GW Instek GFG-3015 User Manual page 35

INT/EXT
Press
RATE
SWP CF
Press
SYM
Press
PHASE
Press
TRIG ON
The BURST Function will perform on output terminal. Please see Figure (3).
In addition, you can use
value of Trigger signal Symmetry and set the Burst count you need.
Note: 1.
It won't make any change on execution and result by taking different step
sequence.
2. Use suitable external signal to set the BURST function you need.
Example of the Setup of GATE
The detailed calculate formula of GATE function as below:
1.Trigger Rate period = Gate period.
2.Symmetry of Trigger signal = 100% - {[(Gate period – Open Gate time)/
Gate period] ×100%}
The Gate period > Open Gate time.
Set the Trigger Type to Multi-Trigger type.
Because the Frequency and Symmetry of Trigger signal have their own
accuracy that is different than main frequency, therefore, when the above
formula is used to calculate the Open Gate time, the value might have to be
modified to close your desire. It's a normal phenomenon that the Open Gate
time may have less accuracy than your wish.
To set the following conditions for Gate function Example:
Main function: Triangle Wave.
Main Frequency: 1kHz(1mS).
Main Output Amplitude: 10Vpp.
Procedure:
The calculation of setting:
1. Trigger Rate = Gate period = 10ms(100Hz)
2. Symmetry of Trigger signal =100% - {[(10mS – 6mS)/10mS]×100%}= 60%
Press
FUNC
Press
AMPL
Then press
Press
SIGL/MUT
Press
TRIG EXT
1 0
3 0
0 DEG/%
.
◄
to select Triangle wave for main output.
1 0
FREQ 1
KHz/Vrm
to set Trigger Type to Multi-Trigger.
to select the source from internal signal.
in sequence.
0 Hz/Vpp
in sequence.
DEG/%
in sequence.
and the Rotate Knob to modify the
►
Gate period: 10mS
Open Gate Time: 6mS.
in sequence.
Hz/Vpp
in sequence.
s
GFG-3015 p.31