Loading ...
Loading ...
Loading ...
5.5.6 Modulation Amplitude
After enabling ASK modulation function, press [Mod]>Amplitudesoftkey to set the modulation
amplitude.
Use the numeric keypad or direction keys and knob to input the desired amplitude value.
The range of amplitude (HighZ) is from 2mV to 20V and the default is 100mV.
5.6 FSK Modulation
Users can configure the instrument to "shift" its output frequency between two preset values using
FSK modulation.The rate at which the output shifts between the two frequencies (called the
"carrier frequency" and the "hop frequency") is determined by the internal signal level of the
instrument or the signal level on the [FSK/Trig/Sync/Extmod] connector on the rear panel.
5.6.1 Select FSK Modulation
Press [Mod] >Type > FSKsoftkey to enable FSK function.
When Mod is enabled, Sweep or Burst will be disabled automatically.
After FSK is enabled, the instrument will generate FSK waveform with the currently specified
carrier and modulating waveforms. To avoid multiple waveform changes, enable modulation
after configuring the other modulation parameters.
5.6.2 Carrier Waveform Shape
FSK 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.
5.6.3 Carrier Waveform Frequency
For different carrier waveforms, the settable range of carrier frequency is different. please refer to
"Frequency Characteristics" in "
Specifications".The default value is 1kHz.
Press [Setting] > Frequency softkey on the front panel, and then use the numeric keypad or
direction keys and knob to input the desired frequency value.
5.6.4 Modulation Source
Press [Mod] > SignalSourcesoftkey to select Internal (default) or External as the modulation
source.
User Manual 43
Loading ...
Loading ...
Loading ...