Re: Question on using Prologix GPIB adapter
I believe a big clue here is that I get hard failures if I use a CR as a terminator but a LF works at least partially.? According to the Prologix documentation, either should work properly.? Something is very odd with VBA is handling stream writes in this respect.
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On 3/25/2022 10:03 PM, si_emi_01 wrote: Hi,
I have seen this be a problem when you end a Called program loop with a Reset Command - which can generate and End or Identify (EOI), and then return from the Call with either a Reset (2nd time) or End or Identify Command, which can kill the current transaction in progress including Data Transfers.
Just saying...
Ross
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Abdul Nizar
Sent: Friday, March 25, 2022 7:56 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
So the same command sequence works with the Configurator app but not with your VBA program?
Seems like VBA may be mangling the termination character(s). Try a serial port monitoring program to observe exactly what is being sent to the controller.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Peter Gottlieb
Sent: Friday, March 25, 2022 4:03 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
So here's something I tried.
Instead of initially sending ["++addr 12" + chr(10)] I sent [chr(10) +"++addr 12" + chr(10)] and the adapter changed address. But if I try to do this a second time with another address it still goes to the instrument instead of changing the adapter address.
I should note this is a Windows 10 Pro system with Excel 365.
On 3/25/2022 6:38 PM, Abdul Nizar wrote:
Hi Peter,
But if I send a "++addr 10" command, according to the manual, the
Prologix
should interpret that as a command to change >> primary address to 10,
but instead it seems to just send that through to the instrument at
address 12, which promptly reports >> an error.
Is the input (command or data) prior to ¡°++addr 10¡± properly
terminated with a LF character? Else, the adapter will assume that
¡°++addr 10¡± is a continuation of the previous input and send it verbatim to the currently addressed instrument.
Regards,
Abdul
*From:*[email protected]
[mailto:[email protected]] *On Behalf Of *Peter
Gottlieb
*Sent:* Friday, March 25, 2022 3:20 PM
*To:* [email protected]
*Subject:* [HP-Agilent-Keysight-equipment] Question on using Prologix
GPIB adapter
Hello HP GPIB experts:
I have an experimental setup with a couple of 34401A meters, a power
supply and a load which I wish to control by the use of a Prologix GPIB-USB adapter.
It was controlled with a NI device but the drivers are giving me some
instability so I thought I would get a new machine and use the
Prologix and eliminate all the drivers.
I have it hooked up and can use the John Miles configurator program to
set the primary address and issue GPIB commands such as *IDN? and get
proper responses from all the connected equipment.
But when I try to communicate from inside an Excel VBA program, I
can't get the Prologix to change address or otherwise react to any command.
For example: having set the Prologix (using the configurator) to
address 12, I can issue a "*IDN?" command and get a response from that
particular instrument. But if I send a "++addr 10" command, according
to the manual, the Prologix should interpret that as a command to
change primary address to 10, but instead it seems to just send that
through to the instrument at address 12, which promptly reports an error.
It seems there is something dead simple I am not doing right but I
have no idea what.
Does anyone have any idea what I need to do differently?
Peter
|
Re: HP 8657B attenuator(s) issues?...
Don: unfortunately - more research underway - even in the Artek-sourced, long form SMs, it's still unclear what part numbers are A9-AT1, A9-AT2, etc. Mostly a great, HP-level SM, but not on this particular topic. I've been figuring out the machine mostly by piecing?together the SM and the actual thing in my custody, and cross referencing.?
Lothar: from my limited research, it may be that the 8657B (only, from the entire series), being distinctly?superior to the prior 8656-8657(A)s, got the better attenuators (and, again, distinctly better specs than the others). I think this particular?model crossed a threshold?between the two worlds, so it may be a pretty good instrument?to have.?
Radu.?
