Tonghui TH2883-5 - Trig Mode; Delay Time

TH2883 Series Operation Manual Chapter 5 Introduction to [SETUP]
5-4
waveforms.
 ONLY STD WAVE In the phase of measurement, only the standard waveform will be
displayed on the screen, so the measurement will be taken at the
fastest speed. This way is suitable for users only needing the
comparison result.
 ONLY TEST WAVE In this mode, only the test waveform is displayed thus it will take some
time to refresh the tested waveforms after each test and the test
speed will be decreased.
 ALL OFF With the exception of comparison result, none waveforms will be displayed,
therefore the test speed is the fastest in this mode.
 Lighten this key to enable the numerical arrow key. Respectively press 8, 2, 4, 6, the
cursor will move up, down, left and right.
 Note: In the latter two modes, when SEQ CYCLE or SINGLE CYCLE is selected, the
standard waveform will disappear; when SINGLE SAMPLE is selected, none waveforms
will be displayed. Thus it is highly recommended for user to turn on standard waveform.
5.2.7 Trig Mode
The instrument will perform a measurement only at the receipt of a trigger signal. TH2883
provides four kinds of trigger mode: MAN (manual including foot control), EXT (external), INT
(internal) and BUS. Trigger signals only in the current trigger mode can be received and will be
valid only on the MEAS DISP page. Move the cursor to this zone, following soft keys will be
displayed.
 MAN This is the default trigger mode. Pressing START or using the foot
switch to start a measurement.
 EXT Via HANDLER interface，input a negative TTL pulse (more than 1µs)
from external to the instrument, the rising edge of which will form a
trigger impulse.
 INT When the trigger mode is set to this mode, TH2883 starts a
measurement once START is pressed on the MEAS DISP page, and
then the instrument will continuously repeat measurements until
MEAS EXIT soft key is pressed.
 BUS TRIGGER commands are sent to TH2883 via RS232SC, USBTMC,
USBCDC or LAN interface.
 Lighten this key to enable the numerical arrow key. Respectively press 8, 2, 4, 6, the
cursor will move up, down, left and right.
5.2.8 Delay Time
Delay time refers to the time between the end of a measurement and the start of the next
measurement. The delay function is only available when trigger mode is set to INT trigger mode.