It¡¯s pulse drive. There are MM74HC123 dual monostable multivibrators doing the pulsing and the ULN2003A provides the high current drive off of those pulses. I have an issue with some of this on mine but I don¡¯t have a scope at home till Thursday at best :(
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Don -
I did not see any of the leaf switches (which interrupt the current after switching) in this attenuator - do they rely on a current limit to protect the coil or is the drive a pulse ? Did I simply miss something? Is this version of the attenuator more reliable in your opinion?
Cheers!
Bruce
Quoting "Don Bitters via groups.io" <donbitters@...>:
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The attenuator drive is on A16 brd. in the RF section. It is a current drive to the solenoids in the attenuator. The attenuator is 10dB, 20dBa, 20dBb, 20dBc sections.
The attenuator steps are:
0dB = bypass all pads
10dB = 10dB in, bypass all 20dB pads
20dB = bypass 10dB pad, 20dBa in, bypass 20dBb, 20dBc pads
30dB = 10dB, 20dBa in, bypass 20dBb, 20dBc pads
40dB = bypass 10dB, 20dBa pads, 20dBb in, 20dB in
50dB = bypass 20dBa, 10dB in, 20dBb in, 20dB in
60dB = bypass 10dB, all 20dB pads in
70dB = all pads in
The pads inside the attenuator are from input to output 10dB, 20dBa, 20dBb, 20dBc.
The truth table is in the RF section manual and on the A16 schematic.
Don Bitters
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The attenuator drive is on A16 brd. in the RF section. It is a current drive to the solenoids in the attenuator. The attenuator is 10dB, 20dBa, 20dBb, 20dBc sections.
The attenuator steps are:
0dB = bypass all pads
10dB = 10dB in, bypass all 20dB pads
20dB = bypass 10dB pad, 20dBa in, bypass 20dBb, 20dBc pads
30dB = 10dB, 20dBa in, bypass 20dBb, 20dBc pads
40dB = bypass 10dB, 20dBa pads, 20dBb in, 20dB in
50dB = bypass 20dBa, 10dB in, 20dBb in, 20dB in
60dB = bypass 10dB, all 20dB pads in
70dB = all pads in
The pads inside the attenuator are from input to output 10dB, 20dBa, 20dBb, 20dBc.
The truth table is in the RF section manual and on the A16 schematic.
Don Bitters
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Re: 8490XX step attenuator mating connector
Hello JF ,
It is used on the driver cord 11764-60004 ( but I don't have the parts list of this cord... )
73s Eric
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Re: 8490XX step attenuator mating connector
It looks like IDC - should be easy to find.
Cheers@!
Bruce
Quoting "jfphp via groups.io" <jfphp@...>:
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It is rectangular. The Viking connector is for the 4/18 Ghz green old attenuators or the driver box 11713A On Monday, March 13, 2023, 06:30:33 PM GMT+1, Bruce <bruce@...> wrote:
Viking ???? If it is round, it is probably Viking
Quoting "jfphp via groups.io" <jfphp@...>:
Hello,
I am looking for the commercial brand/reference of the female 10?
pins dip female connector mating the male connector of the step?
attenuator.
Thank you.
|
Re: 8490XX step attenuator mating connector
I think that is an IDC header connector 10 pin with 2.54mm pitch.
Can you measure the distance between pins?
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Show quoted text
On 13/03/2023 18:44, jfphp via groups.io wrote: It is rectangular. The Viking connector is for the 4/18 Ghz green old
attenuators or the driver box 11713A
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Re: 8490XX step attenuator mating connector
It is rectangular. The Viking connector is for the 4/18 Ghz green old attenuators or the driver box 11713A On Monday, March 13, 2023, 06:30:33 PM GMT+1, Bruce <bruce@...> wrote:
Viking ???? If it is round, it is probably Viking
Quoting "jfphp via groups.io" <jfphp@...>:
> Hello,
> I am looking for the commercial brand/reference of the female 10?
> pins dip female connector mating the male connector of the step?
> attenuator.
> Thank you.
>
>
>
|
Re: 8490XX step attenuator mating connector
Viking ??? If it is round, it is probably Viking
Quoting "jfphp via groups.io" <jfphp@...>:
toggle quoted message
Show quoted text
Hello,
I am looking for the commercial brand/reference of the female 10 pins dip female connector mating the male connector of the step attenuator.