On Fri, Mar 25, 2022 at 8:49 PM Lothar baier < Lothar@...> wrote: Interesting, i fixed 8656A at tucker but only a few 8657A units and they both had the same attenuator design and not the inline design used on the other generators, i attributed this to the fact that the 56/57 were low cost generators and therefore using the more expensive 3332x models was not a option, looks at some point they switched
> On Mar 25, 2022, at 22:36, Don Bitters via <donbitters=[email protected]> wrote:
>
> ?The 8656A and possibly early versions of the 8657A used the long, skinny attenuators. After that they used the 3332x format attenuators. One of these is a 75dB step attenuator, the other is a 70dB step attenuator, so there could be a fault with the 5dB section of the 75dB attenuator. I cannot remember which attenuator is which. The part no¡¯s. and descriptions should be in the manual part list. The manuals for the 8656/57A/B still had the parts lists and schematics, if I recall correctly.
> Don Bitters
>
>
>
>
>
|
Re: Question on using Prologix GPIB adapter
My simple test program to get the adapter under control does not send a reset command, but since I have only gotten it to reliably send one command, I am not sure what is going on with EOI settings and interactions.
Peter
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On 3/25/2022 10:03 PM, si_emi_01 wrote: Hi,
I have seen this be a problem when you end a Called program loop with a Reset Command - which can generate and End or Identify (EOI), and then return from the Call with either a Reset (2nd time) or End or Identify Command, which can kill the current transaction in progress including Data Transfers.
Just saying...
Ross
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Abdul Nizar
Sent: Friday, March 25, 2022 7:56 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
So the same command sequence works with the Configurator app but not with your VBA program?
Seems like VBA may be mangling the termination character(s). Try a serial port monitoring program to observe exactly what is being sent to the controller.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Peter Gottlieb
Sent: Friday, March 25, 2022 4:03 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
So here's something I tried.
Instead of initially sending ["++addr 12" + chr(10)] I sent [chr(10) +"++addr 12" + chr(10)] and the adapter changed address. But if I try to do this a second time with another address it still goes to the instrument instead of changing the adapter address.
I should note this is a Windows 10 Pro system with Excel 365.
On 3/25/2022 6:38 PM, Abdul Nizar wrote:
Hi Peter,
But if I send a "++addr 10" command, according to the manual, the
Prologix
should interpret that as a command to change >> primary address to 10,
but instead it seems to just send that through to the instrument at
address 12, which promptly reports >> an error.
Is the input (command or data) prior to ¡°++addr 10¡± properly
terminated with a LF character? Else, the adapter will assume that
¡°++addr 10¡± is a continuation of the previous input and send it verbatim to the currently addressed instrument.
Regards,
Abdul
*From:*[email protected]
[mailto:[email protected]] *On Behalf Of *Peter
Gottlieb
*Sent:* Friday, March 25, 2022 3:20 PM
*To:* [email protected]
*Subject:* [HP-Agilent-Keysight-equipment] Question on using Prologix
GPIB adapter
Hello HP GPIB experts:
I have an experimental setup with a couple of 34401A meters, a power
supply and a load which I wish to control by the use of a Prologix GPIB-USB adapter.
It was controlled with a NI device but the drivers are giving me some
instability so I thought I would get a new machine and use the
Prologix and eliminate all the drivers.
I have it hooked up and can use the John Miles configurator program to
set the primary address and issue GPIB commands such as *IDN? and get
proper responses from all the connected equipment.
But when I try to communicate from inside an Excel VBA program, I
can't get the Prologix to change address or otherwise react to any command.
For example: having set the Prologix (using the configurator) to
address 12, I can issue a "*IDN?" command and get a response from that
particular instrument. But if I send a "++addr 10" command, according
to the manual, the Prologix should interpret that as a command to
change primary address to 10, but instead it seems to just send that
through to the instrument at address 12, which promptly reports an error.
It seems there is something dead simple I am not doing right but I
have no idea what.
Does anyone have any idea what I need to do differently?
Peter
|
Re: Question on using Prologix GPIB adapter
I would say there is a good chance you are correct.? Or VBA is doing something else strange.
I have found that if I send the sequence below which starts with the termination character it works for the first command sent.? So far I haven't figured out a reliable sequence for commands after that. Sometimes they work, sometimes not.
