¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
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Expanded Topics Messages
Date
HP 410B probe wire

 

I¡¯m picking up a HP 410B but the probe wires are dried up and cracking. What¡¯s the best type of wire to use?
High Voltage Silicone??
Re: HP 1727A CRO: Problem with the vertical output amplifier.

 

On Mon, Feb 28, 2022 at 02:26 PM, Alex_03 wrote:
Here are the same resistance measurements as before but taken with the IC completely removed. note that the IC only has 5 pins, not 7 as suggested by the manual, 1 and 4 are missing.

Values in ohms.
2&3=1020
2&7=390
2&6=376
2&5=393
3&7=898
3&6=766
3&5=670

To me these readings suggest that something has failed inside U2, given that none of the measurements are symmetrical across pins 2 and 3, let me know what you think.
---------
I would agree with your conclusion. It won't add any new information but the case seems to be the ground terminal, there is a ground connection inside the figure of the IC.

Ozan
Re: HP8640B RF Fails Several Seconds After Power Up

 

Have you checked for a cold-solder joint on the series-pass power transistor socket for the +44.6 V supply?

On 2022-02-28 3:24 p.m., Flannel Tuba wrote:

I have have had a very reliable?HP8640B that I bought as a parts unit years and rehabbed into a working state, including replacement of the tricky differential gears with brass ones. It has been a most faithful runner up until the other day when I was using it to align a receiver, when the RF output suddenly stopped, and the counter went to 00000. I powered it off and on, and the RF returned for 10-20 seconds and fell silent again. In further power cycles, the RF will occasionally come back on for a matter of a few seconds before failing again.

My first though was of course that one of the power supplies had finally lost a filter cap. So I checked them all for proper voltage and any ripple None of them had any sign of excessive ripple and all voltages were all spot on EXCEPT the +44.6. As long as the RF is being generated, it's happily at 44.6, but as soon as the RF quits, it rises to 47-49V and the voltage trim pot has no effect. I checked all the discrete components on the 44.6 board including swapping out the U2 723BE regulator. No luck.

I placed a scope directly on the output of the oscillator, both on the counter side and the main output, and it appears there is no RF oscillation happening at this point. In looking at the schematic, I was unable to see any use of the 44.6V supply in this area, so I'm baffled. It appears to use +/-20 and 5.2 but not 44.6. I've heard of heroic repairs of the RF cavity circuitry, but I am praying it's not failing there.

Any tips or thoughts of what to check next are most appreciated.

Scott

--
This email has been checked for viruses by AVG.
Re: How does R1 act as a fuse in the HP 3048A option K23 DC Blocking Filter?

 

Matt Huszagh <huszaghmatt@...> writes:

I'm looking at the schematic for the HP 3048A option K23 DC blocking
filter. I've attached a simplified version of this schematic for
convenience. Note that I've omitted the circuitry related to reverse
polarity (switch and diode protection). But, I don't need that to
address my question.

The manual states that the 51.1ohm R1 acts as a fuse protecting the DC
blocking filter (C3-16) from a large input DC voltage (K23 is rated for
+/- 30 V). C3-16 are rated for 50 VDC. How does this fuse action work
and how can we ensure it's reliable?

The description of R1 in the manual is:

RESISTOR 51.1 1% .05W TF TC=0+-100

I believe TF stands for thin film. So, the power rating of the resistor
is pretty low. Maybe that gives a hint. There's no DC current path
through R1. But, the startup ramp of a DC voltage is AC. Broadly, it
seems like we need to identify the scenario(s) in which there is a
voltage across R1 creating a short-duration power dissipation that
greatly exceeds R1's power rating. Because there's no DC current path,
we need to rely on a large, short-duration excess of power rather than a
steady excess of power to blow R1.