Thank you.
|
Re: Tracking Generator Board 5062-8282 CLIP
I have a CLIP for the 5062-8232 LODA control, and the 5063-0635 Tracking generator control.
They are both part of the 8590E-L-CLIP scan that I purchased from Artek media.
Talk to them I'm sure they can help. ?
The scans they sell are worth the money, better than anything you will find at Keysight or other 'free' places...
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HP 85865B Signal Monitoring Software for HP 8566B, 8567A, 8568B, 71000 Modular Series, and 8562A Portable
Hello all,
I am new here and this will be my first post. I discovered the beauty of HP meters a few years ago. Since then I have built up a collection. I want to control my devices via HP-IB and I use a HP85B with EBTKS card. Now I have a HP9000/310 and I am looking for the HP 85865B signal monitoring software for my HP8568B and HP8566B. I would put the HP catalog page in the attachment.?
?
Who knows this software and maybe still has original disks?
?
In general I am interested in any software for HP devices.
?
Thanks and many greetings
Rudolf
?
|
8490XX step attenuator mating connector
Hello,
I am looking for the commercial brand/reference of the female 10 pins dip female connector mating the male connector of the step attenuator.
Thank you.
|
Re: 5086-7337 *Yig Oscillator issue*
Hi do you have the service manual with the ?CCT¡¯s ??? If not you will find the A version in the files on this site including the CCT By the way you are working on an A version are all the parts you have used for an A version I don¡¯t think it is an issue but worth checking ?
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From: [email protected] [mailto:[email protected]] On Behalf Of RubenRubio
Sent: 13 March 2023 09:37
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 5086-7337 *Yig Oscillator issue* ? I made this plugin out ot two separated parts sets: one comprises everything but A1, A2, keyboard and front panel. The second set includes the boards and mechanical parts I needed to complete the puzzle plus some extra chassis parts, SYTM, PMI and other microcircuits, also extra A3 board without ROMs and A10 motherboard.
My point is that the YO comes with it's appropiate resistors in A8, I've checked that.
Paul: I uploaded the OSM that I have, don't know what CCT or those aligner PCBs are, sorry. As I told in the earlier posts in this very thread, there's is no output?neither on the auxiliary output nor on the direct output of the oscillator. And the signal and supplies are present in the YO board test points.?In my eagerness to check the whole set, I have referred back to the YO driver.?
I'll read the manual again looking for that mA/Hz table and more troubleshooting info. Also redundant check to be sure.
Regards,
Ruben Attachments:
|
Re: 5086-7337 *Yig Oscillator issue*
When I was about 22 I rebuilt a 8620 Sweeper that arrived in kit form then found a 2 to 18 Ghz plug in
Option HO so it went to 22 Ghz so this was more difficult to set up and took several days to get working
having to set up the 2 yig driver borders please note the borders where originally matched the yigs in the unit
NB the sweeper mainframe power supply must be within the limits including the ripple before you set up any Yigs
so sorry the answer to your question could the wrong yig driver PCB stop the yig from working is YES
concentrating on the master yig you have to go through the set up procedure when this is working to within specification limits you can go onto the multiplier chain
HP supplied the replacement yig for the 18 Ghz plug in used in the 8620 it came with a new driver PCB also a new SOT resistor for the FM modulation sensitivity
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Bruce Sent: 13 March 2023 02:33 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] 5086-7337 *Yig Oscillator issue* Paul - In your opinion - Would the difference between boards be enough to cause no output? Cheers! Bruce Quoting Paul Bicknell <admin@...>: Hi Ruben
I thought I asked this question but apparently not on looking at the
history , sorry if I am going over old ground
You have made the unit out of 2 units and no output on the Aux socket
on the back panel the big question hear again from memory
But is the yig PCB the matching one for the yig in the sweeper as they
are individually set to the yig and as a service item supplied as PCB
and YIG together
When you have the Maine yig giving output
There should be a lineariser PCB with lots of pots on it this should
be the yig multiplier PCB again you MUST have the matching board as
they are individually set up to the Yig
The PCB can be realigned but it could take about 3 hours the first
time you do it with all the messing about with fixed resisters etc
I assume you have the Full Service manual including CCT
From: [email protected]
[mailto:[email protected]] On Behalf Of
RubenRubio
Sent: 19 February 2023 12:18
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] 5086-7337 *Yig Oscillator
issue*
Hello everyone!