I would like to send a complete configuration to the adapter.? Yes, it remembers, but I really hate not properly initializing hardware. Such a program will work now, but one day if another program changes the adapter settings my program won't work and I'll have to pull my hair out trying to get it to run.
Definitely something with VBA.? Maybe only with the serial part. Perhaps my solution is to get the Ethernet version of this adapter and then opening a telnet session to it, as was suggested.
Peter
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On 3/25/2022 9:55 PM, Abdul Nizar wrote: So the same command sequence works with the Configurator app but not with your VBA program?
Seems like VBA may be mangling the termination character(s). Try a serial port monitoring program to observe exactly what is being sent to the controller.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Peter Gottlieb
Sent: Friday, March 25, 2022 4:03 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
So here's something I tried.
Instead of initially sending ["++addr 12" + chr(10)] I sent [chr(10) +"++addr
12" + chr(10)] and the adapter changed address. But if I try to do this a second
time with another address it still goes to the instrument instead of changing
the adapter address.
I should note this is a Windows 10 Pro system with Excel 365.
On 3/25/2022 6:38 PM, Abdul Nizar wrote:
Hi Peter,
But if I send a "++addr 10" command, according to the manual, the Prologix
should interpret that as a command to change >> primary address to 10, but
instead it seems to just send that through to the instrument at address 12,
which promptly reports >> an error.
Is the input (command or data) prior to ¡°++addr 10¡± properly terminated with a
LF character? Else, the adapter will assume that ¡°++addr 10¡± is a continuation
of the previous input and send it verbatim to the currently addressed instrument.
Regards,
Abdul
*From:*[email protected]
[mailto:[email protected]] *On Behalf Of *Peter Gottlieb
*Sent:* Friday, March 25, 2022 3:20 PM
*To:* [email protected]
*Subject:* [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
Hello HP GPIB experts:
I have an experimental setup with a couple of 34401A meters, a power supply
and a load which I wish to control by the use of a Prologix GPIB-USB adapter.
It was controlled with a NI device but the drivers are giving me some
instability so I thought I would get a new machine and use the Prologix and
eliminate all the drivers.
I have it hooked up and can use the John Miles configurator program to set the
primary address and issue GPIB commands such as *IDN? and get proper responses
from all the connected equipment.
But when I try to communicate from inside an Excel VBA program, I can't get
the Prologix to change address or otherwise react to any command.
For example: having set the Prologix (using the configurator) to address 12,
I can issue a "*IDN?" command and get a response from that particular
instrument. But if I send a "++addr 10" command, according to the manual, the
Prologix should interpret that as a command to change primary address to 10,
but instead it seems to just send that through to the instrument at address
12, which promptly reports an error.
It seems there is something dead simple I am not doing right but I have no
idea what.
Does anyone have any idea what I need to do differently?
Peter
|
Re: HP 8657B attenuator(s) issues?...
Interesting, i fixed 8656A at tucker but only a few 8657A units and they both had the same attenuator design and not the inline design used on the other generators, i attributed this to the fact that the 56/57 were low cost generators and therefore using the more expensive 3332x models was not a option, looks at some point they switched
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Show quoted text
On Mar 25, 2022, at 22:36, Don Bitters via groups.io <donbitters@...> wrote:
?The 8656A and possibly early versions of the 8657A used the long, skinny attenuators. After that they used the 3332x format attenuators. One of these is a 75dB step attenuator, the other is a 70dB step attenuator, so there could be a fault with the 5dB section of the 75dB attenuator. I cannot remember which attenuator is which. The part no¡¯s. and descriptions should be in the manual part list. The manuals for the 8656/57A/B still had the parts lists and schematics, if I recall correctly.
Don Bitters
|
Re: HP 8657B attenuator(s) issues?...
