get_Frequency about qulab

[feihoo87]

Check result of the following code

import visa

pna_addr = 'Your PNA Address'

rm = visa.ResourceManager()
pna = rm.open_resource(pna_addr)
print(pna.query('CALC:X?'))

[Lagikna]

---------------------------------------------------------------------------
VisaIOError                               Traceback (most recent call last)
<ipython-input-56-0d079e9273cb> in <module>()
      5 rm = visa.ResourceManager()
      6 pna = rm.open_resource(pna_addr)
----> 7 print(pna.query('CALC:X?'))

B:\WinPython-64bit-3.6.3.0Qt5\python-3.6.3.amd64\lib\site-packages\pyvisa\resources\messagebased.py in query(self, message, delay)
    562         if delay > 0.0:
    563             time.sleep(delay)
--> 564         return self.read()
    565 
    566     def ask(self, message, delay=None):

B:\WinPython-64bit-3.6.3.0Qt5\python-3.6.3.amd64\lib\site-packages\pyvisa\resources\messagebased.py in read(self, termination, encoding)
    411         if termination is None:
    412             termination = self._read_termination
--> 413             message = self._read_raw().decode(enco)
    414         else:
    415             with self.read_termination_context(termination):

B:\WinPython-64bit-3.6.3.0Qt5\python-3.6.3.amd64\lib\site-packages\pyvisa\resources\messagebased.py in _read_raw(self, size)
    384                     logger.debug('%s - reading %d bytes (last status %r)',
    385                                  self._resource_name, size, status)
--> 386                     chunk, status = self.visalib.read(self.session, size)
    387                     ret.extend(chunk)
    388             except errors.VisaIOError as e:

B:\WinPython-64bit-3.6.3.0Qt5\python-3.6.3.amd64\lib\site-packages\pyvisa\ctwrapper\functions.py in read(library, session, count)
   1582     buffer = create_string_buffer(count)
   1583     return_count = ViUInt32()
-> 1584     ret = library.viRead(session, buffer, count, byref(return_count))
   1585     return buffer.raw[:return_count.value], ret
   1586 

B:\WinPython-64bit-3.6.3.0Qt5\python-3.6.3.amd64\lib\site-packages\pyvisa\ctwrapper\highlevel.py in _return_handler(self, ret_value, func, arguments)
    186 
    187         if ret_value < 0:
--> 188             raise errors.VisaIOError(ret_value)
    189 
    190         if ret_value in self.issue_warning_on:

VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.

[feihoo87]

Is any other SCPI command executed correctly? Try SYST:ERR? to find out the problem.

[Lagikna]

这个R&S的矢量网分，其他的get_Trace可以读出，但会报一个远程错误：queue overflow，设置power时不成功仪器会报一个 numeric data not allowed的错误

[feihoo87]

I don't have the manual of this one, you should write a driver yourself.

[Lagikna]

是有些不一样，设置power那个我把“POW1”改成“POW”就好了没有错误
没有CALC:X?这条命令，我自己新建个改改