User`s guide

User’s and Service Guide Supplement 3

E4438C Option HEC

Verifying Option HEC Functionality

The following procedure verifies that the Option HEC external clock feature is functioning

correctly. This procedure creates a single sideband carrier signal using a baseband

generator. The signal appears as a single tone offset from the carrier by 500 kHz. The

external clock frequency is then reduced from 400 MHz to 200 MHz or by a factor of 2. The

tone offset from the carrier is reduced by the same factor and appears at a 250 kHz offset.

Equipment Required

For best results, the Agilent Technologies equipment listed below is recommended.

• E4433B

(ESG-B Signal Generator)

• E4440A (PSA Performance Signal Analyzer)

• BNC Cables

•SMA Cable

• various adapters

Connecting the System for Verification

1. Connect the E4438C Option HEC RF Output on the front panel to the E4440A RF Input

on the front panel using standard cables and the necessary adapters. Refer to Figure 1.

Figure 1 Front Panel Connections

1. Any Agilent Approved Signal Source is acceptable. The quality of the external clock signal translates

directly to the output integrity of the ARB.

RF Out

RF In