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Advice or a little driver help needed with an E5504A phase noise measurement system wand VXI digitizer

 

I have a VXI frame with an E1430A 10msps ADC.

I managed to get an older 32 bit version running on a windows 7 box (not my first choice but attempted path of least resistance to start with) but think I might be missing some files that came neither with the installer nor the prerequisites.

The E1430 asset control panel appears to ¡°connect¡± but everything is grayed out. No beat note is detected, and until it¡¯s calibrated it won¡¯t let me open the real time view which should just be a frequency domain output from the baseband after going through a low noise amplifier to drive the ADC.

I hesitate to even considering trying source a PCI-6111 card without knowing it too won¡¯t have a similar problem. The E1430 is technically better hardware anyway.

also: I¡¯m using either an E8491B or an NI VXI-MXI-2 in slot 0, so there¡¯s no E1406A/B to provider SCPI services for register based devices.

if anyone has access to an installer or recovery CD, I¡¯d be looking for the PC_Digitizer directory contents.
Re: 8340B with apparent phase lock problem #photo-notice

 

Thanks to all, I will investigate!
Re: HP 478A Thermistor head

 

¿ªÔÆÌåÓý

I had problems with a H75 option and I found a bad contact . I recommend to disassemble the unit carefully.?

Ing. Patricio A. Greco
Taller Aeron¨¢utico de Reparaci¨®n 1B-349
Organizaci¨®n de Mantenimiento Aeron¨¢utico de la Defensa OMAD-001
Gral. Mart¨ªn Rodr¨ªguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072

On 27 Feb 2023, at 17:18, Paul Bicknell <admin@...> wrote:

?

Hi thank you for the return Emails

I will do a frequency sweep but we are talking down by several ?Dbm at 100 Mhz

I am 99.9 % convinced it is a problem with the series cap

Regards Paul

?

From: [email protected] [mailto:[email protected]] On Behalf Of Patricio A. Greco via groups.io
Sent: 27 February 2023 21:27
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 478A Thermistor head

?

How much goes down ? Did you sweep the sensor ? The input reflection coefficient is good tho check it.?

Ing. Patricio A. Greco
Taller Aeron¨¢utico de Reparaci¨®n 1B-349
Organizaci¨®n de Mantenimiento Aeron¨¢utico de la Defensa OMAD-001
Gral. Mart¨ªn Rodr¨ªguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072



On 27 Feb 2023, at 11:24, Kenneth Harrison <bibpakak507@...> wrote:

?

Low end roll could be connector or bellows cap, guessing the later, but remote diagnostic is asking for trouble. Willing to help

?

On Mon, Feb 27, 2023, 7:43 AM Paul Bicknell <admin@...> wrote:

?

Hi? I have a HP 478A Thermistor head that works OK above 2 Ghz but reads low below 2 Ghz

I assume there is a problem with the internal series capacitor

Has anyone had a similar fault and is there any advice on a repair

?

Regards Paul


--
Ken H.

Re: HP 8594E low signal level indicated

 

Hi Greg,
Your recommendation of looking at first mixer output is still valid. Rik's SA is off by 30-40dB, few dB error in expected levels won't change debug approach. Block diagrams take some time to decipher, I spent quite some time on 8594E (tracking generator fix) and 8560E (YIG retrofit) block diagrams before.?

Ozan


On Mon, Feb 27, 2023 at 10:18 AM, Greg Muir wrote:

Ozan,

?

Boy, did I make a big fluff!!? Your recent comment regarding the erroneous IF frequency in my last post brought me to take another look at the stage gains/levels that I had mentioned in that post.? From that I realized that I had pulled up the wrong documentation that was for the 8590 instead of the 8594 analyzer.? The last section containing this information in that email should be disregarded.

?

The HP ¡°Service Guide - HP 8590 Series Analyzers Assembly-Level Repair¡± document (08590-90300) appears to contain all of the necessary level/frequency information shown in the block diagram (foldout 9-4) to be able to further diagnose the problem.? As Rik had commented it can be a little daunting to try to decipher the information across various analyzer models but with careful attention across each stage it can be a great help if one simply uses a highlighter marker to indicate the information that only applies to the 8594E unit.

?

My apologies for any misleading information.? I was dealing with too many tasks at the time.

?

Greg
Re: HP 478A Thermistor head

 

¿ªÔÆÌåÓý

Hi thank you for the return Emails

I will do a frequency sweep but we are talking down by several ?Dbm at 100 Mhz

I am 99.9 % convinced it is a problem with the series cap

Regards Paul

?

