Tektronix 071-1631-04, AFG3000 Series Adjusting Parameters of Two Channel Signals (dual-channel model only)

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.
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