Re: Error in accessing USB based DSO via E5810B Gateway

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Hi Sarthak,

I am not sure anyone has ever tested using the asyn VXI-11 support for USB devices over the E5810B gateway or other models.  I know that it has been used for GPIB over such gateways, and for built-in VXI-11 support in devices.  It is quite possible that there are limitations in the asyn VXI-11 driver that prevent it from working with USB.  If you manage to figure it out I'll be happy to look at a pull request.

Could you open this as an issue in the Github asyn repository?  https://github.com/epics-modules/asyn/issues

Thanks,

Mark

---

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Sarthak Gupta via Tech-talk <tech-talk at aps.anl.gov>
Sent: Thursday, October 1, 2026 4:13 AM
To: GAGET Alexis <ALEXIS.GAGET at cea.fr>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: Error in accessing USB based DSO via E5810B Gateway

Hello Alexis,

The PVs are not working if the target instrument is connected using the
USB port on the E5810B gateway. The PVs are working if the same target
instrument is connected using either the GPIB or serial port of the
gateway.

EPICS uses vxi11 when communicating with the E5810B gateway. I am trying
to understand if any specific configuration is required on EPICS side
when we connect the target instrument on the USB port of the E5810B or
is there some limitation from the E5810B side.

I will investigate the packets using wireshark. It's a good idea.

And thanks for the tip. I am aware of the 'Terminator' field. This is
just a single/two record database to test the E5810B.

On 23-09-2026 02:29 PM, GAGET Alexis wrote:
> Hello Sarthak,
> I don't understand the error fault but just in case.
>
> If I understood well, you have working PVs except from the IDN command
> ?
>> GPIB and serial ports of E5810B are working correctly with EPICS
>
> The IDN seems to be process only at start with PINI, have you tried
> process it manually after ?
>  caput $(P)$(DEVICE)IDN.PROC 1 should work, or dbtr in the iocShell
> if it worked that way, it's probably an initialization issue.
>
> You can also check at the packet you send and receive using wireshark
> to investigate. It's ASCII so it should be readable.
>
> Regarding your command, just a tip. To avoid writing LF in every
> command you have you can define the field Terminator at the beginning
> of your protocol file. see
> https://urldefense.us/v3/__https://paulscherrerinstitute.github.io/StreamDevice/protocol.html*var__;Iw!!G_uCfscf7eWS!bWS0ZFaRBlwro1DOVij-0PadLo8jb827gPFIGCti-zeoxJbOI2KBOxZ_pjWZpIewNhhu8hQuj1e7mdF_tzbKJ1qbUFVUKE6m$
> query_idn {
>      out "*IDN?" LF;
>       in "%s" LF;
> }
>
> Regards
>
> Alexis
>
> -----Message d'origine-----
> De : Tech-talk <tech-talk-bounces at aps.anl.gov> De la part de Sarthak
> Gupta via Tech-talk
> Envoyé : mercredi 16 septembre 2026 13:03
> À : tech-talk at aps.anl.gov
> Objet : Error in accessing USB based DSO via E5810B Gateway
>
> Hello,
>
> I am trying to access a USB based DSOs (Tektronics TDS 2014B or Agilent
> DSO1024A) using Keysight/Agilent E5810B Ethernet gateway. My
> connection string is as follows:
>
> vxi11Configure("L2", "10.42.0.10", 0, "0.0",
> "usb0[1689::872::C039225::0]", 0, 0)
>
> However, on starting the IOC, I am getting following errors/warnings:
>
> L2 vxiBusStatus error VXI: operation not supported
> 2026/09/16 16:14:42.685 L2 asynGpib:srqPoll srqStatus error error
>
> There is no response from following record:
>
> record (stringin, "$(P)$(DEVICE)IDN")
> {
>      field (SCAN, "Passive")
>      field (DTYP, "stream")
>      field (INP,  "@e5810b_gateway.proto query_idn $(PORT) $(ADDR)")
>      field (PINI, "YES")
> }
>
> Corresponding stream protocol:
>
> query_idn {
>      out "*IDN?" LF;
>       in "%s" LF;
> }
>
> GPIB and serial ports of E5810B are working correctly with EPICS.
> Also, the DSOs are responding when they are directly accessed using
> PyVISA-py library.
>
> Kindly guide me.
>
> With Regards
> --
> Sarthak Gupta
> Scientific Officer F
> Laser Electronics and Controls Section
> Laser Control & Instrumentation Division Raja Ramanna Center for
> Advanced Technology Department of Atomic Energy Indore (MP) 452013
> Ph: +91.731.2488422, +91.731.2442673

With Regards
--
Sarthak Gupta
Scientific Officer F
Laser Electronics and Controls Section
Laser Control & Instrumentation Division
Raja Ramanna Center for Advanced Technology
Department of Atomic Energy
Indore (MP) 452013
Ph: +91.731.2488422, +91.731.2442673