User's Manual

Aborting a Calibration in Progress

Sometimes it may be necessary to abort a calibration after the procedure

has already been initiated. You can abort a calibration at any time by

pressing any front-panel key (except

Shift-Cancel ). When performing a

calibration from the remote interface, you can abort a calibration by

issuing a remote interface device clear message or by pressing the

front-panel

LOCAL key.

Frequency and Burst Rate Adjustment

The function generator stores two calibration constants related to

frequency and burst rate output. The constants are calculated from the

adjustment value entered and are stored at the completion of each setup.

1 Use a frequency meter to measure the function generator output

frequency for each setup in the following table. These adjustments use

a 50

W output termination.

Nominal Output

SETUP FREQUENCY AMPLITUDE

00 * 1.00 kHz 10 Vpp

Adjustment for main frequency

generator, sine wave output

01 500 Hz 10 Vpp

Adjustment for burst rate timing,

pulse output.

2 Use the CALIBRATE menu to adjust the displayed frequency at each

setup to match the measured frequency and enter the value.

3 Perform the Frequency Verification procedures on page 56.

* A new calibration (SETUP 86 – Rev 4.0) has been added as an alternative to SETUP 00.

The new calibration outputs a 10 MHz sine wave, rather than the 1 kHz signal used for

SETUP 00. The new calibration reduces slew rate dependent errors in the frequency

measurement and is especially important when calibrating the Phase-Lock Assembly

(Option 001). Note that either setup is sufficient to calibrate the carrier frequency and

you don’t need to perform both.

Chapter 4 Calibration Procedures

Aborting a Calibration in Progress