def __setFreq(self):
self.i_ch.attrs['frequency'].value = iiol._M2Str(abs(self._freq))
# read back the actual value
self._freq = copysign(self.getFreq(), self._freq)
logging.debug('i_ch:< '+iiol._M2Str(abs(self._freq)))
self.q_ch.attrs['frequency'].value = iiol._M2Str(abs(self._freq))
logging.debug('q_ch:< '+iiol._M2Str(abs(self._freq)))
def _set_SamplingFreq(self, value):
"""set internal sampling freq in MHz"""
# 2.1<value<30, use interpolation for lower sampling rates
try:
self.phy_rx.attrs['sampling_frequency'].value = _M2Str(value)
except OSError:
print('value out of range:', value)
def setFreq(self, f):
"""set to approximately the frequency given in MHz"""
# approx because the actual freq is constrained by the algorithm
# read back from the device to determine the actual value set
self._freq = f
# must be 0 <= f < fs/2
if abs(f)>self.getSamplingFreq()/2:
half_fs = '{:2.3f}'.format(self.getSamplingFreq()/2)
raise ValueError('frequency not within +/-Fs/2 i.e '+half_fs+'MHz')
# for positive frequencies phase(Q) = phase(I) - 90
# for negative frequencies abs(f) and phase(Q) = phase(I) + 90
logging.debug('freq:>' + iiol._M2Str(f))
self.__setFreq()
self.__setPhase()
def _set_txBW(self, value):
self.phy_tx.attrs['rf_bandwidth'].value = _M2Str(value)
def _set_txLoFreq(self, value):
self.phy.find_channel('TX_LO').attrs['frequency'].value = _M2Str(value)
def _set_rxBW(self, value):
"""set receiver analogue RF bandwidth in MHz"""
self.phy_rx.attrs['rf_bandwidth'].value = _M2Str(value)
def _set_rxLoFreq(self, value):
"""set receiver LO frequency property in MHz"""
self.phy.find_channel('RX_LO').attrs['frequency'].value = _M2Str(value)
def _set_SamplingFreq(self, value):
self.phy_rx.attrs['sampling_frequency'].value = _M2Str(value)
