Datasheet

5.7.3 Modulating Waveform Frequency

Press 〖Sum Freq〗softkey then set the desired value using knob or keypad. Different

from other modulating mode, the modulating frequency can be highly greater than carrier

frequency.

5.7.4 Modulating Waveform Shape

Press 〖Shape〗softkey then select ‘Shape’ to enter the desired wave. Press Waveform

Menu key, then select one of most waveforms from above table as modulating waveform,

but some waveforms is not available. Finally, return to modulating menu.

5.7.5 Modulating Source

The waveform generator will accept an internal or external modulation source for Sum.

Press 〖Source Int/Ext〗softkey. It’s available to set modulating frequency and modulating

waveform if ‘Internal’ source is selected. But if you select External source, the carrier

waveform is modulated with an external waveform. The sum amplitude is same as actual

value if amplitude 5Vpp, dc offset 0Vdc signal level present on the rear-panel <Mod In>

connector.

5.8 Frequency -Shift Keying Modulation (FSK)

In FSK mode, output signal hop between Carrier Frequency and Hop Frequency, the

hopping rate decided by FSK rate.

Press 【Modulate】 key then select the FSK mode. The FSK modulating waveform

sketch and FSK menu will be both displayed. The selection of FSK mode includes FSK,

QFSK, and 4FSK.

5.8.1 Set Carrier

Firstly, set the shape, frequency, amplitude and offset of Carrier Waveform. You can

select most waveforms from above table to be carrier, but some waveforms are not

available.

5.8.2 Hop Frequency

FSK modulation is similar to FM that modulating waveform is Square. And hop frequency

is similar to frequency deviation. But the difference is that, frequency deviation is the

frequency of carrier wave plus or minus deviation value, whose setting range is relational

with the frequency of carrier wave, while hop frequency has no relationship with it. Press

〖Hop Freq〗softkey to set the desired value of hop frequency.