Tenma 72-2650 Operating Manual page 35

72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
of the trigger threshold on the input signal edge.
Pulse Width trigger: trigger produces when the pulse
width of the trigger signal satisfies some set trigger >, <
or = condition.
Video Trigger: conduct field or line trigger for standard
video signal. The triggering can be enabled by pressing
the [F1] button at the [TRIG MENU] for the 72-10510/
72-8225A/72-8705A/72-8710A DSO, by pressing [F1]
button at the [MENU] for the 72-2650 DSO;
Alternating trigger: applicable to trigger signals without
frequency correlation.
All kinds of trigger menus shall be respectively
described as follows.
The user can enable the alternating trigger by pressing [F2]
button at the [TRIG MENU] for the 72-10510 / 72-8225A/
72-8705A/72-8710A DSO, or by pressing [F2] button at
the [MENU] for the 72-2650 DSO.
Edge trigger
Edge trigger mode refers to the triggering of trigger
threshold on the input signal edge. When selecting "edge
trigger", trigger on the rising edge or falling edge of input
signal shall be completed.
Table 2-7
Function Menu Settings
Type Edge
CH1
CH2
EXT
Source (F2)
EXT/5
AC Line
Alter
Description
Set CH1 as the triggering
signal source
Set CH2 as the triggering
signal source
Set external trigger input
channel as the triggering
signal source
Set external trigger source
(divided by 5) as trigger level
range (Only for 72-2650)
Set AC power line as
trigger source
Set to Alternative trigger
between CH1 and CH2 as
signal source
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