham-friendly counter that does the same thing
as the HP5432a nowadays? I have seen many smaller counters up to 2
Ghz within reach .. but 18 GHz??
|
Re: HP 8662A Power up - overvoltage shutdown
Thanks Askild - I read your thread - really interesting project - thanks for sharing it.
Your current draw info is really useful. ?I had no idea the 5.2V supply drew that amount of current. The instrument is pretty power hungry (I think the spec sheet quoted 470 VA max) so I should have expected this in retrospect.
im going to try loading up the PSU I (think I) have fixed to much nearer these typical operating values and see if it abolishes the start up problems.
thanks
Tony
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Re: anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
Hi,
It's not at all unobtanium. In fact, I have purchased an option 011 (it is the HPIB, 001 is the OCXO) some time ago on eBay. It consists of the HPIB board that plugs into the backplane and the HPIB connector that goes to the back of the instrument. It wasn't very expensive, I guess there is not much demand, but there are not that many for sale. However, you can watch for cheap faulty 5342a's mostly with blown front-end that has hpib and use that.
Szabolcs
Hi again, I am installing my HP 5342a counter, which is working, but it never came with GPIB i/f. I see the manual specifies option 001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP Input Assy.
Not wanting to spend more money into this beast (that much), are these parts unobtanium? I'm just wanting to automate certain set of measurements I plan to do. It's not do or die, just will take time to do them that's for sure.?
What's a reasonable, ham-friendly counter that does the same thing as the HP5432a nowadays? I have seen many smaller counters up to 2 Ghz within reach .. but 18 GHz??
|
Re: Info Need on a RF FET for a Agilent E4438C signal generator
Do you have the schematic of the stage ?? if so can you share it ?
Let me render a few comments / thoughts on this :
- The first thing that needs to be established is whether the original part is a FET or a MMIC amplifier ,? you can tell by looking at the schematics , if there is a bias applied to
both input and output or just the output of the block , if bias is only applied to the output than its more than likely a MMIC amplifier if bias exists on both gate and drain than it’s a FET/HEMT !
- If the part is a FET than there should be matching as well as feedback networks present , since this is a stage operating over a wide frequency range resistive feedback between gate
and drain will most certainly be required in addition to lumped input and output matching circuits
- Based on the gain and output power estimate you provided as well as the frequency range of the generator I question the assessment of this part being a FET and rather assume this being
a MMIC as it would be hard to reach 20Db gain and 27dBm P1Db up to 4GHz
- If the part is a FET using matching networks it will be hard to find a drop in replacement , if you were to find a part in a SOT-89 package you will most certainly have to re-design
the matching networks as S-parameters will be different
?
?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]>
On Behalf Of Peter Hansen via groups.io
Sent: Wednesday, May 25, 2022 4:16 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Info Need on a RF FET for a Agilent E4438C signal generator
?
I am rapiring a E4438C generator. There is a FET shorted in the output of chain of the 4Ghz path. The FET is called M11X1005. I can see traces of it existing but no
data. The SHF-0189Z can be used but not directly. The M11X1005 is using 6.5V on the drain but the SHF-0189 uses 8V and has higher gain and higher output.
Does anyone have either a M11X1005 Fet, data or a suitable repleacement.
I would assume something having 20dB of gain and +27dBm output.
best regards Peter
|
Re: anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
On 5/25/22 17:31, Samudra wrote: Hi again, I am installing my HP 5342a counter, which is working, but it never came with GPIB i/f. I see the manual specifies option 001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP Input Assy.
Not wanting to spend more money into this beast (that much), are these parts unobtanium? I'm just wanting to automate certain set of measurements I plan to do. It's not do or die, just will take time to do them that's for sure.
What's a reasonable, ham-friendly counter that does the same thing as the HP5432a nowadays? I have seen many smaller counters up to 2 Ghz within reach .. but 18 GHz? I'm not sure what "ham friendly" means, but HP has had many models over the years that will hit 18GHz. Some to look for are the 5340A (very old, but good), 5350, 5351, and the rest of that family. The 5345A is good, but expensive with appropriate plugins and measurement heads. And of course the 5342A is quite a good counter. Not HP, but EIP has made many excellent microwave counters over the years, and they're readily available. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP 8662A Power up - overvoltage shutdown
Hi Tony and George,
Yes I did build up the power supply in my HP 8663A with 4 Mean Well modules. Looking back on posts I made at the time, here is some info from this post:
I have now managed to put it all back together and test it with lab power supplies, and it seems to be?working. :) It draws about 2A for both?+20V and -10V, about 0,4A for -40V and more than 10A on?+5V. But
as my power supply for the 5V is only 10A, I'm not able to get 5V, its 4
point something, and then the instrument had some issues. I was able to
push the voltage up a bit more by adding another supply in parallel,
still not quit up to spec on the voltage, but closer, and the most of
the issues where gone.
In this post, is a list of the modules I selected, and also info on the 5.2V current consumption:
And I did replace the EPROMs (2516) with AT28C15, and the current
consumption on the 5V dropped from 12.18A to 11.66A, so not very much,
but some.
In this post there is some info and pictures of the modules I used:
Regards, Askild
Agreed. That would be extremely useful.
