Tonghui TH2829 Series - Trigger Mode; Auto Level Control Function

TH2829X Series Operation Manual Chapter 3 Introduction to [MEAS]
29
 Test function (FUNCB)
 Test frequency (FREQ)
 Test level (LEVEL)
 Test range (RANGE)
 Test speed (SPEED)
 DC Bias (DC BIAS)
 DC Voltage Source (DC SRC)
3.6.1 Trigger mode
There are 4 trigger modes on TH2829X: INT, MAN, EXT and BUS.
When the trigger mode is set as INT, TH2829X will make sequential and repeated
tests.
When the trigger mode is set as MAN, press [TRIGGER] once, TH2829X will make
one test.
When the trigger mode is set as EXT, once the HANDLER interface receives a
positive impulse, TH2829X will execute one measurement.
When the trigger mode is set as BUS, once the IEEE 488 interface receives a
TRIGGER command, TH2829X will execute a test.
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Note: In the process of testing, when TH2829X receives a trigger signal, it will be
ignored. So the trigger signal should be sent after the test is done.
When optional HANDLER interface triggers TH2829X, the trigger mode is set
as EXT.
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Operation steps for the trigger mode setup
Perform the following operations to set the trigger mode.
1) Move the cursor to the TRIGGER zone, the following soft keys will be
displayed:
 INT
 MAN
 EXT
 BUS
2) Use above soft keys to set the trigger mode.
3.6.2 Auto level control function
Auto level control function can adjust the real test level (voltage across or current
through DUT) to the test level value. This function can guarantee the test voltage
or current being constant.
When using this function, the test level can be set within the range below:
The range of constant voltage: 10 mV
rms
to 1 V
rms
The range of constant current: 100 µA
rms
to 10 mA
rms