Current can either flow through C1 or L1 out of R1. C1 will present a
low impedance, but only at high frequencies (|Z_R1|=|Z_C1| at
663MHz). L1 will slow the voltage rise across C3-16. Presumably, the
goal is for R1 to blow open before the voltage across C3-16 exceeds the
voltage rating. If I make the initial ramp rate very fast I can greatly
exceed the 1.6V R1 rating, but only for a very short time. How can I be
sure to destroy the resistor? And, if I destroy it, how can I be sure it
will blow open? The NASA reliability design handbook (MIL-HDBK-338B)
gives the failure mode distribution for film resistors as (p. 7-198):

| failure mode | probability |
| <l> | <c> |
|------------------+-------------|
| open | 0.59 |
| parameter change | 0.36 |
| short | 0.05 |

Wouldn't it be easy to bypass the protection and exceed the capacitor's
voltage rating by supplying a ramp that's just slow enough that C1 looks
like a high-impedance?

There's a limiter across the output, but no proper fuse to blow if one
of these diodes starts to conduct. It seems like the 11848 or 3561 input
is pretty exposed in this case.

Thoughts? Maybe R1 isn't just a normal resistor?
I looked up the R1 part # in the Keysight part finder, which brings me
to . The description
there is: "Resistor-Fixed 51.1 Ohm +-1PCT 0.5W TC+-100 thin film
THT". So, it does look to be a normal resistor, not a fuse resistor, for
instance. Additionally, the part finder indicates that the 0.05 W power
rating in the manual may have been a typo, since this indicates 0.5
W. It seems a bit strange that this design would have relied on a
resistor for its fuse characteristics when there are other parts
designed specifically for this purpose.

Matt
Re: Newbie to KE5FX

 

¿ªÔÆÌåÓý

I wish I could help you more, Lou, but I work for a different department now and don't have access to my old files and notes.? ?Good luck.

Jim



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Lou Blasco <vk3alb@...>
Date: 2/28/22 12:14 PM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

Thanks Jim,

I've found a couple of NI posts talking about my issue and it seems I'm not alone. The advice from NI in the most recent post advises to roll back versions and to not accept any of the newer versions of drivers. Strange really, you would think accepting the defaults during installation would be the safest approach. More as I have it.
?
Regards

Lou
VK3ALB


On Tue, Mar 1, 2022 at 7:06 AM Jim Ford <james.ford@...> wrote:
I feel your pain, Lou.? A couple years ago I had to install an NI USB-GPIB interface at work to get a PC to talk to a Tek TDS3000 series scope.? Very painful!? It took weeks to get it to work properly.? All I can say is keep at it.


Jim Ford



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Lou Blasco <vk3alb@...>
Date: 2/28/22 11:51 AM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

Thanks to Rich & Nigel for your advice,

I think there may be a problem with my NI MAX installation. The device doesn't have a GPIB ID and the toolbar is empty. I think I need to get that sorted before I worry about anything else.?

image.png

Regards

Lou
VK3ALB


On Mon, Feb 28, 2022 at 11:27 PM nigel adams via <bristol.rell6l=[email protected]> wrote:

Could it be that you just need an alias for the USB-GPIB-HS to be identified as GPIB0?

?

This is usually achieved in the NI software driver? - you can download that from NI and install it ¨C then in NI-MAX utility you can see the device and clicking on it opens it¡¯s details window ¨C usually the ID is GPIB0.

?

What do you see if you look at the NI s/w?

It should look like the attached.

?

Device manager in windows just identifies the hardware by using an ID check.

?

Hope it helps.

Regards

Nigel

?

From: [email protected] <[email protected]> On Behalf Of Lou Blasco
Sent: 28 February 2022 10:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

?

Hi All,

?

Still lost but I found this when I tried to start the HP7470A plotter and got a pop-up. I'm sure this must be bleedingly obvious to many of you out there but could someone direct me on how to either change the GPIB adapter address to GPIB0 or how to configure connect.ini?

?

?

Regards

?

Lou

VK3ALB

?

?

On Mon, Feb 28, 2022 at 7:28 PM Lou Blasco via <vk3alb=[email protected]> wrote:

Hi,

?

I'm looking for help with the setup of the KE5FX software,?I'm not really sure what to expect.

?

I've installed a NI GPIB-USB-HS adapter and drivers on my PC. It shows up in the device manager as NI GPIB-USB-HS which I assume is correct. In the GPIB configurator I've edited the connect.ini file so is_prologix = 0 but what do I do about the NI interface? The notes in the ini file say "edit interface_settings accordingly" but what's the right setting?