The -40V rail's operating spec max is 0.5A - so I can increase the current dummy load I have in place by quite a way yet - I'll try that next.
thanks
Tony
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Re: anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
The best microwave counters in my view are EIP 545 or 548 series , they are nice counters and you can get them reasonable priced , EIP used a YIG filter on the microwave input which protects the sampler
?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]>
On Behalf Of Tom Lee via groups.io
Sent: Wednesday, May 25, 2022 4:53 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
?
I've encountered a fair number of Autohet(Racal-Dana) microwave counters at hamfests and e-fleas for under $100. They're rack mount affairs, so not as convenient a form factor as your counter.? The more modern Racal-Dana 2101 is similar
in specs and form factor to your 5342A, so that might be worth considering. It does have a congenital design weakness, though -- the pushbuttons are crap. Replacing them is straightforward and cheap, but tedious.
If your needs would be satisfied with a top end of 14GHz or so (mine makes it to 16GHz, albeit with degraded sensitivity), you can build a divide-by-eight prescaler fairly easily, using the Hittite (now ADI) HMC363. They also have (or had) an eval board, if
you prefer pre-made over DIY. Couple that with a dirt-cheap 2GHz counter, and you'd be good to go.
--Cheers
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 5/25/2022 14:31, Samudra wrote:
Hi again, I am installing my HP 5342a counter, which is working, but it never came with GPIB i/f. I see the manual specifies option 001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP Input Assy.
Not wanting to spend more money into this beast (that much), are these parts unobtanium? I'm just wanting to automate certain set of measurements I plan to do. It's not do or die, just will take time to do them that's for sure.?
What's a reasonable, ham-friendly counter that does the same thing as the HP5432a nowadays? I have seen many smaller counters up to 2 Ghz within reach .. but 18 GHz??
?
|
Re: anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
Hi if you are looking for a counter with GPIB then the ?questions have to be What functions do you want ? Highest frequency ? How much is in the bank for it ? counters can do more than just count for Eg Phase lock a signal generator such as a HP8620 or a HP8350 Paul ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Samudra
Sent: 25 May 2022 22:32
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents ? Hi again, I am installing my HP 5342a counter, which is working, but it never came with GPIB i/f. I see the manual specifies option 001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP Input Assy.
Not wanting to spend more money into this beast (that much), are these parts unobtanium? I'm just wanting to automate certain set of measurements I plan to do. It's not do or die, just will take time to do them that's for sure.?
What's a reasonable, ham-friendly counter that does the same thing as the HP5432a nowadays? I have seen many smaller counters up to 2 Ghz within reach .. but 18 GHz??
|
Re: anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
I've encountered a fair number of Autohet(Racal-Dana) microwave
counters at hamfests and e-fleas for under $100. They're rack mount
affairs, so not as convenient a form factor as your counter.? The
more modern Racal-Dana 2101 is similar in specs and form factor to
your 5342A, so that might be worth considering. It does have a
congenital design weakness, though -- the pushbuttons are crap.
Replacing them is straightforward and cheap, but tedious.
If your needs would be satisfied with a top end of 14GHz or so (mine
makes it to 16GHz, albeit with degraded sensitivity), you can build
a divide-by-eight prescaler fairly easily, using the Hittite (now
ADI) HMC363. They also have (or had) an eval board, if you prefer
pre-made over DIY. Couple that with a dirt-cheap 2GHz counter, and
you'd be good to go.
--Cheers
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 5/25/2022 14:31, Samudra wrote:
toggle quoted message
Show quoted text
Hi again, I am installing my HP 5342a counter, which is working,
but it never came with GPIB i/f. I see the manual specifies option
001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP
Input Assy.
Not wanting to spend more money into this beast (that much), are
these parts unobtanium? I'm just wanting to automate certain set
of measurements I plan to do. It's not do or die, just will take
time to do them that's for sure.?
What's a reasonable, ham-friendly counter that does the same thing
as the HP5432a nowadays? I have seen many smaller counters up to 2
Ghz within reach .. but 18 GHz??
|
anyone have broken HP 5342a counter GPIB/HPIB i/f or know of equivalents
Hi again, I am installing my HP 5342a counter, which is working, but it never came with GPIB i/f. I see the manual specifies option 001, with P/N?05342-60019 HP/IB Assy and P/N 05342-60029 HP/IP Input Assy.
Not wanting to spend more money into this beast (that much), are these parts unobtanium? I'm just wanting to automate certain set of measurements I plan to do. It's not do or die, just will take time to do them that's for sure.?
What's a reasonable, ham-friendly counter that does the same thing as the HP5432a nowadays? I have seen many smaller counters up to 2 Ghz within reach .. but 18 GHz??
|
Re: E4407B RYTHM Repair / Replace
Hi Bob,
I am working on my own RYTHM with some success.
Can you do the following:
Insert CW at 4GHz, -20dBm.
Apply the following settings on E4407B:
Center freq 4GHz
Span 250MHz
Resolution BW 1MHz, Video BW 1MHz
Preselector Center: Front Panel Access: AMPLITUDE/Y Scale, Presel Center
Do you get a peak of reasonable amplitude at 4GHz after this?
If you do, then your YTF polynomial might be off. I am working on a procedure for this.
Best regards
|
Jared Cabot
Dave McGuire
Paul Bicknell