Agilent Technologies VXI E1439 - Manual (Page 82)

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Agilent E1439 Programmer's Reference
Functions listed alphabetically
age1439_adc_clock
Specifies the ADC clock source. This description also includes the query function:
age1439_adc_clock_get
VXIplug&play Syntax
#include "age1439".h
ViStatus age1439_adc_clock(ViSession id, ViInt16 adcClock);
ViStatus age1439_adc_clock_get(ViSession id, ViPInt16 adcClockPtr);
Note
This command should be used only for specialized custom clock requirements. Most useful clock
setups can be supplied by
age1439_clock_setup .
Parameters
id is the VXI instrument session pointer returned by the age1439_init function.
adcClock AGE1439_VCXO_INTERNAL selects an internal oscillator within the module. age1439_vcxo_
freq determines which oscillator is used. age1439_vcxo determines whether the internal
oscillator is turned on. You must use all three of the functions to provide the desired internal clock
source.
AGE1439_VCXO_EXT_REF takes an external reference signal on the front panel and uses a
phase-locked loop to convert it to the ADC clock of the module. The ADC clock can be either 100
MHz or 102.4 MHz. The external reference used by the phase lock loop to synthesize the ADC
clock can be either a 10 MHz or 10.24 MHz signal.
AGE1439_EXT_SAMPLE_CLOCK uses an external sample clock selected by age1439_
reference_clock.
adcClockPtr points to the value of the current adcClock.
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 , “Default values” on page 201 ,
“age1439_init” on page 132 , “age1439_clock_setup” on page 78 , “age1439_vcxo” on page 187 ,
“age1439_front_panel_clock_input” on page 131 , “age1439_reference_clock” on page 165 ,
“Using clock and sync” in chapter 3