?

Is there someone out there using the same HW & SW that could point me in the right direction?

?

Regards

?

Lou

VK3ALB
Re: HP 1727A CRO: Problem with the vertical output amplifier.

 

Here are the same resistance measurements as before but taken with the IC completely removed. note that the IC only has 5 pins, not 7 as suggested by the manual, 1 and 4 are missing.

Values in ohms.
2&3=1020
2&7=390
2&6=376
2&5=393
3&7=898
3&6=766
3&5=670

To me these readings suggest that something has failed inside U2, given that none of the measurements are symmetrical across pins 2 and 3, let me know what you think.
Re: Agilent ESA or ESA-L power supply.

Lothar baier
 

the problem is that with the newer agilent models they no longer designed and manufactured the PSU in house but rather procured them from a external vendor so there are no schematics available !? the service strategy also changed from component level repair to assembly exchange?
looking for 8753D/E/ES Parts

Lothar baier
 

i recently bought a 8702D on ebay , unfortunatly the seller did a shitty packing job and the unit got banged up so i am looking for a few things to fix the damage?

1.) back feet , i need at least 2 of them
2.) Button cover?
3.) testport coupler , the coupler still works but the connector is bent up in a angle so if anyone has a bad coupler where i can remove the connector i could use it?
HP8640B RF Fails Several Seconds After Power Up

 

I have have had a very reliable?HP8640B that I bought as a parts unit years and rehabbed into a working state, including replacement of the tricky differential gears with brass ones. It has been a most faithful runner up until the other day when I was using it to align a receiver, when the RF output suddenly stopped, and the counter went to 00000. I powered it off and on, and the RF returned for 10-20 seconds and fell silent again. In further power cycles, the RF will occasionally come back on for a matter of a few seconds before failing again.

My first though was of course that one of the power supplies had finally lost a filter cap. So I checked them all for proper voltage and any ripple. None of them had any sign of excessive ripple and all voltages were all spot on EXCEPT the +44.6. As long as the RF is being generated, it's happily at 44.6, but as soon as the RF quits, it rises to 47-49V and the voltage trim pot has no effect. I checked all the discrete components on the 44.6 board including swapping out the U2 723BE regulator. No luck.

I placed a scope directly on the output of the oscillator, both on the counter side and the main output, and it appears there is no RF oscillation happening at this point. In looking at the schematic, I was unable to see any use of the 44.6V supply in this area, so I'm baffled. It appears to use +/-20 and 5.2 but not 44.6. I've heard of heroic repairs of the RF cavity circuitry, but I am praying it's not failing there.?

Any tips or thoughts of what to check next are most appreciated.?

Scott
Re: Newbie to KE5FX

 

Thanks Jim,

I've found a couple of NI posts talking about my issue and it seems I'm not alone. The advice from NI in the most recent post advises to roll back versions and to not accept any of the newer versions of drivers. Strange really, you would think accepting the defaults during installation would be the safest approach. More as I have it.
?
Regards

Lou
VK3ALB


On Tue, Mar 1, 2022 at 7:06 AM Jim Ford <james.ford@...> wrote:
I feel your pain, Lou.? A couple years ago I had to install an NI USB-GPIB interface at work to get a PC to talk to a Tek TDS3000 series scope.? Very painful!? It took weeks to get it to work properly.? All I can say is keep at it.


Jim Ford



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Lou Blasco <vk3alb@...>
Date: 2/28/22 11:51 AM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

Thanks to Rich & Nigel for your advice,

I think there may be a problem with my NI MAX installation. The device doesn't have a GPIB ID and the toolbar is empty. I think I need to get that sorted before I worry about anything else.?

image.png

Regards

Lou
VK3ALB


On Mon, Feb 28, 2022 at 11:27 PM nigel adams via <bristol.rell6l=[email protected]> wrote:

Could it be that you just need an alias for the USB-GPIB-HS to be identified as GPIB0?

?

This is usually achieved in the NI software driver? - you can download that from NI and install it ¨C then in NI-MAX utility you can see the device and clicking on it opens it¡¯s details window ¨C usually the ID is GPIB0.

