134
Agilent E1439 Programmer's Reference
Functions listed alphabetically
age1439_input_autozero
Nulls out the input dc offset voltage (applies to baseband input configuration only).
VXI
plug&play
Syntax
#include "age1439".h
ViStatus age1439_input_autozero(ViSession
id
);
Description
age1439_input_autozero
updates a table of dc offset corrections to be used with each signal
path. The applicable correction from this table is automatically added to the input offset parameter
to achieve the correct dc offset value. Because of the length of time needed to execute this
function, it is not automatically called when the module is reset. Thus, the user program is
responsible for explicitly initiating the auto zero. This function should be called at least once after
the temperature of the module has stabilized. The interval between calls after that depends on the
importance of dc accuracy in the user application. It is not necessary to call the auto zero function
for every change of input setup parameters since the correction table maintains values for all setup
conditions.
Note
Calling
age1439_input_autozero
aborts any measurement already in progress and eliminates LO
phase coherence and filter synchronization in a synchronous multi-module system. See the
age1439_filter_sync
and
age1439_frequency_sync
functions for details on how to re-establish
LO phase coherence and filter synchronization.
Calling this function deletes any saved state and halts any measurement or fiber transfer.
Parameters
id
is the VXI instrument session pointer returned by the
age1439_init
function.
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
“age1439_error_message” on
page 102
.
See Also
“Commands which halt active measurements” on page 198
,
“age1439_init” on page 132
,
“age1439_input_setup” on page 141
,
“age1439_input_offset_save” on page 136
,
“age1439_
filter_sync” on page 123
,
“age1439_frequency_setup” on page 128
Содержание E1439
Страница 6: ...6...
Страница 10: ...10 Contents...
Страница 11: ...1 1 Installing the Agilent E1439...
Страница 18: ...8 Installing the Agilent E1439 To transport the module...
Страница 19: ...2 2 Getting Started with the Agilent E1439...
Страница 28: ...18 Getting Started with the Agilent E1439 To use the example programs...
Страница 29: ...3 3 Using the Agilent E1439...
Страница 63: ...4 4 Agilent E1439 Programmer s Reference...
Страница 217: ...5 5 Module Description...
Страница 228: ...218 Module Description Block diagram and description...
Страница 229: ...6 6 Replacing Assemblies...
Страница 234: ...224 Replacing Assemblies Replaceable parts To remove the top cover...
Страница 235: ...225 Replacing Assemblies Replaceable parts To remove the M1 M2 assemblies...
Страница 236: ...226 Replacing Assemblies Replaceable parts...
Страница 238: ...228...
Страница 244: ...Index 234...