Trigger Level Control Range - Tektronix 2245A Operator's Manual

b. Remove the 10X BNC attenuator from the test signal path.
c. Set leveled sine-wave generator output to produce a 7.0 division dis­
play amplitude at 50 kHz.
d. Add a 10X and a 2X BNC attenuator before the 50 f l BNC termination.
(Display should stably trigger with AUTO LEVEL finding the correct
trigger level setting.)
e. Set:
A TRIGGER MODE
CH 1 Input COUPLING
TRIGGER MODE
f. CHECK—that the Trigger READY LED turns on and remains on.
g. Set:
A INTEN
CH 1 Input COUPLING
h. CHECK—that the TRIG'D LED flashes, and the READY LED turns off
after a single sweep and readout display occurs when the Input COU­
PLING switches to DC.
6.

Trigger LEVEL Control Range

a. Set:
TRIGGER MODE
TRIGGER LEVEL
A INTEN
b. Remove 10X and 2X BNC attenuators from the test signal path.
c. Reduce leveled sine-wave generator output level until a stably triggered
display is just obtainable.
d. Set TRIGGER LEVEL fully CW.
e. Set leveled sine-wave generator output for a stable display (if neces­
sary) .
f. Set CH 1 VOLTS/DIV to 1 V.
2245A Operators
Performance Check Procedure
NORM
GND
SGL SEQ
3/4 fully CW
DC (see CHECK below)
AUTO (not AUTO LEVEL)
Fully CCW
For a good viewing intensity
7-33