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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.
8340B with apparent phase lock problem #photo-notice

 

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.

8340B phase lock.MOV
8340B phase lock.MOV

Re: HP 8594E low signal level indicated

 

One thing to be careful of when using the "tiny" tools is FREQUENCY ACCURACY. You will be working with some narrow bandwidth components and an off frequency signal might give (apparently) incorrect levels.

Probably best to check frequency with a good counter before assuming the data you collect is good.

Cheers!

Bruce

Quoting "John Gord via groups.io" <johngord@...>:

Rik,
The push-on coax connectors are type SMB.
--John Gord

On Sun, Feb 26, 2023 at 01:11 PM, Rik Rasmussen wrote:


I just want to say thanks for all the info and suggestions.? Working my
way down the chain looking at the signal levels using the tinySA Ultra,
and using it's signal generator function to inject signal.

In addition to being hard to get to, some of the SMA connectors are
stubborn to break loose, but turn easily once they give. I want to be very
careful not to damage any connectors.

One question I have is, some of the connectors on cards are push on. Look
a little smaller than an SMA. What type connectors are they?

Thank guys for everything.

Rik Rasmussen WA4BAN

On Sun, Feb 26, 2023, 2:22 PM Mark Litwack < mlitwack@... >
wrote:

I was also going to point out the 8594E has no YTF or SYTF.? Unfortunately
HP tried to re-use the same block diagram for too many models.

I wanted to add that cross-referencing the assembly numbers (e.g. A3A6)
with the Assembly-Level Replaceable Parts list in table 12-5 can help
clear up ambiguities since it lists exactly what parts and assemblies
exist within each model.

-mark
Re: HP 8594E low signal level indicated

 

Rik,
The push-on coax connectors are type SMB.
--John Gord


On Sun, Feb 26, 2023 at 01:11 PM, Rik Rasmussen wrote:
I just want to say thanks for all the info and suggestions.? Working my way down the chain looking at the signal levels using the tinySA Ultra, and using it's signal generator function to inject signal.
?
In addition to being hard to get to, some of the SMA connectors are stubborn to break loose, but turn easily once they give. I want to be very careful not to damage any connectors.
?
One question I have is, some of the connectors on cards are push on. Look a little smaller than an SMA. What type connectors are they?
?
Thank guys for everything.
?
Rik Rasmussen WA4BAN?

On Sun, Feb 26, 2023, 2:22 PM Mark Litwack <mlitwack@...> wrote:
I was also going to point out the 8594E has no YTF or SYTF.? Unfortunately HP tried to re-use the same block diagram for too many models.

I wanted to add that cross-referencing the assembly numbers (e.g. A3A6) with the Assembly-Level Replaceable Parts list in table 12-5 can help clear up ambiguities since it lists exactly what parts and assemblies exist within each model.

-mark
Re: HP 8594E low signal level indicated

 

I just want to say thanks for all the info and suggestions.? Working my way down the chain looking at the signal levels using the tinySA Ultra, and using it's signal generator function to inject signal.

In addition to being hard to get to, some of the SMA connectors are stubborn to break loose, but turn easily once they give. I want to be very careful not to damage any connectors.

One question I have is, some of the connectors on cards are push on. Look a little smaller than an SMA. What type connectors are they?

Thank guys for everything.

Rik Rasmussen WA4BAN?

On Sun, Feb 26, 2023, 2:22 PM Mark Litwack <mlitwack@...> wrote:
I was also going to point out the 8594E has no YTF or SYTF.? Unfortunately HP tried to re-use the same block diagram for too many models.

I wanted to add that cross-referencing the assembly numbers (e.g. A3A6) with the Assembly-Level Replaceable Parts list in table 12-5 can help clear up ambiguities since it lists exactly what parts and assemblies exist within each model.

-mark

Re: HP 8590 e series card cage

 

¿ªÔÆÌåÓý

Ken,

Will let you know how I get on finding the connect female connector

?

?

Mike

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Kenneth Harrison
Sent: 26 February 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8590 e series card cage

?

Could not find 08590-60532, but the 1251-8912 is TE Connectiy 5-534204-5

?

Hope this helps

?

