User Manual

Carrier Wave Frequency Setting
See Carrier Wave Frequency Setting
Modulation Source Selection
The device can select internal modulation source or external modulation source. After
enabling ASK function, the default of modulation source is internal. If need to change,
press Param → Source → External in turn.
1)Internal Source
When modulation source is internal, internal modulation wave is a square wave of 50%
duty ratio (not adjustable). The ASK rate can be set to customize modulated waveform
amplitude hopping frequency.
2) External Source
When modulation source is external, carrier waveform will be modulated by an external
waveform. ASK output amplitude is determined by the logic level of modulation interface
(FSK Trig connector). For example, output the carrier wave amplitude of current setting
when external input logic is low, and output currently set carrier wave amplitude, when input
logic is high, output amplitude is less than currently set carrier wave amplitude.
ASK Rate Setting
When modulation source is internal, frequency of ASK amplitude jump can be modulated.
After enabling ASK function, ASK rate can be set and the settable range is 2mHz to 1MHz,
the default rate is 100Hz. If need to change, press Param → Rate in turn.
Comprehensive Example
Make the instrument work in amplitude shift keying (ASK) mode, then set a logic signal
with 300Hz from the internal of the instrument as a modulation signal and a sine wave with
frequency of 15kHz and amplitude of 2Vpp as a carrier wave signal. Specific steps are seen
as following:
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