def set_xlim(self, start, stop):
logging.debug(__name__ +
' : setting start freq to %s Hz and stop freq to %s Hz' %
(start, stop))
_signal_hound.initiate(self._device, _signal_hound.sweeping, 0)
_signal_hound.config_center_span(self._device, (start + stop) * 0.5,
stop - start)
def do_set_stopfreq(self, val):
'''
Set STop frequency
Input:
val (float) : Stop Frequency in Hz
Output:
None
'''
logging.debug(__name__ + ' : setting start freq to %s Hz' % val)
_signal_hound.initiate(self._device, _signal_hound.sweeping, 0)
nop, start_freq, bin_size = _signal_hound.query_sweep_info(
self._device)
if nop < 2: nop = 1
#stop = start_freq + (nop-1)*bin_size
new_center = (val + start_freq) * 0.5
new_span = val - start_freq
_signal_hound.config_center_span(self._device, new_center, new_span)
self.get_centerfreq()
self.get_stopfreq()
self.get_span()
def do_set_span(self, span):
'''
Set Span
Input:
span (float) : Span in KHz
Output:
None
'''
logging.debug(__name__ + ' : setting span to %s Hz' % span)
_signal_hound.initiate(self._device, _signal_hound.sweeping, 0)
nop, start_freq, bin_size = _signal_hound.query_sweep_info(
self._device)
start = start_freq
if nop < 2: nop = 2
stop = start_freq + (nop - 1) * bin_size
_signal_hound.config_center_span(self._device, (start + stop) * 0.5,
span)
self.get_startfreq()
self.get_stopfreq()
self.get_centerfreq()
def do_set_centerfreq(self, cf):
'''
Set the center frequency
Input:
cf (float) :Center Frequency in Hz
Output:
None
'''
logging.debug(__name__ + ' : setting center frequency to %s' % cf)
_signal_hound.initiate(self._device, _signal_hound.sweeping, 0)
nop, start_freq, bin_size = _signal_hound.query_sweep_info(
self._device)
if nop < 2: nop = 2
start = start_freq
stop = start_freq + (nop - 1) * bin_size
span = stop - start
_signal_hound.config_center_span(self._device, cf, span)
self.get_startfreq()
self.get_stopfreq()
self.get_span()