On Sun, Feb 26, 2023, 11:47 AM Mike Lockley via <mikelockley=[email protected]> wrote:

Ken,

Thanks ,as follows.

08590-60532

I believe that the connector on the card cage is the male and is a Amphenol? 30x2

The part number from the CLIP is? connector HP part 1251-8912? -this will be the female end as in the other card cage PCB¡¯s(this is what I need to get an extender card made up)

I have done a lot of diagnosing work on the Narrow BW pcb and I believe that with a suitable extender card and my existing work I may be able to fix at least mine and possible others.

?

Regards

Mike g4wam

?

?

?

?

?

?

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Kenneth Harrison
Sent: 26 February 2023 19:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8590 e series card cage

?

Get me the board part number, and I will see what I can find?

?

On Sun, Feb 26, 2023, 10:56 AM Mike Lockley via <mikelockley=[email protected]> wrote:

Does anyone out there know what 30x2 connector fits into the card cage connector receptacle on the HP 8590 series ( and probably others) SA ?
I have a option 130 narrow BW pcb which i am working on??

thanks
Mike g4wam





??


--
Ken H.


--
Ken H.

Re: HP 8590 e series card cage

Kenneth Harrison
 

Could not find 08590-60532, but the 1251-8912 is TE Connectiy 5-534204-5

Hope this helps

On Sun, Feb 26, 2023, 11:47 AM Mike Lockley via <mikelockley=[email protected]> wrote:

Ken,

Thanks ,as follows.

08590-60532

I believe that the connector on the card cage is the male and is a Amphenol? 30x2

The part number from the CLIP is? connector HP part 1251-8912? -this will be the female end as in the other card cage PCB¡¯s(this is what I need to get an extender card made up)

I have done a lot of diagnosing work on the Narrow BW pcb and I believe that with a suitable extender card and my existing work I may be able to fix at least mine and possible others.

?

Regards

Mike g4wam

?

?

?

?

?

?

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Kenneth Harrison
Sent: 26 February 2023 19:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8590 e series card cage

?

Get me the board part number, and I will see what I can find?

?

On Sun, Feb 26, 2023, 10:56 AM Mike Lockley via <mikelockley=[email protected]> wrote:

Does anyone out there know what 30x2 connector fits into the card cage connector receptacle on the HP 8590 series ( and probably others) SA ?
I have a option 130 narrow BW pcb which i am working on??

thanks
Mike g4wam





??


--
Ken H.


--
Ken H.
Re: Agilent N5230A Power Supply (0950-4599) repair: Looking for Schematic & general repair advice

Kenneth Harrison
 

Can't provide too much, but typical failure on these is an ectrolytic near the AC input. It will cause the symptoms described.??


On Fri, Jan 27, 2023, 5:40 AM Scott Vance via <scott_l_vance=[email protected]> wrote:
I have an N5230A PNA-L network analyzer that I'm trying to fix.? I am told that it was plugged in and running (idle) for perhaps a year.? According to the story, someone powered it down, moved it, and then it failed to power up again.

Basic symptoms:
I am seeing no pilot light (red) on the back when it is plugged in.? I have tested the power cord and it is OK.? I am seeing nothing lit on the front panel (orange light) and no output to the probe power supplies on the front panel.? When I push the power button nothing happens - no fans, nothing.? When I disconnect the power supply from the rest of the unit and open it up, it has "TP1" and "TP2" clearly marked on the board.? When I plug it in (without connection to the rest of the instrument) I am reading 0.125VAC on test point 1.? Nothing on test point 2.? I don't have a repair manual, but I would generally assume that the voltages at these points should be higher.

Questions:
1)? I'm assuming catastrophic power supply failure.? Is there anything else that could cause these symptoms?
2)? Does anyone have a schematic for the 0950-4599 power supply or anything similar that could help me to understand this better?
3)? I understand that when you plug in and work on a power supply that it's a very good idea to have a "Variable isolation transformer", something like a?Sencore PR570.? Any recommendations on this that won't break the bank?
4)? Can anyone recommend a good book, website, or other resource for understanding and troubleshooting power supplies?? I've come across a few videos from "The Signal Path" on youtube, but other than that I'm not well trained in this area.? I'm used to looking for blown capacitors and shorted transistors, but due to the fact that I'm getting absolutely nothing out of this I'm kind of thinking that it may be related to the switching IC in one of the very early phases of the circuit.? I'm assuming that the best course is to get a variable isolation transformer and then start probing the voltages with a multimeter and oscilloscope starting at the AC input and working my way deeper into the supply until I find something that is non-functional.? Is this the best way forward?