Although this topic belongs to my 8350B restoration thread I did
almost a year ago, I want to imprint some relevance. Shortly, my 8350B
mainframe doesn¡¯t have main transformer. Instead of that I feed it
with three external sources.
These days I managed to get a 83592A plugin in two separated parts
sets. I have put them together and after some power supply issues
(classic shorted tantalum), there¡¯s no errors displayed. But no RF
coming out. Unleveled LED lits in the front panel. Also no RF at the
rear aux output, nor at the exit of YO itself (God shake! it¡¯s tricky
to access microcircuits!).
Following the signal path and troubleshooting notes on the manual, I
check that the +5, +20, -40 supplies for the YO are present. Also the
ON -10 volt signal and the M composite signal on scope. At first
glance, G bias signal (which should be -2 volt) was almost 0. I check
the associated components and after turning a pot, -2 volt come back.
Still no signal at the output of the oscillator :(
Is there any other way to check the YO before officially declaring it dead?
Regards,
Ruben
|
File /3D RP files/HP TYPE II FRONT FOOT.STEP uploaded
#file-notice
The following files and folders have been uploaded to the Files area of the [email protected] group.
By: ChrisBeee <chrisbeee@...>
Description:
This file can be used to print your own Hewlett Packard Type II front feet. This file is a metric 1:1 model, please consider material shrinkage when using your specific material!
|
I created a CAD model of the Type II front foot and added it to the files section (added the '3D RP files' folder and placed it there). A rear foot model (minus the rubber insert) will follow soon.
Chris
|
Re: 5086-7337 *Yig Oscillator issue*
I made this plugin out ot two separated parts sets: one comprises everything but A1, A2, keyboard and front panel. The second set includes the boards and mechanical parts I needed to complete the puzzle plus some extra chassis parts, SYTM, PMI and other microcircuits, also extra A3 board without ROMs and A10 motherboard.
My point is that the YO comes with it's appropiate resistors in A8, I've checked that.
Paul: I uploaded the OSM that I have, don't know what CCT or those aligner PCBs are, sorry.
As I told in the earlier posts in this very thread, there's is no output?neither on the auxiliary output nor on the direct output of the oscillator. And the signal and supplies are present in the YO board test points.?In my eagerness to check the whole set, I have referred back to the YO driver.?
I'll read the manual again looking for that mA/Hz table and more troubleshooting info. Also redundant check to be sure.
Regards,
Ruben
|
Re: Agilent E3610A Operator Faux Pas or Production Change
Unfortunately this video is 11 years old so possibly too late but Dave at EEVblog had the unit you need and vice versa:?
His power supply had a Magtek 9100-4959.? You could have made a swap, except for that cost of shipping problem.? Thought the video might be entertaining if it hasn't already been mentioned.
Clay
|
Re: 5086-7337 *Yig Oscillator issue*
Paul - In your opinion - Would the difference between boards be enough to cause no output? Cheers! Bruce Quoting Paul Bicknell <admin@...>:
Hi Ruben
I thought I asked this question but apparently not on looking at the history , sorry if I am going over old ground
You have made the unit out of 2 units and no output on the Aux socket on the back panel the big question hear again from memory
But is the yig PCB the matching one for the yig in the sweeper as they are individually set to the yig and as a service item supplied as PCB and YIG together
When you have the Maine yig giving output
There should be a lineariser PCB with lots of pots on it this should be the yig multiplier PCB again you MUST have the matching board as they are individually set up to the Yig
The PCB can be realigned but it could take about 3 hours the first time you do it with all the messing about with fixed resisters etc
I assume you have the Full Service manual including CCT
From: [email protected] [mailto:[email protected]] On Behalf Of RubenRubio
Sent: 19 February 2023 12:18
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] 5086-7337 *Yig Oscillator issue*
Hello everyone!
Although this topic belongs to my 8350B restoration thread I did almost a year ago, I want to imprint some relevance. Shortly, my 8350B mainframe doesn¡¯t have main transformer. Instead of that I feed it with three external sources.
These days I managed to get a 83592A plugin in two separated parts sets. I have put them together and after some power supply issues (classic shorted tantalum), there¡¯s no errors displayed. But no RF coming out. Unleveled LED lits in the front panel. Also no RF at the rear aux output, nor at the exit of YO itself (God shake! it¡¯s tricky to access microcircuits!).
