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5.11.3 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.
5.11.4 Modulation Source
4FSK uses internal modulation source. The modulating waveform is square.
5.11.5 4FSK Rate
When internal modulation source is selected, press [Mod] > Rate softkey to set the rate at which
the output frequency shifts between "carrier frequency" and three "hopping frequencies".
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.
5.11.6 HoppingFrequency
The range of hopping frequency depends on the carrier waveform currently selected. Refer to
"Frequency Characteristics" in "
Specifications".
Press [Mod] > Hopping softkey. Use the numeric keypad or direction keys and knob to input the
desired frequency value.
5.12 OSK Modulation
When OSK (Oscillation Shift Keying) modulation is selected, users can configure the generator to
output a sine signal with intermittent oscillation as shown in the figure below (the carrier waveform
is 100Hz and the OSK rate is 1kHz). The start-oscillation and stop-oscillation of the internal crystal
oscillator are controlled by the internal signal level or signal level from the
[FSK/Trig/Sync/Extmod] connector on the rear panel. When the internal crystal oscillator starts
to oscillate, the instrument starts to output the carrier waveform and when the internal crystal
stops oscillating, the output stops.
User Manual 50
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