Datasheet

5.14 External Trigger Source

Generator has two bidirectional trigger ports on the rear panel <Trig In/Out>. When you

select external source, the trigger port is set as input from external trigger signal. When

you select internal source, the trigger port is set as output from internal trigger signal.

CHA is only for channel A and CHB is for channel B.

5.14.1 Trigger Level Input

When generator is under the function of FSK, 4FSK, QFSK, PSK,4PSK, QPSK, ASK,

OSK, user can input external trigger signal, which is digital logic level.

⑴ Press 〖Polarity〗softkey. If select “Positive”, the logic high level of trigger signal will

be set as “1”, the logic low level as “0”. If select “Negative”, the logic high level of

trigger signal will be set as “0” and logic low level as “1”.

⑵ If generator is under burst output function and burst mode selected as “ Gated”,

when trigger signal is “1”, the burst signal starts output. When trigger signal is “0”, it

will wait for the last periodic waveform and stops output. There will be at least two

cycles for gated output, the cycle of which should meet with the following

relationship:

Trigger Cycle> 2/Frequency of burst signal

⑶ If generator under FSK, PSK, ASK, OSK function, external signal will be input from

the trigger port. When trigger signal is “0”, it will output carrier frequency, carrier

phase and carrier amplitude, when trigger signal is “1”, it will output hop frequency,

hop phase and hop amplitude.

⑷ If generator under 4FSK, QFSK, 4PSK, QPSK, user need to input two digits of

trigger signal. The trigger port of original channel is inputted by low digit and the

other channel port by high digit.

When trigger signal is “00”, it outputs carrier frequency and carrier phase.

When trigger signal is “01”, it outputs hop frequency 1 and hop phase 1.

When trigger signal is “10”, it outputs hop frequency 2 and hop phase 2.

When trigger signal is “11”, it outputs hop frequency 3 and hop phase 3.

5.14.2 Trigger Edge Input

When generator under function of burst output or frequency sweep, user can input

external trigger signal, which is edge hoping.