?

What do you see if you look at the NI s/w?

It should look like the attached.

?

Device manager in windows just identifies the hardware by using an ID check.

?

Hope it helps.

Regards

Nigel

?

From: [email protected] <[email protected]> On Behalf Of Lou Blasco
Sent: 28 February 2022 10:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

?

Hi All,

?

Still lost but I found this when I tried to start the HP7470A plotter and got a pop-up. I'm sure this must be bleedingly obvious to many of you out there but could someone direct me on how to either change the GPIB adapter address to GPIB0 or how to configure connect.ini?

?

?

Regards

?

Lou

VK3ALB

?

?

On Mon, Feb 28, 2022 at 7:28 PM Lou Blasco via <vk3alb=[email protected]> wrote:

Hi,

?

I'm looking for help with the setup of the KE5FX software,?I'm not really sure what to expect.

?

I've installed a NI GPIB-USB-HS adapter and drivers on my PC. It shows up in the device manager as NI GPIB-USB-HS which I assume is correct. In the GPIB configurator I've edited the connect.ini file so is_prologix = 0 but what do I do about the NI interface? The notes in the ini file say "edit interface_settings accordingly" but what's the right setting?

?

Is there someone out there using the same HW & SW that could point me in the right direction?

?

Regards

?

Lou

VK3ALB
Re: Newbie to KE5FX

 

¿ªÔÆÌåÓý

I feel your pain, Lou.? A couple years ago I had to install an NI USB-GPIB interface at work to get a PC to talk to a Tek TDS3000 series scope.? Very painful!? It took weeks to get it to work properly.? All I can say is keep at it.


Jim Ford



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Lou Blasco <vk3alb@...>
Date: 2/28/22 11:51 AM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

Thanks to Rich & Nigel for your advice,

I think there may be a problem with my NI MAX installation. The device doesn't have a GPIB ID and the toolbar is empty. I think I need to get that sorted before I worry about anything else.?



Regards

Lou
VK3ALB


On Mon, Feb 28, 2022 at 11:27 PM nigel adams via <bristol.rell6l=[email protected]> wrote:

Could it be that you just need an alias for the USB-GPIB-HS to be identified as GPIB0?

?

This is usually achieved in the NI software driver? - you can download that from NI and install it ¨C then in NI-MAX utility you can see the device and clicking on it opens it¡¯s details window ¨C usually the ID is GPIB0.

?

What do you see if you look at the NI s/w?

It should look like the attached.

?

Device manager in windows just identifies the hardware by using an ID check.

?

Hope it helps.

Regards

Nigel

?

From: [email protected] <[email protected]> On Behalf Of Lou Blasco
Sent: 28 February 2022 10:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

?

Hi All,

?

Still lost but I found this when I tried to start the HP7470A plotter and got a pop-up. I'm sure this must be bleedingly obvious to many of you out there but could someone direct me on how to either change the GPIB adapter address to GPIB0 or how to configure connect.ini?

?

?

Regards

?

Lou

VK3ALB

?

?

On Mon, Feb 28, 2022 at 7:28 PM Lou Blasco via <vk3alb=[email protected]> wrote:

Hi,

?

I'm looking for help with the setup of the KE5FX software,?I'm not really sure what to expect.

?

I've installed a NI GPIB-USB-HS adapter and drivers on my PC. It shows up in the device manager as NI GPIB-USB-HS which I assume is correct. In the GPIB configurator I've edited the connect.ini file so is_prologix = 0 but what do I do about the NI interface? The notes in the ini file say "edit interface_settings accordingly" but what's the right setting?

?

Is there someone out there using the same HW & SW that could point me in the right direction?

?

Regards

?

Lou

VK3ALB
Re: Newbie to KE5FX

 

Thanks to Rich & Nigel for your advice,

I think there may be a problem with my NI MAX installation. The device doesn't have a GPIB ID and the toolbar is empty. I think I need to get that sorted before I worry about anything else.?

image.png

Regards

Lou
VK3ALB


On Mon, Feb 28, 2022 at 11:27 PM nigel adams via <bristol.rell6l=[email protected]> wrote:

Could it be that you just need an alias for the USB-GPIB-HS to be identified as GPIB0?