The 8656A and possibly early versions of the 8657A used the long, skinny attenuators. After that they used the 3332x format attenuators. One of these is a 75dB step attenuator, the other is a 70dB step attenuator, so there could be a fault with the 5dB section of the 75dB attenuator. I cannot remember which attenuator is which. The part no¡¯s. and descriptions should be in the manual part list. The manuals for the 8656/57A/B still had the parts lists and schematics, if I recall correctly.
Don Bitters
|
Re: HP83595A/B (HP 8350) ROM firmware required
" I checked everything again, and found that one of the EPROMs was an Intel 2732A-4 instead of 2732A-3.
I had put a label that hid this information, so I didn't realize it immediately and it was when I started the process again that I saw the error.
Now version 9 of the firmware works correctly. "
?
That's good news! In fact I'm not sure the speed would be the problem - the CPU in the plugin clocked at several hundred KHz. I use the antique TMS2732AJL-45 EPROM (with an interesting pop up window) and got no problem at all! Your problem was more likely came from the connector on the back of the plugin or (less possible) a bad bit in the EPROM. Also, be sure remove the battery inside the 8350 it can make nasty problem when leak.
?
*** Correct the typo: EPROM not EEPROM. Sorry to spam you again.
?
|
Re: 8596E adjustment SAMPLING MATHC
Well, on the manual, it says 1.5 +- 1V on TP1/2. So, it canbe as low as 0.5V and these TP have internal resistance of 100K. make sure you use a high impedance DMM to measure them. Also, the C107 should be the air type, you can see it through the hole. Be sure to check the sampler driver signal and LO signal on J1, they should on the right level. What kind problem your 8596E has ? any error shows on screen ? phase lock off? 
|
Re: Question on using Prologix GPIB adapter
Yup...
Harvey is correct! It is an Octal box.
I used one extensively in 1985, so I weas fully used to running in Octal and Hex mode of thinking.
I should update both of my HP59401A to Hex as well. Probably easiest to use a couple of TIL311s.
Ross
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Harvey White Sent: Friday, March 25, 2022 7:35 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter One little gotcha with this equipment is that it comes from the era when octal decoders were common, and hex decoders were not. The readout is in octal (0-255 -> 0-377) rather than hex (0-0xFF). You may need a translation table. I haven't "fixed" mine yet. Harvey On 3/25/2022 9:21 PM, si_emi_01 wrote: Hi,
You could probably benefit from having an HP59401A GPIB Bus Analyzer. I have used it for the following functions:
1. It shows all of the transactions and Status Lines real-time or stored with a memory depth of 32 Characters (Command/Data/etc.).
2. It can Monitor the Bus as a Listener. It indicates all of the Bus Control Signals with each fetch or execute.
3. It can Command the Bus (or specific device) as a Talker. It uses the Service Request (SRQ), Remote Enable (REN), Attention (ATN) and End or Identify (EOI) or combination of them with a Trigger Word for that.
4. It can also Generate a Character/Command External Trigger (like for an Oscilloscope), based on a Trigger Word.
5. It can Stop all Bus Transactions when a Trigger Word is met.
6. It allows you to control the Bus Execution Speed or Halt the Bus too.
Simple, accurate and very handy for this type of problem because you see exactly what is going on or control the bus from an actual bus hardware connection.
They are around $100 to $150 US on FleeBay.
Ross
-----Original Message-----
From: [email protected]
<[email protected]> On Behalf Of Peter Gottlieb
Sent: Friday, March 25, 2022 4:51 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using
Prologix GPIB adapter
To be honest I am not sure exactly what is being sent out on the GPIB. I do see the "Talk" LED on the Prologix flash and the instrument complain but don't have any capability to observe what happens on the GPIB.
It does appear to be something to do with communicating with the Prologix, but what could it be?
On 3/25/2022 6:47 PM, W2HX wrote:
Peter, can you confirm that "++ver" is sending "++ver" to the
instrument? It shouldn't. Meaning this may not be an issue with
changing the address of the target device, but it may be an issue communicating with the prologix itself?
|
Re: Question on using Prologix GPIB adapter
Hi,
I have seen this be a problem when you end a Called program loop with a Reset Command - which can generate and End or Identify (EOI), and then return from the Call with either a Reset (2nd time) or End or Identify Command, which can kill the current transaction in progress including Data Transfers.