From: [email protected] [mailto:[email protected]] On Behalf Of Patricio A. Greco via groups.io
Sent: 27 February 2023 21:27
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 478A Thermistor head

?

How much goes down ? Did you sweep the sensor ? The input reflection coefficient is good tho check it.?

Ing. Patricio A. Greco
Taller Aeron¨¢utico de Reparaci¨®n 1B-349
Organizaci¨®n de Mantenimiento Aeron¨¢utico de la Defensa OMAD-001
Gral. Mart¨ªn Rodr¨ªguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072



On 27 Feb 2023, at 11:24, Kenneth Harrison <bibpakak507@...> wrote:

?

Low end roll could be connector or bellows cap, guessing the later, but remote diagnostic is asking for trouble. Willing to help

?

On Mon, Feb 27, 2023, 7:43 AM Paul Bicknell <admin@...> wrote:

?

Hi? I have a HP 478A Thermistor head that works OK above 2 Ghz but reads low below 2 Ghz

I assume there is a problem with the internal series capacitor

Has anyone had a similar fault and is there any advice on a repair

?

Regards Paul


--
Ken H.

Re: HP 478A Thermistor head

 

¿ªÔÆÌåÓý

How much goes down ? Did you sweep the sensor ? The input reflection coefficient is good tho check it.?

Ing. Patricio A. Greco
Taller Aeron¨¢utico de Reparaci¨®n 1B-349
Organizaci¨®n de Mantenimiento Aeron¨¢utico de la Defensa OMAD-001
Gral. Mart¨ªn Rodr¨ªguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072

On 27 Feb 2023, at 11:24, Kenneth Harrison <bibpakak507@...> wrote:

?
Low end roll could be connector or bellows cap, guessing the later, but remote diagnostic is asking for trouble. Willing to help

On Mon, Feb 27, 2023, 7:43 AM Paul Bicknell <admin@...> wrote:

?

Hi? I have a HP 478A Thermistor head that works OK above 2 Ghz but reads low below 2 Ghz

I assume there is a problem with the internal series capacitor

Has anyone had a similar fault and is there any advice on a repair

?

Regards Paul


--
Ken H.

Re: HP 8594E low signal level indicated

 

Excellent idea - should be one of the first things down.

Cheers!

Bruce

Quoting Rik Rasmussen <rikrasmussen@...>:

Today, I paused troubleshooting and recorded for backup, the Correction Constant Data using the forms in the service manual.
Re: HP 8594E low signal level indicated

 

Today, I paused troubleshooting and recorded for backup, the Correction Constant Data using the forms in the service manual.
Re: HP 8594E low signal level indicated

 

Good luck bug hunting !

Cheeras!

Bruce

Quoting "Greg Muir via groups.io" <big_sky_explorer@...>:

Ozan,

Boy, did I make a big fluff!! Your recent comment regarding the erroneous IF frequency in my last post brought me to take another look at the stage gains/levels that I had mentioned in that post. From that I realized that I had pulled up the wrong documentation that was for the 8590 instead of the 8594 analyzer. The last section containing this information in that email should be disregarded.

The HP ¡°Service Guide - HP 8590 Series Analyzers Assembly-Level Repair¡± document (08590-90300) appears to contain all of the necessary level/frequency information shown in the block diagram (foldout 9-4) to be able to further diagnose the problem. As Rik had commented it can be a little daunting to try to decipher the information across various analyzer models but with careful attention across each stage it can be a great help if one simply uses a highlighter marker to indicate the information that only applies to the 8594E unit.

My apologies for any misleading information. I was dealing with too many tasks at the time.

Greg
Re: HP 8594E low signal level indicated

 

Ozan,

?

Boy, did I make a big fluff!!? Your recent comment regarding the erroneous IF frequency in my last post brought me to take another look at the stage gains/levels that I had mentioned in that post.? From that I realized that I had pulled up the wrong documentation that was for the 8590 instead of the 8594 analyzer.? The last section containing this information in that email should be disregarded.

?

The HP ¡°Service Guide - HP 8590 Series Analyzers Assembly-Level Repair¡± document (08590-90300) appears to contain all of the necessary level/frequency information shown in the block diagram (foldout 9-4) to be able to further diagnose the problem.? As Rik had commented it can be a little daunting to try to decipher the information across various analyzer models but with careful attention across each stage it can be a great help if one simply uses a highlighter marker to indicate the information that only applies to the 8594E unit.

