4.7 Modulation Setting and Manipulation
77
WF1973/WF1974
4.7.6 Setting PM
The output phase varies according to the instantaneous value of the modulation signal.
For the manipulation methods that are common with the modulation setting screen, refer to
pp. 70 and 72.
a) PM example
Phase shifting of the output signal grows larger when the modulation signal swings to the
positive side.
Since the phase changes along with time, the instantaneous frequency also changes
simultaneously.
b) Selecting PM
When [Mode] (oscillation mode) is set to
[Modulation], set [Type] (modulation type)
on the 2nd page of the setting screen to
[PM] (PM).
c) Waveforms for which FM is not possible
PM is not possible for noise and DC.
d) Setting items required for PM
Set [Deviation] (peak phase deviation) on the 2nd page of the setting screen.
The output phase changes in the range of ± peak phase deviation.
If [Source] (modulation source) is set to [Int] (internal), set [ModFctn] (modulation
waveform) and [ModFreq] (modulation frequency).
If [Source] (modulation source) is set to [Ext] (external), input the modulation signal to the
external modulation/addition input terminal. In the case of ±1 V input, the prescribed peak
frequency deviation results.
Modulation sync signal
(during internal modulation)
Modulation signal
Output signal
Select [PM] in
[Type] and then
press the ENTER
key