Just saying...
Ross
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Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Abdul Nizar Sent: Friday, March 25, 2022 7:56 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter So the same command sequence works with the Configurator app but not with your VBA program? Seems like VBA may be mangling the termination character(s). Try a serial port monitoring program to observe exactly what is being sent to the controller. -----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Peter Gottlieb Sent: Friday, March 25, 2022 4:03 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter So here's something I tried. Instead of initially sending ["++addr 12" + chr(10)] I sent [chr(10) +"++addr 12" + chr(10)] and the adapter changed address. But if I try to do this a second time with another address it still goes to the instrument instead of changing the adapter address. I should note this is a Windows 10 Pro system with Excel 365. On 3/25/2022 6:38 PM, Abdul Nizar wrote:
Hi Peter,
But if I send a "++addr 10" command, according to the manual, the
Prologix
should interpret that as a command to change >> primary address to 10,
but instead it seems to just send that through to the instrument at
address 12, which promptly reports >> an error.
Is the input (command or data) prior to ¡°++addr 10¡± properly
terminated with a LF character? Else, the adapter will assume that
¡°++addr 10¡± is a continuation of the previous input and send it verbatim to the currently addressed instrument.
Regards,
Abdul
*From:*[email protected]
[mailto:[email protected]] *On Behalf Of *Peter
Gottlieb
*Sent:* Friday, March 25, 2022 3:20 PM
*To:* [email protected]
*Subject:* [HP-Agilent-Keysight-equipment] Question on using Prologix
GPIB adapter
Hello HP GPIB experts:
I have an experimental setup with a couple of 34401A meters, a power
supply and a load which I wish to control by the use of a Prologix GPIB-USB adapter.
It was controlled with a NI device but the drivers are giving me some
instability so I thought I would get a new machine and use the
Prologix and eliminate all the drivers.
I have it hooked up and can use the John Miles configurator program to
set the primary address and issue GPIB commands such as *IDN? and get
proper responses from all the connected equipment.
But when I try to communicate from inside an Excel VBA program, I
can't get the Prologix to change address or otherwise react to any command.
For example: having set the Prologix (using the configurator) to
address 12, I can issue a "*IDN?" command and get a response from that
particular instrument. But if I send a "++addr 10" command, according
to the manual, the Prologix should interpret that as a command to
change primary address to 10, but instead it seems to just send that
through to the instrument at address 12, which promptly reports an error.
It seems there is something dead simple I am not doing right but I
have no idea what.
Does anyone have any idea what I need to do differently?
Peter
|
Re: Question on using Prologix GPIB adapter
So the same command sequence works with the Configurator app but not with your VBA program?
Seems like VBA may be mangling the termination character(s). Try a serial port monitoring program to observe exactly what is being sent to the controller.
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Peter Gottlieb Sent: Friday, March 25, 2022 4:03 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter So here's something I tried. Instead of initially sending ["++addr 12" + chr(10)] I sent [chr(10) +"++addr 12" + chr(10)] and the adapter changed address. But if I try to do this a second time with another address it still goes to the instrument instead of changing the adapter address. I should note this is a Windows 10 Pro system with Excel 365. On 3/25/2022 6:38 PM, Abdul Nizar wrote:
Hi Peter,
But if I send a "++addr 10" command, according to the manual, the Prologix
should interpret that as a command to change >> primary address to 10, but
instead it seems to just send that through to the instrument at address 12,
which promptly reports >> an error.
Is the input (command or data) prior to ¡°++addr 10¡± properly terminated with a
LF character? Else, the adapter will assume that ¡°++addr 10¡± is a continuation
of the previous input and send it verbatim to the currently addressed instrument.
