UNI-T UTG2122B, Руководство пользователя

Страница: 106 / 130

104 UTG2000B Series
(period of pulse train) will be hidden in parameter list. The range of burst period (period of pulse
train) is 1µs~500s; the default “burst period” is 1ms.To change it, you can
use multi-functional knob and direction key or press soft key Param
→
Period after selecting
type of pulse train as N cycle.
●
Burst period (period of pulse train)
≥
waveform period
×
recurring number (number of
pulse trains). The waveform period is reciprocal of waveform frequency mentioned in “select pulse
train”.
●
If burst period (period of pulse train) is too short, signal generator will automatically increase
the period to allow output of a designated number of cycles.
3.3.6 Counting of Burst
In N cycle mode, counting of pulse train is used to designate the number of waveform cycles. It is in
the range of 1~1000000 periods and 1 by default. To change it, you can use multi-functional knob
and direction or press soft function key Param
→
Cycles after selecting type of pulse train as “N
cycle”.
●
Recurring number
≤
burst period
×
waveform frequency
●
If recurring number exceeds the above limit, signal generator will automatically increase period
of pulse train to adapt to the designated counting of pulse train (without changing waveform
frequency).
3.3.7 Select Trigger Source
The signal generator generates output of pulse train upon receiving a trigger signal, and then waits
for the next trigger signal. The trigger source of pulse train can be internal, external or manual. To
change it, you can use multi-functional knob and direction key on
the interface for selecting type of pulse train or press soft key Param
→
Source .
1) In case of internal trigger, pulse train is output continuously with designated frequency. The
frequency of pulse train output is determined by period of pulse train. The signal generator can
output “N cycle” or “infinite” pulse train.
2) In case of external trigger, waveform generator will accept a hardware trigger that has been
applied to external digital modulation interface (FSK Trig connector)of back panel. The waveform
generator will output a pulse train upon receiving a TTL pulse with designated polarity. The signal
generator can output “N cycle”, “gating” or “infinite” pulse train.
3) In case of manual trigger, backlight of Trigger on front panel flashes. A pulse train is output
upon pressing Trigger. The signal generator can output “N cycle” or “infinite” pulse train.
3.3.8 Trigger Output
In case of internal or manual trigger source, the trigger signal (square wave) can be output through
sync output interface. The signal is compatible with TTL level.
Default status of trigger output: off; if you need to change press Param
→
TrigOut
→
On
●
Inner trigger: the instrument outputs a square wave with 50% duty ration from the beginning of
pulse train. The period equals to that of specified pulse train.