3.15 Output port
There are three output ports on the front panel of the instrument, users must not input signal to
the output port as a possibility of damaging the instrument.
5.15.1. Signal output port
《
《
《
《
CHA
》
》
》
》
The signals of CHA are all output from this output port, press
【
Output
】
key to open or close the
signal from the output port circularly. The output port is open when the “Output” light is on, and
close when the “Output” is off. If wrongly connect external high voltage to signal output port,
instrument will suffer “inverse filling” danger, and then instrument will turn on the protection
function, close immediately signal output port and make an alarm with the “Output” light off. In
this case, you must check external load, only after eliminating the failure can press
【
output
】
key
to open signal output port.
5.15.2. Signal output port
《
《
《
《
CHB
》
》
》
》
The signals of CHB are all output from this output port, the characteristics of which is the same as
the one of
《
CHA
》
.
5.15.3. Sync output port
《
《
《
《
Sync
》
》
》
》
Output pulse wave compatible with TTL, high level
＞
4V, low level
＜
0.3V. Sync signal is different
under different function.
1. When CHA is under continuous function, sync signal is a square signal with TTL level, the
frequency of sync signal is the same as the frequency of the signal from
《
CHA
》
port, when the
output mode is set to be 0, the phase of sync signal is the same as the phase of the signal
from the
《
CHA
》
port. When the output mode is set to be 1, the phase of sync signal is the
opposite of the phase of the signal from the
《
CHA
》
port.
2. When CHB is under continuous function, sync signal is a square signal with TTL level, the
frequency of sync signal is the same as the frequency of the signal from
《
CHB
》
port, when the
output mode is set to be 0, the phase of sync signal is the same as the phase of the signal
from the
《
CHB
》
port. When the output mode is set to be 1, the phase of sync signal is the
opposite of the phase of the signal from the
《
CHB
》
port.
3. Under FM, AM, PM, PWM, sync signal is a square with 50% duty cycle, the frequency of which
is equal to the modulation wave, and the phase is referenced to the modulation wave.
4. Under FSK, sync signal is a square with 50% duty cycle, the frequency of which is equal to the
hop rate, when outputting carrier frequency, sync signal is with low level. When outputting hop
frequency, sync signal is with high level.
5. Under frequency sweep function, the sync signal is a pulse signal with TTL level, the rising
edge of the pulse wave match along with the start point of the sweep, and the falling edge of
the pulse wave match along with the middle point of sweep range, the period of pulse wave is
the same as sweep time.
6. Under burst output, sync is a pulse wave, the rising edge of which corresponds to the start
point of the burst, and the falling edge corresponds to the end point, and the period is equal to
the repeated period of the burst.
7. Under frequency sweeping, burst and FSK functions, if external trigger or manual trigger is
selected, the frequency of the sync signal was determined by the trigger signal.
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