?

This is usually achieved in the NI software driver? - you can download that from NI and install it ¨C then in NI-MAX utility you can see the device and clicking on it opens it¡¯s details window ¨C usually the ID is GPIB0.

?

What do you see if you look at the NI s/w?

It should look like the attached.

?

Device manager in windows just identifies the hardware by using an ID check.

?

Hope it helps.

Regards

Nigel

?

From: [email protected] <[email protected]> On Behalf Of Lou Blasco
Sent: 28 February 2022 10:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX

?

Hi All,

?

Still lost but I found this when I tried to start the HP7470A plotter and got a pop-up. I'm sure this must be bleedingly obvious to many of you out there but could someone direct me on how to either change the GPIB adapter address to GPIB0 or how to configure connect.ini?

?

?

Regards

?

Lou

VK3ALB

?

?

On Mon, Feb 28, 2022 at 7:28 PM Lou Blasco via <vk3alb=[email protected]> wrote:

Hi,

?

I'm looking for help with the setup of the KE5FX software,?I'm not really sure what to expect.

?

I've installed a NI GPIB-USB-HS adapter and drivers on my PC. It shows up in the device manager as NI GPIB-USB-HS which I assume is correct. In the GPIB configurator I've edited the connect.ini file so is_prologix = 0 but what do I do about the NI interface? The notes in the ini file say "edit interface_settings accordingly" but what's the right setting?

?

Is there someone out there using the same HW & SW that could point me in the right direction?

?

Regards

?

Lou

VK3ALB
Re: Agilent ESA or ESA-L power supply.

 

¿ªÔÆÌåÓý

Hi Lothar.

I receive the package from artekmedia on 25/2 but no references to the power supply.
Thanks anyway.

Rui Martins?

Get

From: [email protected] <[email protected]> on behalf of Lothar baier <Lothar@...>
Sent: Monday, February 28, 2022 4:52:27 PM
To: [email protected] <[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] Agilent ESA or ESA-L power supply.
?

E4401-90310? , you can order it from ARTEK MEDIA .

Having said this however I am not sure if the PSU is documented

?

Sent from for Windows

?

From: Rui Oliveira Martins via groups.io
Sent: Monday, February 28, 2022 10:44 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Agilent ESA or ESA-L power supply.

?

Hi to all.

?

I need the supply schematics for E 4401 analyzer.

I think is the same for all the ESA or ESA-L spectrum Analyzers.

?

Tanks in advance.

CT1EBH

Rui Martins.

?

Get

?
Re: Readout from HP54602A U75 Needed (CORRECTION)

 

The part for U75 on the HP54602A PCB is a DS1220 and should be read as a DS1220. The B model uses the DS1225. The DS1220 may be replaced by a M48Z12 available from Mouser.
Sorry for the confusion.
Re: 8350B *restoration adventure?*

Lothar baier
 

¿ªÔÆÌåÓý

Let me give you one piece of advice as far as ebay goes ,? don¡¯t take the prices at face value , ALWAYS look for listings that have best offer enabled and throw a lowball offer on it , I had good success with this approach ,? I got a 8341B? that was listed at $1999 for $499 and a 8702D VNA listed at $899 for $300

A lot of sellers look at what other listings are asking and just put it out there at a similar price but are negotiable

?

Sent from for Windows

?

From: [email protected] <[email protected]> on behalf of Yves Tardif via groups.io <yves_tardif@...>
Sent: Monday, February 28, 2022 11:22:36 AM
To: [email protected] <[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] 8350B *restoration adventure?*
?

Hi Ruben,

?

On my side, I have just finished the restoration of my 8350B and did a complete alignment. It meets all specifications.

I also finished with the 83595A plugin, changed some parts and realigned it...it wasn't as easy as I would have liked, but everything works fine now.

?

So, maybe I can help you, I'm going to measure the currents of the different power supplies, as well as the associated voltages and ripple, it will give you an idea for the next steps.

I have 3 different plugins; I will look at the different loads.

?

I hope you find the plugin you want at a reasonable price.

?

Regards

Yves

?

