A question about hardcopy GPIB remote control?

[xiaochouyu]

     This is final data

[crossrulz]

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@xiaochouyu wrote:

the data size  is 72676kb,but only read out  4096kb.So I think the <block>size only 4096kb.

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I think that is a VISA limitation, not your instrument.  Use a loop to continuously read until you read all of the data.

[xiaochouyu]

This is a good idea, but how to read it circularly?I have tried continuous reading, but only the first one can work.

Can you tell me the specific function?

[xiaochouyu]

A related question. But it still can't solved.

如何使用VISA从串口读取多于4096个字节的数据

[Albert.Geven]

Use a read i a while loop.

Read 4096 bytes max a time.

Only the last should have the correct number of byetes left.

[ronke]

please refer this link and download the source code.

https://www.codeproject.com/Articles/872469/Instrument-Snapshot-How-to-Acquire-and-Render-Scre

[xiaochouyu]

The question is not  loop.but is how to read correctly！

such as this code：

Dim fanal As String = ""
Do
status = viRead(vi, strRes, 4096, retCount) '太长时读出为空，容易卡死
Dim x As Integer = Val(Mid(strRes, 2, 1))
Dim y As Integer = Val(Mid(strRes, 3, x))
strRes = Mid（strRes， x + 3， y）
fanal = fanal & strRes

Loop Until （retCount < 4096）

read only 16 bytes！

if use

status = viReadToFile(vi, "D:\YouName.WMF", 4096, retCount) 

the result only first viReadToFile can work！

[xiaochouyu]

can't connect “FSEA30”,may be  too old. and the source is no help.

thank you

[ronke]

You may try to download the printcapture software.

http://www.printcapture.com/equiplist.html#testequipment

the Rohde Schwarz FSEA Spectrum Analyzer is in the support model list.

[xiaochouyu]

I used to use it. it only supports NI GPIB drive. can't supports other driver such as Agilent.