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extreme long time when requesting data from PNA

Question asked by jerrywu on May 10, 2019
Latest reply on May 13, 2019 by jerrywu

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Hello,

I have been using Matlab instrument control toolbox to talk to my N5221B PNA and everything worked perfectly until a recent system reboot. After the system reboot, when I send the read data command CALC:DATA:SNP:PORTs?, it tooks almost two minutes to return the results of a 4-port measurement (I checked the SCPI monitor after I sent in the command). The following command in my script is a bin block read. If I don't wait long enough, it surely leads to an error. I haven't changed any measurement settings, the sweep range and data points keep the same. I am wondering what could be the possible reason causing this extreme delay in returning the measurement data. Any advice will be appreciated. Thanks

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johanericsson

May 10, 2019 5:57 PM

Can you capture an IO Monitor log of the transaction, and then share it with us?

What is the VISA connection string? (are you using GPIB, VXI-11, HiSLIP, sockets?)

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jerrywu @ johanericsson on May 13, 2019 10:59 AM

Thanks for your reply! Below is the log when I ran my code. I am using GPIB for the VISA connection.

2019/05/13 10:46:52.584 [IPC_SCPI] :SENSe1:SWEep:MODE SINGle
2019/05/13 10:46:52.589 [IPC_SCPI] = 3005,
2019/05/13 10:46:52.590 [IPC_SCPI] OPC started: ch = 1, session = Remote Connection 2 - GPIB, info = SENS:SWE:MODE SING/MSG_OPCABLE_SWEEP_COMPLETE, outstanding op's = 1
2019/05/13 10:47:00.347 [IPC_SCPI] OPC completed: info = SENS:SWE:MODE SING/MSG_OPCABLE_SWEEP_COMPLETE, outstanding op's = 0
2019/05/13 10:47:42.440 [IPC_SCPI] :FORMat:DATA REAL 64
2019/05/13 10:47:42.441 [IPC_SCPI] = 0,
2019/05/13 10:47:42.465 [IPC_SCPI] :FORMat:BORDer SWAPped
2019/05/13 10:47:42.466 [IPC_SCPI] = 0,
2019/05/13 10:48:03.684 [IPC_SCPI] :CALCulate1:DATA:SNP:PORTs? 1,2,3,4
2019/05/13 10:48:03.714 [IPC_SCPI] = 0, (stop here for a while)
2019/05/13 10:49:42.032 [IPC_SCPI] < [ 10000000 10028823.7745098 10057730.6300174 10086720.8059934 10115794.542599 10144952.0806874 10174193.6618061 10203519.5281988 10232929.9228075 10262425.0892746 10292005.2719443 10321670.7158655 10351421.6667934 10381258.3711914 10411181.0762334 10441190.0298056 10471285.480509 10501467.6776608 10531736.8712972 10562093.3121747 10592537.2517729 10623068.9422961 10653688.6366756 10684396.5885718 10715193.0523761 10746078.2832132 10777052.5369432 10808116.0701638

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2 Replies

johanericsson May 10, 2019 5:57 PM
Mark Correct
Correct Answer
Can you capture an IO Monitor log of the transaction, and then share it with us?
What is the VISA connection string? (are you using GPIB, VXI-11, HiSLIP, sockets?)
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- jerrywu @ johanericsson on May 13, 2019 10:59 AM
  Mark Correct
  Correct Answer
  Thanks for your reply! Below is the log when I ran my code. I am using GPIB for the VISA connection.
  
  2019/05/13 10:46:52.584 [IPC_SCPI] :SENSe1:SWEep:MODE SINGle
  2019/05/13 10:46:52.589 [IPC_SCPI] = 3005,
  2019/05/13 10:46:52.590 [IPC_SCPI] OPC started: ch = 1, session = Remote Connection 2 - GPIB, info = SENS:SWE:MODE SING/MSG_OPCABLE_SWEEP_COMPLETE, outstanding op's = 1
  2019/05/13 10:47:00.347 [IPC_SCPI] OPC completed: info = SENS:SWE:MODE SING/MSG_OPCABLE_SWEEP_COMPLETE, outstanding op's = 0
  2019/05/13 10:47:42.440 [IPC_SCPI] :FORMat:DATA REAL 64
  2019/05/13 10:47:42.441 [IPC_SCPI] = 0,
  2019/05/13 10:47:42.465 [IPC_SCPI] :FORMat:BORDer SWAPped
  2019/05/13 10:47:42.466 [IPC_SCPI] = 0,
  2019/05/13 10:48:03.684 [IPC_SCPI] :CALCulate1:DATA:SNP:PORTs? 1,2,3,4
  2019/05/13 10:48:03.714 [IPC_SCPI] = 0, (stop here for a while)
  2019/05/13 10:49:42.032 [IPC_SCPI] < [ 10000000 10028823.7745098 10057730.6300174 10086720.8059934 10115794.542599 10144952.0806874 10174193.6618061 10203519.5281988 10232929.9228075 10262425.0892746 10292005.2719443 10321670.7158655 10351421.6667934 10381258.3711914 10411181.0762334 10441190.0298056 10471285.480509 10501467.6776608 10531736.8712972 10562093.3121747 10592537.2517729 10623068.9422961 10653688.6366756 10684396.5885718 10715193.0523761 10746078.2832132 10777052.5369432 10808116.0701638
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extreme long time when requesting data from PNA

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