Agilent Technologies VXI E1439 User Manual
Page 105
95
Agilent E1439 Programmer's Reference
Functions listed alphabetically
b = block mode, continuos mode to fiber at the fiber transfer rate of 250 Mbytes per
second.
c = continuous mode to local bus
d = continuous mode to fiber at the fiber transfer rate of 106 Mbytes per second.
spectralOrder
This parameter is intended for use only with the IF signal path, providing efficient and transparent
compensation for the effect of down conversion on output data. It does not generate an error if it is
set in baseband mode though spectralOrder remains AGE1439_NORMAL.
means that the spectrum of the output data will be in the same spectral
order as the input signal. That is, if the input signal increases in frequency from "right-to-left", so
does the spectrum of the output data.
means that the spectrum of the output data will be in the reverse spectral
order from the input spectrum. That is, if the input signal increases in frequency from "right-to-
left", the spectrum of the output data decreases in frequency from "right-to-left".
Changing the spectral order in multiple-module systems causes the LO to lose synchronization
with the other modules. Thus, in multi-module systems, the LO’s need to be re-synchronized after
this parameter is changed. See
for more information on synchronizing the
LO.
spectralOrderPtr
points to the current value of the spectralOrder for the current signal path. In baseband mode the
returned value is always AGE1439_NORMAL.
Return Value
AGE1439_SUCCESS indicates that a function was successful.
Values other than AGE1439_SUCCESS indicate an error condition or other important status
condition. To determine the error message, pass the return value to
.
See Also
“Commands which halt active measurements” on page 198
,
,
“age1439_frequency_setup” on page 128
“age1439_meas_control” on page 151
“age1439_clock_setup” on page 78
0
4
12.5
2.5
b,c,d
b,c,d
b,c,d
b,d
1
4
6.25
2.5
b,c,d
b,c,d
b,c,d
b,c,d
0
5
6.25
1.25
b,c,d
b,c,d
b,c,d
b,c,d
decimate
filterBW
sample rate
(Msamples/s)
BW fs=100
MHz
12b real
24b real
12b complex 24b complex