SAMPLES = 2**20
M = 1000000
# connect to wsa
dut = WSA()
dut.connect(sys.argv[1])
if len(sys.argv) > 2:
ppb = int(sys.argv[2])
else:
ppb = 1
# setup test conditions
dut.reset()
dut.request_read_perm()
for spp in [min(2**i, 2**16-16) for i in range(9, 17)]:
dut.abort()
dut.flush()
dut.sweep_clear()
s = SweepEntry(
fstart=100 * M,
fstop=7900 * M,
fstep=100 * M,
fshift=0,
decimation=1,
spp=spp,
ppb=ppb,
)
dut.sweep_add(s)
captures = max(SAMPLES/spp, 1)
dut.sweep_iterations(0) # continuous
dut.sweep_start(spp)
class R5500(Instrument):
"""
Driver for ThinkRF R5500 to run in the sweep mode. This modes allows
arbitrary span instead of the native IBW of the SA.
"""
def __init__(self,
name: str,
address: str,
**kwargs: Any) -> None:
super().__init__(name, **kwargs)
self.dut = WSA()
self.addr = address
self.dut.connect(address)
self.dut.request_read_perm()
# Basic settings
self._rfemode = 'SH'
self._fstart = 5e9
self._fstop = 6e9
self._rbw = 5e3
self._gain = 'high'
self._attenuation = 0
self._average = 10
self._decimation = 1
self._reflevel = 0
self.triggered = False
self._acquired_data = None
self.add_parameter('rfe_mode',
unit = '',
initial_value= 'SH',
label = 'Input Mode',
get_cmd = self.get_rfe_mode,
set_cmd = self.set_rfe_mode,
get_parser = str)
self.add_parameter('attenuation',
unit = 'dB',
initial_value = 0.0,
label = 'attenuation',
get_cmd = self.get_attenuation,
set_cmd = self.set_attenuation,
get_parser = float,)
self.add_parameter('gain',
unit = '',
label = 'gain',
get_cmd = self.get_psfm_gain,
set_cmd = self.set_psfm_gain,
get_parser = str)
self.add_parameter('average',
unit = '',
label = 'average',
get_cmd = self.get_average,
set_cmd = self.set_average,
get_parser = int)
self.add_parameter('rbw',
unit = 'Hz',
label = 'resolution bandwidth',
get_cmd = self.get_rbw,
set_cmd = self.set_rbw ,
get_parser = float)
self.add_parameter('f_start',
unit='Hz',
label='fstart',
get_cmd= self.get_fstart,
set_cmd= self.set_fstart,
get_parser = float)
self.add_parameter('f_stop',
unit='Hz',
label='fstop',
get_cmd = self.get_fstop,
set_cmd= self.set_fstop,
get_parser = float)
self.add_parameter('n_points',
unit='',
get_cmd= self.get_npoints,
set_cmd= '',
get_parser = int)
self.add_parameter('freq_axis',
unit='Hz',
label='Frequency',
parameter_class=Setpoints,
startpar=self.f_start,
stoppar=self.f_stop,
npointspar=self.n_points,
vals=Arrays(shape=(self.n_points.get_latest,)))
self.add_parameter('spectrum',
unit='dBm',
setpoints=(self.freq_axis,),
label='Noise power',
parameter_class=SpectrumArray,
vals=Arrays(shape=(self.n_points.get_latest,)))
def get_npoints(self):
'''
Configs the sweep and collects the data. Returns length of data for
generating the setpoints.
'''
fstart = self.f_start()
fstop = self.f_stop()
rbw = self.rbw()
device_settings = { 'attenuator' : self.attenuation() }
mode = self.rfe_mode()
average = self.average()
self.dut.reset()
self.dut.psfm_gain(self._gain)
self.dut.spp(1024)
self.dut.ppb(4)
self.dut.pll_reference('EXT')
try:
sweepdev = SweepDevice(self.dut)
except TypeError:
self.dut.abort()
self.dut.flush()
self.dut.disconnect()
self.dut.connect(self.addr)
self.dut.reset()
self.dut.psfm_gain(self._gain)
self.dut.spp(1024)
self.dut.ppb(4)
self.dut.pll_reference('EXT')
finally:
try:
sweepdev = SweepDevice(self.dut)
except TypeError:
self.dut.connect(self.addr)
self.dut.abort()
self.dut.flush()
self.dut.reset()
self.dut.psfm_gain(self._gain)
self.dut.spp(1024)
self.dut.ppb(4)
self.dut.pll_reference('EXT')
sweepdev = SweepDevice(self.dut)
sweepdev.real_device.flush_captures()
fstart, fstop, spectrum = sweepdev.capture_power_spectrum(fstart=fstart,
fstop=fstop,
rbw=rbw,
device_settings=device_settings,
mode=mode,
average = average)
self._acquired_data = dict({'fstart':fstart,
'fstop' : fstop,
'spectrum' : spectrum,
'npts' : len(spectrum) })
self.f_start(fstart)
self.f_stop(fstop)
self.dut.sweep_stop()
self.dut.abort()
self.dut.flush_captures()
return len(spectrum)
def get_fstart( self ):
return self._fstart
def set_fstart( self, fstart ):
self._fstart = fstart
def get_fstop( self ):
return self._fstop
def set_fstop( self, fstop ):
self._fstop = fstop
def get_average( self ):
return self._average
def set_average( self, average ):
self._average = average
def get_rbw( self ):
#TODO : update rbw from device
return self._rbw
def set_rbw(self, rbw):
#TODO : inject rbw to device
self._rbw = rbw
def get_rfe_mode( self ):
return self._rfemode
def set_rfe_mode( self, rfemode ):
self._rfemode = rfemode
self.dut.rfe_mode(self._rfemode)
def get_attenuation( self ):
return self._attenuation
def set_attenuation( self, atten ):
self._attenuation = atten
self.dut.attenuator( self._attenuation )
def get_psfm_gain( self ):
return self._gain
def set_psfm_gain( self, gain ):
self._gain = gain
self.dut.psfm_gain( self._gain )
# connect to wsa
dut = WSA()
dut.connect(sys.argv[1])
if len(sys.argv) > 2:
ppb = int(sys.argv[2])
else:
ppb = 1
# setup test conditions
dut.reset()
dut.request_read_perm()
for spp in [min(2**i, 2**16-16) for i in range(7, 17)]:
dut.abort()
dut.flush()
dut.sweep_clear()
s = SweepEntry(
fstart=100 * M,
fstop=7900 * M,
fstep=100 * M,
fshift=0,
decimation=1,
attenuator=0,
spp=spp,
ppb=ppb)
dut.sweep_add(s)
captures = max(SAMPLES/spp, 1)
dut.sweep_iterations(0) # continuous
dut.sweep_start(spp)