?

My apologies for any misleading information.? I was dealing with too many tasks at the time.

?

Greg
Re: HP 478A Thermistor head

Kenneth Harrison
 

Low end roll could be connector or bellows cap, guessing the later, but remote diagnostic is asking for trouble. Willing to help


On Mon, Feb 27, 2023, 7:43 AM Paul Bicknell <admin@...> wrote:

?

Hi? I have a HP 478A Thermistor head that works OK above 2 Ghz but reads low below 2 Ghz

I assume there is a problem with the internal series capacitor

Has anyone had a similar fault and is there any advice on a repair

?

Regards Paul


--
Ken H.
HP 478A Thermistor head

 

?

Hi? I have a HP 478A Thermistor head that works OK above 2 Ghz but reads low below 2 Ghz

I assume there is a problem with the internal series capacitor

Has anyone had a similar fault and is there any advice on a repair

?

Regards Paul
Re: HP 8753D Opt. 006 VNA YTO Problem

 

alex@... writes:

I have a 8753D VNA with Option 006. Unfortunately it stopped working and shows "No IF found: Check R Input Level". The problem is only at 3 to 3.8 GHz output frequency range.

I did all the tests according to the service manual "Source Troubleshooting" and found that:
- Service Menu Test "48" fails
- Source Tune Mode: There is no output signal from the YTO at the low end around 3 and 3.8 GHz

As I already found in other group topics it is a known problem that these YTOs fails at the low end. I tried to buy a replacement one and found one at alltest instruments. I bought it for 700 USD.

Unfortunately if I change the YTO to the "new" one, there is absolutely no output signal over the whole frequency range. If I put my defective YTO back in the VNA it works except the known problem from 3 to 3.8 GHz, off course.

I think the replacement one from alltest is a bad device. Is there anything I can check to confirm this?
You can check test the YTO on the bench, or measure the YTO signal level
directly at the YTO, leaving it in circuit so that your 8753 drives it
for you. If you bench test it, make sure you know the proper signals to
feed it and be careful (use current and voltage limits etc). It should
be possible to figure out the correct drive signals by looking at the
schematic. This video might also be of some help:



Another thing to note is that YTO output power tends to be quite
high. Depending on the spectrum analyzer you're using to measure it,
it's probably not a bad idea to throw a 20dB attenuator in line with the
output.

It's a bit surprising that AllTest would have given you a bad part. They
charge a significant premium to other places. But, from what I can tell,
they're one of the few places that does proper tests on what they
sell. Maybe I need to revise that impression. Anyway, let us know what
you find.

Good luck,
Matt
Re: HP 8753D Opt. 006 VNA YTO Problem

 

Hallo Alex,
Unfortunately I can't give you great advice, but will say the following:

1)? When you replace certain parts of the instrument, you have to go through a full recalibration procedure to bring things into specification.? This includes especially the detectors & source module.? While I doubt that this is your issue, you may try it.? Once you get the hang of the procedure, it's not too bad.? Instructions are in the service manual.? You will however need a power meter and two power sensors (8141A and 8142A) as well as a few special cables (8120-4779).? You save the EPROM data to a 3.5" floppy (and probably do two just for safety) and then you can recalibrate the whole instrument.? Again, unlikely to fix your issue, but possibly worth a try.

2)? When I had an issue with my source module on a parts unit that I purchase, I purchased another parts unit on ebay for $1000 and managed to get lucky enough.? I used the parts that I needed and then split up the remaining working parts from the unit selling them individually on ebay to make back my $1000.? It was a bit of a pain, but resulted in essentially a "free" fix.

Based on what you are describing, I highly suspect something in the source module, but beyond that I'm going to have to defer to the experts on this one.? Viel gl¨¹ck!.

/Scott
Re: HP 8753D Opt. 006 VNA YTO Problem

Kenneth Harrison
 

One way to verify is to insert a directional coupler and measure the output of the yig at the coupled port. However, doing the double swap as you did should be proof enough. You got a bad one. It happens?


On Mon, Feb 27, 2023, 2:42 AM <alex@...> wrote:
Hi,

I have a 8753D VNA with Option 006. Unfortunately it stopped working and shows "No IF found: Check R Input Level". The problem is only at 3 to 3.8 GHz output frequency range.

I did all the tests according to the service manual "Source Troubleshooting" and found that:
- Service Menu Test "48" fails
- Source Tune Mode: There is no output signal from the YTO at the low end around 3 and 3.8 GHz

As I already found in other group topics it is a known problem that these YTOs fails at the low end. I tried to buy a replacement one and found one at alltest instruments. I bought it for 700 USD.

