Agilent Technologies E1445A Uživatelská příručka stáhnout pdf (Strana 418)

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4-182 Agilent E6432A Microwave Synthesizer User’s Guide

HPE6432_SetFreqModExtSensitivity

ViStatus HPE6432_SetFreqModExtSensitivity (ViSession

instrumentHandle, ViReal64 HZperVolt);

Purpose

This function, only available on instruments with Option 002, is used to

select the FM sensitivity. It can be set to 10 MHz/V, 1 MHz/V, or

100 KHz/V.

This option is not available on instruments with Option UNG.

Level accuracy with ALC off below 2 GHz is unspecified.

A Power Search may be used to improve level accuracy with ALC off.

Alternately, the IFAttenuator, can be adjusted in 2 dB steps to obtain

the correct level within +/- 1 dB; above 2 GHz or with ALC on, this is

unnecessary.

If the modulation index, defined as the peak frequency deviation

divided by the frequency of the modulating signal, is greater than ~120,

a frequency shift may occur.

Parameter List

instrumentHandle

Variable Type ViSession

This is the ViSession handle that is obtained from the Initialize

function. The instrumentHandle identifies a particular instrument

session.

HZperVolt

Variable Type ViReal64

This parameter specifies the FM sensitivity.

Allowable values: 10E6, 1E6, 100E3

These values correspond to 10 MHz/V, 1 MHz/V, or 100 KHz/V.

Return Value

This return value always returns VI_SUCCESS.

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