FeelElec FY6800 Series User Manual page 27

Modulation source
Under the modulation function, click the "SOUR" button to switch the modulation
source, that is, select the modulation signal.
There are four types of sources in FSK, ASK, PSK, and trigger modes:
① CH2: Use the signal of channel 2 as a modulation signal.
② External (AC): External signals are AC-coupled through the EXT.IN port.
③ Manual: Use the manual "OK" button as the modulation signal.
④ External (DC): External signal input via TTL_IO port in DC-coupled form.
There are two sources in the AM, FM, and PM modes:
① CH2: Use the signal of channel 2 as a modulation signal.
② External (Ext.IN): External signals are connected in DC-coupled form via the EXT.IN
port.
Each time the "Source" button is pressed, the function will switch down once.
Modulation parameters
Under the modulation function, click the "Parameters" button to adjust the modulation
parameters.
E.g:
① In the "FSK" mode, the frequency of frequency hopping can be adjusted.
② In the "trigger" mode, the number of output pulse trains can be adjusted.
③ In the "AM" mode, you can adjust the modulation rate of the amplitude modulation (0
to 200%).
④ In FM mode, frequency offset parameters can be adjusted.
⑤ In the "PM" mode, the degree of phase deviation can be adjusted.
Other key functions
Click "FREQ" button under the modulation function to adjust the frequency of CH1.
Click the "AMPL" button under the modulation function to adjust the amplitude of CH1.
FY6800 Series User's Manual
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