User`s guide

Agilent E6432A Microwave Synthesizer User’s Guide 4-193

HPE6432_SetIqInput

ViStatus HPE6432_SetIqInput (ViSession instrumentHandle,

ViUInt16 iqInput);

Purpose

This function is used to select the I/Q Input, which is used to select the

way in which the I and Q input signals are supplied to the synthesizer’s

I/Q modulator circuitry.

When set to Normal, the signal that is physically connected to the I

Input on the synthesizer’s hardware front panel is used as the I input

signal, and the signal that is physically connected to the Q Input on the

synthesizer’s hardware front panel is used as the Q input signal.

When set to Swapped, the signal that is physically connected to the I

Input on the synthesizer’s hardware front panel is used as the Q input

signal, and the signal that is physically connected to the Q Input on the

synthesizer’s hardware front panel is used as the I input signal.

When set to Test Tone, both the I and Q inputs are connected to dc

levels which produce only a carrier feed-through signal with no offset

signals. This is used to verify that the I/Q modulator is functioning and

to provide a known signal level at the output of the I/Q modulator

(0 dBm).

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.

iqInput

Variable Type ViUInt16

This parameter specifies whether the I/Q input is set to Normal,

Swapped, or Test Tone.

Allowable values: 0 (Normal), 1 (Swapped), or 2 (Test Tone)

Return Value

This parameter reports the return status of this function.

To obtain further information about the status that is returned, call the

Error Message function or refer to “Error-Code and Fail-Code

Messages” on page 3-93.