MP7505 Series User Manual
How to set the parameters of PWM
(1) Set carrier wave shape:
PWM can only be used to modulate pulse, so the carrier wave must be Pulse.
Press to set the carrier wave shap.
(2) Press the Mod function key, then press the Type softkey, turn the rotary control
to select PWM, press the OK softkey.
Note: If Pulse wave has not been selected, PWM in the menu is unavailable.
(3) Set carrier wave parameters:
Press to display the waveform and parameters of the carrier wave. You
can change the parameters of the carrier wave. Press Mod to return to the
modulation mode interface.
(4) Select modulating wave source:
Press the Source softkey to select the modulating wave source.
If you select External, use the Mod/FSK/Trig connector at the rear panel to
input the external modulating signal, then skip ahead to step (7).
If you select Internal, continue with the following steps.
(5) Select modulating wave shape:
Press the Shape softkey, then press the Sine, Square, Ramp, Noise, or Arb
softkey to select the modulating wave.
(6) Set modulating wave frequency:
Press the PWM Frequency softkey to set the modulating wave frequency. The
range is 2 mHz – 1 MHz (for internal source only).
(7) Set duty cycle deviation:
Duty cycle deviation is the deviation (in %) of the modulating wave duty cycle
relative to the original pulse duty cycle. Press the Deviation softkey to set the
PWM duty cycle deviation.
Duty cycle deviation range: 0% ≤ deviation ≤ upper limit (upper limit is carrier
duty cycle or 100% minus carrier duty cycle, the smaller of the two).
ASK (Amplitude Shift Keying)
Amplitude Shift Keying modulation is a modulation technique that shifts the output
signal amplitude between two amplitudes: the carrier amplitude and modulating
amplitude. Carrier wave amplitude shifts to the modulating amplitude with the
specified ASK rate, and then returns to the original amplitude. The ASK user
interface is shown below.
To Next Page
Loading...