usually as john already pointed out NI adapters are pretty straightforward to set up , there are however a few things you might want to look at :
the first one is to make sure you only have one VISA installed ,? if you install NI VISA and Agilent VISA you might run into problems ,? both VISA can coexist but you have to set them up correctly , also make sure you have no firewall or similar program set up that monitors your USB port , i was banging my head on the wall after buying a new laptop and tried to get my AWR software to work it did not recognize the sentinel USB key even though i had all the correct drivers installed it turned out a setting in the windows firewall ( defender )?
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(Actually, that decision may have been made at a time when Unisys was swinging their you-know-what around demanding patent royalties on .GIF, and .PNG wasn't in widespread use yet. ?I think that was the conclusion the last time the subject came up.) ? -- john, KE5FX ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of John Miles
Sent: Monday, February 28, 2022 7:47 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Newbie to KE5FX? >From: [email protected] [mailto:[email protected]] On Behalf Of Lou Blasco >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. ? That's a new one on me, I'm afraid.? Usually the NI adapters are very straightforward to set up -- you just install the NI488 software and go.? The GPIB Toolkit defaults to GPIB0, so there is no need to edit anything, or even to run the GPIB configurator app at all.? ? If your adapter shows up as GPIB1, for instance, or if you have more than one adapter that you want to switch between, then you will need to select it and hit 'Update .INI'.?? But I haven't run into a situation where there is no GPIBx identifier at all, and wouldn't expect the software to do anything useful in that case. ? >From: [email protected] [mailto:[email protected]] On Behalf Of Matt Harris
>Unfortunately, JPEG format graphic files are far less than ideal for >this type of graphic. John's plotter emulator has been my go-to every >time I need to grab a screen.? It makes it easy to manipulate or drop >directly into a document from a GUI environment.
>Thanks, Mr. Miles!
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Re: HP8640B RF Fails Several Seconds After Power Up
Get a can of freeze spray and cool any circuit areas you think may be involved in the problem.? I - and my employees when I owned a repair shop - tracked down MANY a problem that way.? If cooling a specific circuit board fixes the problem, then start confining your cooling to specific areas of the board.? Heat guns are also a useful troubleshooting instrument.
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>From: [email protected] [mailto:[email protected]] On Behalf Of Lou Blasco >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. ? That's a new one on me, I'm afraid.? Usually the NI adapters are very straightforward to set up -- you just install the NI488 software and go.? The GPIB Toolkit defaults to GPIB0, so there is no need to edit anything, or even to run the GPIB configurator app at all.? ? If your adapter shows up as GPIB1, for instance, or if you have more than one adapter that you want to switch between, then you will need to select it and hit 'Update .INI'.?? But I haven't run into a situation where there is no GPIBx identifier at all, and wouldn't expect the software to do anything useful in that case. ? >From: [email protected] [mailto:[email protected]] On Behalf Of Matt Harris
>Unfortunately, JPEG format graphic files are far less than ideal for >this type of graphic. John's plotter emulator has been my go-to every >time I need to grab a screen.? It makes it easy to manipulate or drop >directly into a document from a GUI environment.
>Thanks, Mr. Miles! _._,_._,_ De nada. :) ? And yeah, death to .JPG.? Can't imagine why they would have used that format. ? -- john, KE5FX ?
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Re: HP8640B RF Fails Several Seconds After Power Up
I have not checked for bad solder joints on the pass transistor. I will give all of them a close inspection tomorrow afternoon.?
One thing I did notice today, is that along with the odd 44.6V behavior, the -20v directly at the connection on the RF oscillator drops significantly at the same time the RF fails. So this is a new clue. Not sure how this would also affect the 44.6V supply, but it seems this would likely cause the oscillator to fail. Perhaps there's a bypass capacitor failing somewhere on the rail. Time to take a closer look at the smaller electrolytics scattered around on the various boards.? Perhaps a marginal edge connector somewhere.?
I guess I have reason to hope the main RF oscillator is not at fault, unless there's a faulty component drawing the rail down within that circuit. I did not notice any excessive heat forming in that area, so I suspect not.?
The search continues.?
Scott
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I believe the most important feature of "probe wire" is that it have very fine strands, so that it doesn't break internally with a lot of flexing.
And of course, the insulation needs to be appropriate to the peak voltage levels.
Pete
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Re: 8350B *restoration adventure?*
Hi Ruben, I took some measurements on my 8350B, with or without plugin 83522A or 83595A. I could not measure the DC current for the ±15V, but I have the other information that can help you to evaluate the compatibility when replacing the transformer of your 8350B. ? The DC or AC voltages were measured with a 34465A. AC main line current measured with a KILL A WATT model P4400.01. The ripple, with a Micsig DP10013 differential probe and a Tektronix DPO3014 oscilloscope. The AC current, with a HP1146A probe and a 34465A. The DC current with a Keysight U1282A. ? Hopefully this information can help you. ? Yves ? ? 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
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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??
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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
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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?
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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.
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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
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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
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-------- 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. 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 -------- 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]() 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 – then in NI-MAX utility you can see the device and clicking on it opens it’s details window – 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 ? ? 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? ? 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?
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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.
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Re: Agilent ESA or ESA-L power supply.
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?
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looking for 8753D/E/ES Parts
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?
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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
|
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.
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 -------- 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]() 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 – then in NI-MAX utility you can see the device and clicking on it opens it’s details window – 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 ? ? 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? ? 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?
|
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
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Show quoted text
-------- 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.?
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 – then in NI-MAX utility you can see the device and clicking on it opens it’s details window – 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 ? ? 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? ? 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?
|
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.?
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 – then in NI-MAX utility you can see the device and clicking on it opens it’s details window – 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 ? ? 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? ? 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?
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Re: Agilent ESA or ESA-L power supply.
Hi Lothar.
I receive the package from artekmedia on 25/2 but no references to the power supply.
Thanks anyway.
Rui Martins?
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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
?
?
I need the supply schematics for E 4401 analyzer.
I think is the same for all the ESA or ESA-L spectrum Analyzers.
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Jim Allyn - N7JA
Flannel Tuba
saipan59 (Pete)
KB2LMN
Alex_03