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Update example/sr760_device.py

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Nelson Darkwah Oppong 2020-11-22 20:37:11 +01:00 committed by GitHub
parent 5dc8aabac5
commit a2c7940a75
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1 changed files with 31 additions and 21 deletions
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52
examples/sr760_device.py
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@ -1,4 +1,5 @@
from plx_gpib_ethernet import PrologixGPIBEthernetDevice
from time import sleep
class SR760Device(PrologixGPIBEthernetDevice):
@ -6,6 +7,16 @@ class SR760Device(PrologixGPIBEthernetDevice):
97.5, 195, 390, 780, 1.56e3, 3.125e3, 6.25e3, 12.5e3, 25e3,
50e3, 100e3]
NUM_BINS = 400
QUERY_SLEEP = 0.1
def query(self, cmd, buffer_size=1024*1024):
self.write(cmd)
sleep(self.QUERY_SLEEP)
return self.read(buffer_size)
def fast_query(self, cmd, buffer_size=1024*1024):
self.write(cmd)
return self.read(buffer_size)
def start(self):
self.write('STRT')
@ -14,19 +25,19 @@ class SR760Device(PrologixGPIBEthernetDevice):
self.write('STCO')
def get_unit(self, trace=0):
i = int(self.query('UNIT? %i' % trace))
i = int( self.query('UNIT? %i' % trace) )
return self.int_to_unit(i)
def set_unit(self, u, trace=0):
self.write('UNIT %s,%i' % (trace, self.unit_to_int(u)))
self.write( 'UNIT %s,%i' % ( trace, self.unit_to_int(u)) )
def get_meas_type(self, trace=0):
i = int(self.query('MEAS? %i' % trace))
i = int( self.query('MEAS? %i' % trace) )
return self.int_to_meas_type(i)
def set_meas_type(self, t, trace=0):
i = self.meas_type_to_int(t)
self.write('MEAS %i,%s' (trace, i))
self.write( 'MEAS %i,%s' (trace, i) )
def get_start_freq(self):
return self._get_freq('STRF')
@ -41,7 +52,7 @@ class SR760Device(PrologixGPIBEthernetDevice):
self._set_freq('CTRF', freq)
def get_span(self):
i = int(self.query('SPAN?'))
i = int( self.query('SPAN?') )
return self.span_level_to_freq(i)
def set_span(self, freq):
@ -51,7 +62,7 @@ class SR760Device(PrologixGPIBEthernetDevice):
def dump(self, trace=0):
data = []
for i in range(SR760Device.NUM_BINS):
data.append(self._dump_bin(trace, i))
data.append( self._dump_bin(trace, i) )
return data
@ -63,11 +74,11 @@ class SR760Device(PrologixGPIBEthernetDevice):
return float(v)
def _set_freq(self, cmd, freq):
self.write('%s %e' % (cmd, freq))
self.write( '%s %e' % (cmd, freq) )
def _dump_bin(self, trace, nbin=0):
x = float(self.query('BVAL? %i, %i' % (trace, nbin)))
y = float(self.query('SPEC? %i, %i' % (trace, nbin)))
x = float( self.fast_query('BVAL? %i, %i' % (trace, nbin)) )
y = float( self.fast_query('SPEC? %i, %i' % (trace, nbin)) )
return [x, y]
@ -75,7 +86,7 @@ class SR760Device(PrologixGPIBEthernetDevice):
def int_to_unit(i):
if (i == 0):
return 'VPk'
elif (i == 1):
elif (i== 1):
return 'Vrms'
elif (i == 2):
return 'dBV'
@ -100,37 +111,36 @@ class SR760Device(PrologixGPIBEthernetDevice):
@staticmethod
def int_to_meas_type(i):
if (i == 0):
return 'spectrum'
return 'Spectrum'
elif (i == 1):
return 'psd'
return 'PSD'
elif (i == 2):
return 'time'
return 'Time'
elif (i == 3):
return 'octave'
return 'Octave'
return None
@staticmethod
def meas_type_to_int(t):
if (t == 'spectrum'):
if (t == 'Spectrum'):
return 0
elif (t == 'psd'):
elif (t == 'PSD'):
return 1
elif (t == 'time'):
elif (t == 'Time'):
return 2
elif (t == 'octave'):
elif (t == 'Octave'):
return 3
return 0
@staticmethod
def span_level_to_freq(l):
return SR760Device.SPAN_FREQS[l]
return SR760Device.SPAN_FREQS[l];
@staticmethod
def freq_to_span_level(f):
for i, sf in enumerate(SR760Device.SPAN_FREQS):
if f <= sf:
return i
if f <= sf: return i
return len(SR760Device.SPAN_FREQS) - 1