Regards,
Abdul
*From:*[email protected]
[mailto:[email protected]] *On Behalf Of *Peter Gottlieb
*Sent:* Friday, March 25, 2022 3:20 PM
*To:* [email protected]
*Subject:* [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
Hello HP GPIB experts:
I have an experimental setup with a couple of 34401A meters, a power supply
and a load which I wish to control by the use of a Prologix GPIB-USB adapter.
It was controlled with a NI device but the drivers are giving me some
instability so I thought I would get a new machine and use the Prologix and
eliminate all the drivers.
I have it hooked up and can use the John Miles configurator program to set the
primary address and issue GPIB commands such as *IDN? and get proper responses
from all the connected equipment.
But when I try to communicate from inside an Excel VBA program, I can't get
the Prologix to change address or otherwise react to any command.
For example: having set the Prologix (using the configurator) to address 12,
I can issue a "*IDN?" command and get a response from that particular
instrument. But if I send a "++addr 10" command, according to the manual, the
Prologix should interpret that as a command to change primary address to 10,
but instead it seems to just send that through to the instrument at address
12, which promptly reports an error.
It seems there is something dead simple I am not doing right but I have no
idea what.
Does anyone have any idea what I need to do differently?
Peter
|
Re: Question on using Prologix GPIB adapter
One little gotcha with this equipment is that it comes from the era when octal decoders were common, and hex decoders were not.
The readout is in octal (0-255 -> 0-377) rather than hex (0-0xFF).? You may need a translation table.? I haven't "fixed" mine yet.
Harvey
toggle quoted message
Show quoted text
On 3/25/2022 9:21 PM, si_emi_01 wrote: Hi,
You could probably benefit from having an HP59401A GPIB Bus Analyzer. I have used it for the following functions:
1. It shows all of the transactions and Status Lines real-time or stored with a memory depth of 32 Characters (Command/Data/etc.).
2. It can Monitor the Bus as a Listener. It indicates all of the Bus Control Signals with each fetch or execute.
3. It can Command the Bus (or specific device) as a Talker. It uses the Service Request (SRQ), Remote Enable (REN), Attention (ATN) and End or Identify (EOI) or combination of them with a Trigger Word for that.
4. It can also Generate a Character/Command External Trigger (like for an Oscilloscope), based on a Trigger Word.
5. It can Stop all Bus Transactions when a Trigger Word is met.
6. It allows you to control the Bus Execution Speed or Halt the Bus too.
Simple, accurate and very handy for this type of problem because you see exactly what is going on or control the bus from an actual bus hardware connection.
They are around $100 to $150 US on FleeBay.
Ross
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Peter Gottlieb
Sent: Friday, March 25, 2022 4:51 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
To be honest I am not sure exactly what is being sent out on the GPIB. I do see the "Talk" LED on the Prologix flash and the instrument complain but don't have any capability to observe what happens on the GPIB.
It does appear to be something to do with communicating with the Prologix, but what could it be?
On 3/25/2022 6:47 PM, W2HX wrote:
Peter, can you confirm that "++ver" is sending "++ver" to the instrument? It
shouldn't. Meaning this may not be an issue with changing the address of the
target device, but it may be an issue communicating with the prologix itself?
|
Re: 8596E adjustment SAMPLING MATHC
On Fri, Mar 25, 2022 at 06:51 AM, Franco Macci¨° wrote:
YTO is working, the suspicion on the IF1 sampler is that on TP1-TP2, close to the expensive U100, they have + 0.36V-0.35V instead of +1.5, -1.5V approximately, which can be balanced via C107, which does not act at all. I am not clear about the solder joint point on the sampler pin.
------- Are you using 10MHz span during this test? It is needed to keep counterlock running.? From your question of?SO_RELOCK/SAMPSW/SAMPDRV, is it correct to assume you already identified sampling oscillator as the problem by looking at the sampling oscillator input to the sampler? Does the YTO input path has -10dB YTO signal? Ozan
|
Re: Question on using Prologix GPIB adapter
Hi,
You could probably benefit from having an HP59401A GPIB Bus Analyzer. I have used it for the following functions:
1. It shows all of the transactions and Status Lines real-time or stored with a memory depth of 32 Characters (Command/Data/etc.).
2. It can Monitor the Bus as a Listener. It indicates all of the Bus Control Signals with each fetch or execute.
3. It can Command the Bus (or specific device) as a Talker. It uses the Service Request (SRQ), Remote Enable (REN), Attention (ATN) and End or Identify (EOI) or combination of them with a Trigger Word for that.
4. It can also Generate a Character/Command External Trigger (like for an Oscilloscope), based on a Trigger Word.
5. It can Stop all Bus Transactions when a Trigger Word is met.
6. It allows you to control the Bus Execution Speed or Halt the Bus too.
Simple, accurate and very handy for this type of problem because you see exactly what is going on or control the bus from an actual bus hardware connection.
They are around $100 to $150 US on FleeBay.
Ross
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Peter Gottlieb Sent: Friday, March 25, 2022 4:51 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter To be honest I am not sure exactly what is being sent out on the GPIB. I do see the "Talk" LED on the Prologix flash and the instrument complain but don't have any capability to observe what happens on the GPIB. It does appear to be something to do with communicating with the Prologix, but what could it be? On 3/25/2022 6:47 PM, W2HX wrote: Peter, can you confirm that "++ver" is sending "++ver" to the instrument? It
shouldn't. Meaning this may not be an issue with changing the address of the
target device, but it may be an issue communicating with the prologix itself?
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Re: HP83595A/B (HP 8350) ROM firmware required
Check the access times, very possible that the -4 was too slow,
-3 would be fine, and in theory -2 or whatever would be fine as
well.? However, giving data too fast may sometimes result in
improper operation, so I'm told.? How the circuit was designed
makes some difference.
Many of the early circuits were designed with "it works, don't
touch it" philosophy.
Harvey
On 3/25/2022 6:58 PM, Yves Tardif
wrote:
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Hi,
?
I checked everything again, and found that one
of the EPROMs was an Intel 2732A-4 instead of 2732A-3.
I had put a label that hid this information, so
I didn't realize it immediately and it was when I started
the process again that I saw the error.
Now version 9 of the firmware works correctly.
?
Another point, the A3 digital PCB of the 83595A
plugin is an old version 83525-60007, my 2 other plugins
(83522A and 83540A) had the version 83525-60080. I still
tested these 2 versions of PCB A3, and it works well in both
cases.
?
?
Thanks to Lothar and Yue for their comments.
?
?
Why don¡¯t you guys
compare the part# of the processor board ????
?
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Re: Question on using Prologix GPIB adapter
So here's something I tried.
Instead of initially sending ["++addr 12" + chr(10)]? I sent [chr(10) +"++addr 12" + chr(10)] and the adapter changed address. But if I try to do this a second time with another address it still goes to the instrument instead of changing the adapter address.
I should note this is a Windows 10 Pro system with Excel 365.
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On 3/25/2022 6:38 PM, Abdul Nizar wrote:
Hi Peter,
But if I send a "++addr 10" command, according to the manual, the Prologix
should interpret that as a command to change >> primary address to 10, but instead it seems to just send that through to the instrument at address 12, which promptly reports >> an error.
Is the input (command or data) prior to ¡°++addr 10¡± properly terminated with a LF character? Else, the adapter will assume that ¡°++addr 10¡± is a continuation of the previous input and send it verbatim to the currently addressed instrument.
Regards,
Abdul
*From:*[email protected] [mailto:[email protected]] *On Behalf Of *Peter Gottlieb
*Sent:* Friday, March 25, 2022 3:20 PM
*To:* [email protected]
*Subject:* [HP-Agilent-Keysight-equipment] Question on using Prologix GPIB adapter
Hello HP GPIB experts:
I have an experimental setup with a couple of 34401A meters, a power supply and a load which I wish to control by the use of a Prologix GPIB-USB adapter.? It was controlled with a NI device but the drivers are giving me some instability so I thought I would get a new machine and use the Prologix and eliminate all the drivers.
I have it hooked up and can use the John Miles configurator program to set the primary address and issue GPIB commands such as *IDN? and get proper responses from all the connected equipment.
But when I try to communicate from inside an Excel VBA program, I can't get the Prologix to change address or otherwise react to any command.
For example:? having set the Prologix (using the configurator) to address 12, I can issue a "*IDN?" command and get a response from that particular instrument.? But if I send a "++addr 10" command, according to the manual, the Prologix should interpret that as a command to change primary address to 10, but instead it seems to just send that through to the instrument at address 12, which promptly reports an error.
It seems there is something dead simple I am not doing right but I have no idea what.
Does anyone have any idea what I need to do differently?
Peter
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Re: HP83595A/B (HP 8350) ROM firmware required
Hi, ? I checked everything again, and found that one of the EPROMs was an Intel 2732A-4 instead of 2732A-3. I had put a label that hid this information, so I didn't realize it immediately and it was when I started the process again that I saw the error. Now version 9 of the firmware works correctly. ? Another point, the A3 digital PCB of the 83595A plugin is an old version 83525-60007, my 2 other plugins (83522A and 83540A) had the version 83525-60080. I still tested these 2 versions of PCB A3, and it works well in both cases. ? ? Thanks to Lothar and Yue for their comments. ? ? Why don¡¯t you guys compare the part# of the processor board ???? ?
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Re: Question on using Prologix GPIB adapter
To be honest I am not sure exactly what is being sent out on the GPIB.? I do see the "Talk" LED on the Prologix flash and the instrument complain but don't have any capability to observe what happens on the GPIB.
It does appear to be something to do with communicating with the Prologix, but what could it be?
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Show quoted text
On 3/25/2022 6:47 PM, W2HX wrote: Peter, can you confirm that "++ver" is sending "++ver" to the instrument? It shouldn't. Meaning this may not be an issue with changing the address of the target device, but it may be an issue communicating with the prologix itself?
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Re: Question on using Prologix GPIB adapter
Peter, can you confirm that "++ver" is sending "++ver" to the instrument? It shouldn't. Meaning this may not be an issue with changing the address of the target device, but it may be an issue communicating with the prologix itself?
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Re: Agilent 3458A Troubleshooting
Thank you for the pointer Alex. I will look into your suggestion about the MAXIM chip once I get the 3458A going.
I have an ESI Dekapot DP311 kelvin varley voltage divider that is specified as accurate to 0.01%. I can use this to derive accurate low value DC voltages from any known accurate source. I also have a Gertsch RT-60 ratio transformer that will do the same for AC voltages with ~0.001% accuracy at 50Hz.
Cheers,
George
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Alex Sent: Saturday, 26 March 2022 1:15 AM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Agilent 3458A Troubleshooting On Wed, Mar 23, 2022 at 02:01 AM, Labguy wrote:
Having said this, if you can suggest a better voltage reference that doesn¡¯t
cost the earth, I would be most grateful.
If you might be interested in building your own, take a look at the MAX6126AASA30+T 3V 0.02% 1PPM chip (available at Mouser for about $10) to use as a base reference that could then be used to generate lower and higher calibration voltages with precision attenuators/amplifiers. Not sure about the 3458A calibration voltage requirements, but in my case being it a 3457A that (still) is in need of calibration, it requires FS voltages on all ranges (30mV, 300mV, 3V, etc), so the Maxim chip appears to be like a good choice. But obviously voltages would still never be accurate enough for a real calibration as per the book. However like yourself, I am also mainly only interested in long term repeatability/stability of readings, not so much absolute accuracy, so a close but not exact calibration should be good enough for my needs. If my 3457A would have not arrived with a dead backup battery I would have left it alone. Even without calibration its amazing how close (fractions of percentage) the accuracy of the readings of the 3457A still are in comparison to my 3478A, and which also reads extremely close to the 3468A, both still holding their last calibration constants. Not sure this would also be the case of an uncalibrated 3458A.
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