TB 9-6625-2294-35
9. Triggering
a. Performance Check
(1) Press TI pushbuttons for indications as listed in (a) through (f) below:
(a)
VERTICAL MODE CH 1 on.
(b)
VERT MODE CH 2, CH 3, and CH 4 off.
(c)
TRIGGER SOURCE to VERT CH 1.
(d)
TRIGGER MODE to NORM.
CH 1 and CH 2 input coupling to 1 MΩ DC.
(e)
Set TI ∆V to indicate ∆V (cursors off).
(f)
(2) Position controls as listed in (a) and (b) below:
(a) CH 1 and CH 2 VOLTS/DIV VAR controls cw to detent.
(b) TRIGGER LEVEL control to midrange.
(3) Perform steps (a) through (c) below:
(a) Set oscilloscope calibrator VOLTAGE output as listed in first row of table
(b) Set oscilloscope calibrator frequency at 1 kHz.
(c) TI CH 1 VOLTS/DIV switch as listed in first row of table 10.
(4) Alternately adjust TRIGGER LEVEL control for most positive or most negative
voltage that produces a barely triggered display when selecting + and - SLOPE. If
TRIGGER LEVEL readout indication is not within limits given in + peak column or -
peak column of table 10, perform b below.
Test
Test instrument trigger level
instrument
calibrator
readout indications
VOLTS/DIV
VOLTAGE
+ peak
-peak
switch settings
output settings
Min
Max
Min
Max
5
mV
20
mV
16.8
mV
23.2
mV
-2.6
mV
2.6
mV
10
mV
50
mV
44
mV
56
mV
-4.5
mV
4.5
mV
20
mV
0.1
V
89
mV
111
mV
-8.0
mV
8.0
mV
50
mV
0.2
V
178
mV
222
mV
-16
mV
16
mV
100
mV
0.5
V
450
mV
550
mV
-35
mV
35
mV
200
mV
1.0
V
0.90 V
1.10 V
-70
mV
70
mV
500
mV
2.0
V
1.78 V
2.22 V
-.16 V
.16 V
1.0
V
5.0
V
4.50 V
5.50 V
-.35 V
.35 V
2.0
V
10.0
V
9.0
V
11.0
V
-0.7
V
0.7
V
5.0
V
20.0
V
17.8
V
22.2
V
-1.6
V
1.6
V
(5) Repeat technique of (3) and (4) above for each remaining row listed in table 10.
(6) Perform steps (a) through (c) below:
