User's Manual

Operating Basics

52 AFG3000 Series Quick Start User Manual

Adjusting Parameters of Two Channel Signals (dual-channel model only)

Phase

The AFG3000 series uses phase continuous method to change frequency. When you change a frequency of a channel, it

will affect the phase relationship between the two channels.

For example, the instrument is generating a 5 MHz sine waveform for both CH1 and CH2 and the phase is adjusted between

the two channels. If you change the CH2 frequency to 10 MHz and then return it to 5 MHz, the CH2 phase does not return

to its initial condition. To adjust the phase relationship between the two channels, you need to stop signal generation and

restart it. The instrument provides a function called "Align Phase" to adjust the phase relationship.

1. In this example, a 5 MHz continuous

sine waveform is used. Confirm that

both phases are set to 0 degrees.

2. Change the CH1 frequency to 10 MHz,

and then back to 5 MHz. In this state,

the CH2 phase does not return to its

initial condition.

3. To align the phase of two channel

signals, push the Align Phase bezel

button.

4. When you push the Align Phase but-

ton, the instrument will stop the signal

generation, adjust the phases of both

channels, and automatically restart the

signal generation.