Unfortunately if I change the YTO to the "new" one, there is absolutely no output signal over the whole frequency range. If I put my defective YTO back in the VNA it works except the known problem from 3 to 3.8 GHz, off course.

I think the replacement one from alltest is a bad device. Is there anything I can check to confirm this?

best regards
Alex


--
Ken H.
HP 8753D Opt. 006 VNA YTO Problem

 

Hi,

I have a 8753D VNA with Option 006. Unfortunately it stopped working and shows "No IF found: Check R Input Level". The problem is only at 3 to 3.8 GHz output frequency range.

I did all the tests according to the service manual "Source Troubleshooting" and found that:
- Service Menu Test "48" fails
- Source Tune Mode: There is no output signal from the YTO at the low end around 3 and 3.8 GHz

As I already found in other group topics it is a known problem that these YTOs fails at the low end. I tried to buy a replacement one and found one at alltest instruments. I bought it for 700 USD.

Unfortunately if I change the YTO to the "new" one, there is absolutely no output signal over the whole frequency range. If I put my defective YTO back in the VNA it works except the known problem from 3 to 3.8 GHz, off course.

I think the replacement one from alltest is a bad device. Is there anything I can check to confirm this?

best regards
Alex
Re: 9000 series 700 with basic in lieu of series 300 ?

 

It is possible to run HPBASIC/WS based software on 9000 series 700 machines, but there are some caveats/limitations, I listed some below.

First, HPBASIC/WS versions are for use on Motorola based processor systems (i.e. 9000 series 200, 300, 400), you will need HPBASIC/UX for use on PA-RISC based systems (i.e. 9000 series 700 family).

It will depend on each software package as to whether or not it will work with either or both HPBASIC/WS and HPBASIC/UX.

The software may have CSUBs, which are compiled subprograms that are hardware and HPBASIC version specific.

HPBASIC/UX can convert/run stored HPBASIC/WS PROG files, but there can be issues with the comparison of REAL numbers since HPBASIC/WS uses 80bit Floating-Point vs HPBASIC/UX using 64bit IEEE Floating-Point format.

Super tight loops in HPBASIC/WS (i.e. infinite loops with no internal statements) will give HP-UX grief since the OS won't have time to "breathe".? Insert a WAIT .01 statement to allow the OS a chance to run needed processes.

Note: For more information about HPBASIC including WS vs UX versions see the HPBASIC Documentation (from TAMS) that I have uploaded into the VintHP groups_io files section.

Hopefully someone with more recent experience with the 11990A software can weigh in as to whether you can use HPBASIC/UX...
Re: 8340B with apparent phase lock problem #photo-notice

 

First place I would look (after checking power supply) would be the YP loop - low signal into the loop will cause PLL to unlock.

Also do a CW scan using RPG and note if there are particular places where it looses lock.

Cheers!

Bruce

Quoting Four Designs Company <fourdesigns@...>:

My 8340B seems to have phase lock problem. There are no self test failures, and all the <SHIFT> front panel diags pass as well.
The 10 MHz ref is clean, the power supplies are clean, so I am not sure where to look next.

The spurs seen in the picture randomly appear at any frequency.

Thanks for any suggestions.
Re: HP transistor equivalent for 1854-0247?

 

Thank you all!


On Sun, 26 Feb 2023 at 19:17, Kenneth Harrison <bibpakak507@...> wrote:
1854-0247
TI SA-6325
2N3866A

On Sat, Feb 25, 2023, 8:57 AM Glenn Little <glennmaillist@...> wrote:
What is the model number?

Glenn

On 2/25/2023 11:19 AM, Tony wrote:
>From an HP sig gen 50 MHz oscillator - does anybody know a type or equivalent for a?1854-0247?

I can't find it in any of the Xref documents.

thanks

Tony 

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv@...    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

--
Ken H.

--

Re: 8340B with apparent phase lock problem #photo-notice

Kenneth Harrison
 

YIG


On Sun, Feb 26, 2023, 2:32 PM Four Designs Company <fourdesigns@...> wrote:
My 8340B seems to have phase lock problem. There are no self test failures, and all the <SHIFT> front panel diags pass as well.
The 10 MHz ref is clean, the power supplies are clean, so I am not sure where to look next.

The spurs seen in the picture randomly appear at any frequency.

Thanks for any suggestions.


--
Ken H.
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