TFG2900A Series Function/Arbitrary Waveform Generator Users’ Guide
Suin Instruments Co., Ltd
41
3.10.5 ASK Rate
: Press
〖
ASK Rate
〗
or
〖
OSK Rate
〗
soft key to set the value, ASK rate or OSK
rate is usually lower than carrier frequency.
3.10.6 Trigger Source:
Press
〖
Source
〗
to choose trigger source. If ‘Internal’ is chosen, instrument
will use internal trigger source, ASK rate setting is effective. If ‘External’ is chosen, instrument
will use external trigger source, ASK rate setting will be ignored. Input external trigger signal
from rear panel’s
《
Trig In/Out
》
port.
3.10.7 Trigger polarity
: Press
〖
Polarity
〗
, you can choose external trigger signal’s polarity. It is
only effective for external trigger.
When it is positive:
When trigger signal is 0, instrument will output carrier amplitude.
When trigger signal is 1, instrument will output hop amplitude.
When it is negative:
When trigger signal is 1, instrument will output carrier amplitude.
When trigger signal is 0, instrument will output hop amplitude.
3.10.8 Sync output
: Sync signal’s duty cycle is 50%, and sync signal’s frequency is equal to ASK
rate. When carrier amplitude is output, sync signal will be low level. When hop amplitude is
output, sync signal will be high level.
If external trigger is used, sync signal will be decided by external trigger signal.
3.11 Burst Output
3.11.1 Function Selection
: Press
【
Burst
】
key to enter the burst function. The burst waveform’s
diagram and burst menu will be both displayed.
3.11.2 Burst Signal
: We usually use sine wave as burst signal. Of course other built-in waveforms
can also be used, but some are not suitable. Press
【
CH1
】
to enter burst signal setting interface to set
burst signal’s parameter. Press
【
Burst
】
again to enter burst parameter setting interface to set its
parameter.
3.11.3 Burst mode
: Press
〖
Type
〗
to choose burst mode. If you choose ‘Trigger’, burst signal will
output setting numbers of cycle from the start phase and then stop at the level corresponding to
start phase for each trigger and then wait for the next trigger. Trigger signal’s period should