Age1439_adc_clock – Agilent Technologies VXI E1439 User Manual

Page 82

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72

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

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