Any other general (or specific) advice on this topic is highly appreciated.


--
Ken H.
Re: HP 8590 e series card cage

 

¿ªÔÆÌåÓý

Ken,

Thanks ,as follows.

08590-60532

I believe that the connector on the card cage is the male and is a Amphenol? 30x2

The part number from the CLIP is? connector HP part 1251-8912? -this will be the female end as in the other card cage PCB¡¯s(this is what I need to get an extender card made up)

I have done a lot of diagnosing work on the Narrow BW pcb and I believe that with a suitable extender card and my existing work I may be able to fix at least mine and possible others.

?

Regards

Mike g4wam

?

?

?

?

?

?

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Kenneth Harrison
Sent: 26 February 2023 19:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8590 e series card cage

?

Get me the board part number, and I will see what I can find?

?

On Sun, Feb 26, 2023, 10:56 AM Mike Lockley via <mikelockley=[email protected]> wrote:

Does anyone out there know what 30x2 connector fits into the card cage connector receptacle on the HP 8590 series ( and probably others) SA ?
I have a option 130 narrow BW pcb which i am working on??

thanks
Mike g4wam





??


--
Ken H.

Re: HP 8591A 60x2 connector HP

 

Dear Mike,

No doubt I either have the?60x2 connector or can source one quickly.??

Please contact me today at WA1ESO@...

John WA1ESO
Re: HP 8594E low signal level indicated

 

I was also going to point out the 8594E has no YTF or SYTF.? Unfortunately HP tried to re-use the same block diagram for too many models.

I wanted to add that cross-referencing the assembly numbers (e.g. A3A6) with the Assembly-Level Replaceable Parts list in table 12-5 can help clear up ambiguities since it lists exactly what parts and assemblies exist within each model.

-mark
Re: HP 8594E low signal level indicated

 

The block diagram in the service manual is confusing because it includes many items that are not in my unit. So, I am pausing in my troubleshooting to create my own block diagram to reflect how my unit is configured.
Re: HP transistor equivalent for 1854-0247?

Kenneth Harrison
 

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: HP 8594E low signal level indicated

 

On Sun, Feb 26, 2023 at 09:43 AM, Rik Rasmussen wrote:
When I said I was feeding the First Converter, that was apparently icorrect. I was looking at the wrong block diagram. I am now looking at the block diagram for the 8594E. The block diagram does include the tracking generator although my unit does not have that option.

After looking at the output of the attenuator and checking that it is stepping correctly, I then inserted the CAL OUT signal directly to the next stage after the attenuator. According to the block diagram that is a "SWITCHED YTF". Feeding at that point I am seeing a low signal on the display and reading is very low.
------
Hi Rik,
There is no YTF on a 8594E, block diagram shows that with a dotted box. Mixer is also single band.?

Greg's suggestion of looking at after the first mixer is good. One slight correction is on a 8594E first IF is at 3.9214GHz. If the power is low at that point it could be bad mixer or it could be low LO power coming from YIG oscillator.

Do you have a power meter or a way to measure power at ~ 4GHz?

I recommend an ESD safe work bench and a proper ground wrist band as this area is sensitive to ESD.?
Ozan
Re: HP 8590 e series card cage

Kenneth Harrison
 

Get me the board part number, and I will see what I can find?


On Sun, Feb 26, 2023, 10:56 AM Mike Lockley via <mikelockley=[email protected]> wrote:
Does anyone out there know what 30x2 connector fits into the card cage connector receptacle on the HP 8590 series ( and probably others) SA ?
I have a option 130 narrow BW pcb which i am working on??

thanks
Mike g4wam





??


--
Ken H.
HP 8590 e series card cage

 

Does anyone out there know what 30x2 connector fits into the card cage connector receptacle on the HP 8590 series ( and probably others) SA ?
I have a option 130 narrow BW pcb which i am working on??

thanks
Mike g4wam





??
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