De?: [email protected] <[email protected]> De la part de RubenRubio
·¡²Ô±¹´Ç²â¨¦?: 28 f¨¦vrier 2022 07:24
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] 8350B *restoration adventure?*

?

Thank you for your words Yves, for now I have put the 8350B project on hold. I am looking for a plugin at a good price to continue checking current consumption. Again, best price tags are on the States, but high freight costs and customs to Spain makes the deals more difficult. So I must be patient and still searching every day.

Regards,
Ruben

Re: 8350B *restoration adventure?*

 

¿ªÔÆÌåÓý

Hi Ruben,

?

On my side, I have just finished the restoration of my 8350B and did a complete alignment. It meets all specifications.

I also finished with the 83595A plugin, changed some parts and realigned it...it wasn't as easy as I would have liked, but everything works fine now.

?

So, maybe I can help you, I'm going to measure the currents of the different power supplies, as well as the associated voltages and ripple, it will give you an idea for the next steps.

I have 3 different plugins; I will look at the different loads.

?

I hope you find the plugin you want at a reasonable price.

?

Regards

Yves

?

De?: [email protected] <[email protected]> De la part de RubenRubio
·¡²Ô±¹´Ç²â¨¦?: 28 f¨¦vrier 2022 07:24
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] 8350B *restoration adventure?*

?

Thank you for your words Yves, for now I have put the 8350B project on hold. I am looking for a plugin at a good price to continue checking current consumption. Again, best price tags are on the States, but high freight costs and customs to Spain makes the deals more difficult. So I must be patient and still searching every day.

Regards,
Ruben

Re: Agilent ESA or ESA-L power supply.

Lothar baier
 

¿ªÔÆÌåÓý

E4401-90310? , you can order it from ARTEK MEDIA .

Having said this however I am not sure if the PSU is documented

?

Sent from for Windows

?

From: Rui Oliveira Martins via groups.io
Sent: Monday, February 28, 2022 10:44 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Agilent ESA or ESA-L power supply.

?

Hi to all.

?

I need the supply schematics for E 4401 analyzer.

I think is the same for all the ESA or ESA-L spectrum Analyzers.

?

Tanks in advance.

CT1EBH

Rui Martins.

?

Get

?

06BCC4803BD540C58A9126268E1BD8AB.png

Agilent ESA or ESA-L power supply.

 

¿ªÔÆÌåÓý

Hi to all.

I need the supply schematics for E 4401 analyzer.
I think is the same for all the ESA or ESA-L spectrum Analyzers.

Tanks in advance.
CT1EBH
Rui Martins.

Get

Readout from HP54602A U75 Needed

 

Hello,

I have a HP54602A (not B) DSO that I need a binary or hex readout of the contents of U75 the evil DS1220 or M48Z18 battery backed lithium SRAM. Mine has gone flat.
Anyone who has a 54600 series scope should read these out and store the contents for safekeeping. I know that you can self calibrate this scope but without the base information in the SRAM calibration is of no use,.

Thank you for taking the time to read my message.

Sam
W3OHM
Re: HP Masked Microcontroller Question

 


There use to be a normalizer/offset Option 6 that could be purchased (see Ebay pic below)? Per the photo, this option was available with the HP5316A which included HPIB functionality.? The Option 6 was discontinued somewhere between the 5316A and 5316B, I believe.? My guess due to poor sales.? Studying the schematics between the 5316A and B showed that the only difference was that the interface socket used to bridge a ribbon cable between the Option 6 to 5316B was removed.? Also, the CE2 and CE3 (chip enable) signals are shared between the Option 6 and the Option 3.? These two signals were originally designated for reading the Option 6 switches per the HP5316A manual.

So... what this is really about is whether I can come up with a way to reimpliment the Option 6 capability in a more modern fashion.? So, if the main counter microprocessor hasn't changed it appears to me that the Option 6 still is available and some clever hardware mod would allow its use.? The Option 6 had it's own service manual but I have not been able to find it.? I think I will grab the Logic analyzer and reverse engineer the signals related to the Option 6 to get a better idea of what is going on.


If anyone has any comments/advise, it would be appreciated.
Thanks
Jim
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