described in the previous section of this chapter. The parameters carry over from the parameter
settings of the main waveforms sine and square. Press the 【menu】 key repeatedly to cycle through
the burst menu parameters listed below.
TRIG: Trigger source
COUNT: Number of cycles
SPACE T: Burst time spacing
PHASE: The starting phase of the burst
Select trigger source “TRIG”
Three trigger sources are available. Internal trigger and 2 types of external triggers sources, external
gated and single. The corresponding menu parameters are 1: INT, 2: EXT and 3: SINGLE. The
default is internal triggering.
a) Internal trigger
When the internal trigger source is selected, the frequency at which the burst is generated depends
on parameter SPACE_T, burst count and the burst carrier frequency.
b) Single trigger mode
Generate a single trigger event by pushing the 【output】key once or by applying a single TTL pulse
at the “Ext.Trig” input terminal in the rear panel. A single burst with predefined parameters will be
generated.
c) External gated burst mode
The TTL signal applied to “Ext. Trig” input terminal in the rear panel will enable or disable the
output of the generator. When the TTL level of the gate signal is high, the generated will generate
burst pulses according to the parameters of the set carrier frequency. Burst parameters COUNT and
SPACE_T are ignored in this mode. Anunciators “Trig” and “Ext” turn on when this mode is active.
Burst count “COUNT”:
Definition: The number of cycles to be output per burst.
Range: 1 ~10000 cycles in 1 cycle increments. Additionally, the minimum number of cycles must
also satisfy F
C
/50khz +1。Parameter does not apply when “TRIG” is set to “EXTernal”.
Burst spacing time “SPACE T”:
Definition: Time interval between the 2 consecutive groups of bursts (time interval during which
there is no burst signal present) Parameter does not apply when “TRIG” is set to “EXTernal” or
“SINGle”.
Range: 0.1ms ~ 800s.
Starting phase of the burst “PHASE”
Burst phase: 0.0º ~ 360.0º in 0.1º increments
To Next Page
Loading...
Need help?
General
