5.9.5 QPSK Rate
When internal modulation source is selected, press
[Mod] > Rate
softkey to set the rate at which
the output phase shifts between "carrier phase" and three "modulation phases".
Use the numeric keypad or direction keys and knob to input the desired rate value.
The rate range is from 2mHz to 1MHz and the default is 100Hz.
5.9.6 Modulation Phase
Press
[Mod]> Phase1
or
Phase2/Phase3
softkeys to set the parameter.
Use the numeric keypad or direction keys and knob to input the desired amplitude value.
The phase range is from 0º to 360º.The default is 180°. The default values for phases 1, 2,
and 3 are 45°, 135°, and 225°, respectively.
5.10 3FSK Modulation
Users can configure the instrument to "shift" its output frequency between three preset values
using 3FSK modulation. The rate at which the output shifts between the three frequencies (called
the "carrier frequency" and two "hop frequencies") is determined by the internal signal level of the
instrument.
5.10.1 Select 3FSK Modulation
Press
[Mod] >Type > 3FSK
softkey to enable 3FSK function.
When
Mod
is enabled,
Sweep
or
Burst
will be disabled automatically.
After 3FSK is enabled, the instrument will generate 3FSK waveform with the currently specified
carrier and modulating waveforms. To avoid multiple waveform changes, enable modulation
after configuring the other modulation parameters.
5.10.2 Carrier Waveform Shape
3FSK carrier shape: Sine (default), Square, Ramp, Pulse, Arbitrary (except DC) or Harmonic
waveform.
Press
[Wave]
button on the front panel to select the desired carrier waveform.
Noise and DC could not be used as carrier waveform.
5.10.3 Carrier Waveform Frequency
For different carrier waveforms, the settable range of carrier frequency is different. please refer to
"Frequency Characteristics" in "
".The default value is 1kHz.
User Manual 48