Following the signal path and troubleshooting notes on the manual, I check that the +5, +20, -40 supplies for the YO are present. Also the ON -10 volt signal and the M composite signal on scope. At first glance, G bias signal (which should be -2 volt) was almost 0. I check the associated components and after turning a pot, -2 volt come back.
Still no signal at the output of the oscillator :(
Is there any other way to check the YO before officially declaring it dead?
Regards,
Ruben
|
Re: 5086-7337 *Yig Oscillator issue*
Hi Ruben ? I thought I asked this question but apparently not on looking at the history , sorry if I am going over old ground You have made the unit out of 2 units and no output on the Aux socket on the back panel the big question hear again from memory But is the yig PCB the matching one for the yig in the sweeper as they are individually set to the yig and as a service item ?supplied as PCB and YIG together When you have the Maine yig giving output There should be a lineariser PCB with lots of pots on it this should be the yig multiplier PCB again you MUST have the matching board as they are individually set up to the Yig The PCB can be realigned but it could take about 3 hours the first time you do it with all the messing about with fixed resisters etc I assume you have the Full Service manual including CCT ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of RubenRubio
Sent: 19 February 2023 12:18
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] 5086-7337 *Yig Oscillator issue* ? Hello everyone!
Although this topic belongs to my 8350B restoration thread I did almost a year ago, I want to imprint some relevance. Shortly, my 8350B mainframe doesn¡¯t have main transformer. Instead of that I feed it with three external sources.
These days I managed to get a 83592A plugin in two separated parts sets. I have put them together and after some power supply issues (classic shorted tantalum), there¡¯s no errors displayed.?But no RF coming out.?Unleveled LED lits in the front panel.?Also no RF at the rear aux output, nor at the exit of YO itself (God shake! it¡¯s tricky to access microcircuits!).
Following the signal path and troubleshooting notes on the manual, I check that the +5, +20, -40 supplies for the YO are present. Also the ON -10 volt signal and the M composite signal on scope. At first glance, G bias signal (which should be -2 volt) was almost 0. I check the associated components and after turning a pot, -2 volt come back.
Still no signal at the output of the oscillator :(?
Is there any other way to check the YO before officially declaring it dead?
Regards,
Ruben
|
Re: 5086-7337 *Yig Oscillator issue*
Sorry I haven¡¯t looked at the manual but the Aux output on the rear of the plugin should be the raw Yig output before it goes to the Multiplier / Yig filter
As I often use this output to phase lock the sweeper when in CW mode from memory it goes to an amplifier then to the Multiplier / Yig filter
I have had the Amplifier fail in the past and HP kindly repaired it for me it was a special option plug in (22 Ghz) the other problem is the Multiplier / Yig filter Bias and tracking
In the past I have use 2 or 3 decade resister boxes to set up tracking
Paul
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Bruce Sent: 12 March 2023 23:44 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] 5086-7337 *Yig Oscillator issue* Ruben - Confirmation should not be too difficult. Confirm: 1) The YIG main coil CURRENT is consistent with the frequency - somewhere in the service literature there will be a specification of ma/GHz 2) The remaining volgages for the YIG Oscillator and Amp voltages - should be listed in the service literature. 3) The path from the YIG to where ever you are measuring the RF is intact and not shorted or open - probably reasonable to disconnect the YIG output, attach an attenuator (10-20 dB) and measure the output directly 4) Inspect the YIG board for broken connections (measure voltages at the YIG pins directly), damaged components (particularly the variable resistor if there is one), or other obvious problems. 5) Also, be sure your power measuring setup is working and properly connected :-) - Defects in measuring equipment can lead to some real trips "down the rabbit hole " Check the YIG output at several points in the basic frequency range - some YIG failures show up at either the Low or high end of the range. Cheers and hope it works out well. Cheers! Bruce Quoting RubenRubio <rubenrb2019@...>: I got it
I will measure again using the first harmonic band. Will post here the
exact results.
I am reluctant to think that the oscillator is dead, I hope that there
is more ways to check it. The service manual don¡¯t have any more. My
knowledge is limited, but I usually have intuition for these things.
Thanks Paul
Regards,
Ruben
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Rudolf BoscoLab
Paul Bicknell
RubenRubio
