Agilent Technologies E1439, User Manual

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141
Agilent E1439 Programmer's Reference
Functions listed alphabetically
age1439_input_setup
Sets all the analog input parameters. This description also includes information on the following
functions which set or query the input parameters individually:
age1439_input_alias_filter selects or bypasses the built-in analog anti-alias filter
age1439_input_alias_filter_get gets the anti-alias filter state
age1439_input_coupling selects ac or dc input coupling
age1439_input_coupling_get get the input coupling type
age1439_input_range sets the full scale range
age1439_input_range_get gets the input range
age1439_input_signal connect/disconnect the input signal to the input amplifier
age1439_input_signal_get gets the input buffer amplifier state
age1439_input_signal_path selects a baseband or IF signal path
age1439_input_signal_path_get gets the current signal path
VXI plug&play Syntax
#include "age1439".h
ViStatus age1439_input_setup(ViSession id , ViInt16 signalPath , ViInt16 range , ViInt16
coupling , ViInt16 antiAlias , ViInt16 signal );
ViStatus age1439_input_alias_filter(ViSession id , ViInt16 antiAlias );
ViStatus age1439_input_alias_filter_get(ViSession id , ViPInt16 antiAliasPtr );
ViStatus age1439_input_coupling(ViSession id , ViInt16 coupling );
ViStatus age1439_input_coupling_get(ViSession id , ViPInt16 couplingPtr );
ViStatus age1439_input_range(ViSession id , ViInt16 range);
ViStatus age1439_input_range_get(ViSession id , ViPInt16 rangePtr );
ViStatus age1439_input_signal(ViSession id , ViInt16 signal );
ViStatus age1439_input_signal_get(ViSession id , ViPInt16 signalPtr );
ViStatus age1439_input_signal_path(ViSession id , ViInt16 signalPath );
ViStatus age1439_input_signal_path_get(ViSession id , ViPInt16 signalPathPtr );
Parameters
id is the VXI instrument session pointer returned by the age1439_init function.
antiAlias determines whether or not to use the built-in analog anti-alias filter. This filter only applies to
baseband measurements. In IF mode the antialias filter is always turned on. The
antialias
parameters always set the baseband anti-alias filter regardless of the signal path.
AGE1439_ANTIALIAS_ON inserts a sharp-cutoff 36 MHzlow-pass filter ahead of the analog-
to-digital converter. You should leave the filter on at all times to insure band-limited, anti-aliased
data.
AGE1439_ANTIALIAS_OFF bypasses the low-pass filter.
antiAliasPtr points to the current value of the antiAlias parameter in the current signal path. Therefore, in IF
mode this function always returns AGE1439_ANTIALIAS_ON.
coupling specifies the ac or dc coupling mode of the input. This parameter applies to the baseband input
configuration only.
AGE1439_DC connects the input directly to the 50 Ohm buffer amplifier. Although dc coupling
can be selected in both baseband and IF signalPath , it has no effect in the IF path because the
signal is ac coupled after the input section.