def __init__(self,
band=None, #[Hz]
ref=None, #(dBm)
bw=None, #(Hz)
shape=None,#(?)
noise=None,#[dBm/Hz,Hz]
gain=None, #[dB,Hz]
gpib=20): #GPIB address
VI.__init__(self, ** _vi)
self._visa = ('GPIB0::%d::INSTR' % gpib, 0)
self._error = (False, 0, "")
self (band, ref, bw, shape, noise, gain) # configure the instrument
def __call__(self, * values, ** options):
"""
band=, ref=, bw=, shape=, noise=, gain= -> signal, noise, peaks, margins, bw
Remembers previous values of all inputs.
"""
values = list (values) + [self[i] for i in self._inputs[len (values):]]
for i, option in enumerate (['band', 'ref', 'bw', 'shape', 'noise', 'gain']):
if options.has_key (option): values[i] = options.pop (option)
((f0, df, signal), (F0, dF, noise)), peaks, margins, bw, self._visa, self._error = VI.__call__(self,
* (values + [self._visa, self._error]), ** options)
return (
(f0, df, list (signal)),
(F0, dF, list (noise)),
list (peaks),
list (margins),
bw)
