87
5.32. How to set the parameters of FSK
1. Press
Mod
function button, then press
F1
to select Mod.
2. Press
F1
to switch Mod Type to FSK. If the Carrier Waveform is not Sine, the
system will switch it to Sine automatically.
3. Press
button to display the waveform and parameters of the Carrier Waveform.
You can change the parameters, please refer to
“To Output Sine Signals”. Press
button again to return to the Modulation mode interface.
4. Press
F5
to select the source. If the source is External, use the
Ext
Trig/FSK/Burst
connector in the rear panel to input the external signal, then skip
ahead to step (5). If you choose Internal, continue to the steps below.
5. Press
F3
to set FSK Rate. The range is 2 mHz
～
100 kHz (Internal source only).
6. Press
F4
to set Hop Frequency. The range is 2 mHz
～
25kHz.
Term Explanation
FSK Rate:
The frequency at which the output frequency shifts between the carrier frequency and
the Hop frequency (Internal Modulation only).
5.33. PWM (Pulse Width Modulation - only PeakTech
®
4165)
The modulated waveform consists of two parts: the Carrier Waveform and the Modulating
Waveform. PWM can only be used for pulse modulation, so the Carrier Waveform must be
Pulse. In PWM, the width of the Carrier Waveform (Pulse) varies with the instantaneous
voltage of the modulating waveform.
5.34. How to set the parameters of PWM (only PeakTech
®
4165)
1. Press
Mod
function button, then press
F1
to select Mod.
2. Press
F1
to switch Mod Type to PWM. If the Carrier Waveform is not Pulse, the
system will switch it to Pulse automatically.
3. Press
button to display the waveform and parameters of the Carrier Waveform.
You can change the parameters, please refer to
“To Output Sine Signals” on page 67.
Press
button again to return to the Modulation mode interface.
4. Press
F5
to select the source. If the source is External, use the
Modulation In
connector in the rear panel to input the external signal, then skip ahead to step (6). If
you choose Internal, continue to the steps below.
5. Press
F2
to choose Mod Shape, you can choose Sine, Square or Ramp.
