Triggering; T R Ig G E R In G; Hz Trigger Sensitivity - Tektronix 2245A Operator's Manual

Performance Check Procedure
Equipm ent Required (See Table 7-1)
Leveled sine-wave generator
50 11 BNC coaxial cable
2X BNC attenuator
Dual-input coupler
1. 500 Hz Trigger S e n sitivity
a. Set:
READOUT (Intensity)
A INTEN
VERTICAL MODE
CH 1 and CH 2 Input COUPLING
CH 1 VOLTS/DIV
SCOPE BW
Horizontal MODE
A SEC/DIV
Horizontal POSITION
A/B SELECT
TRIGGER MODE
TRIGGER SOURCE
TRIGGER CPLG
TRIGGER SLOPE
TRIGGER HOLDOFF
FOCUS
CLEAR MEAS'MT
b. Connect function generator (FG 502) output to the CH 1 input via a
50 f l BNC coaxial cable and a 50
c. Set function generator (FG 502) output to produce a 7.0 division sine-
wave display at 500 Hz.
d. Add a 10X and a 2X BNC attenuator before the 50
(for a 0.35 division display).
7-28

TRIGGERING

For a viewable readout
For a viewable trace
CH 1
DC
0.1 V
On
A
1 ms
12 o'clock
A Trigger
AUTO LEVEL
VERT
AC
Min
For best defined display
Press to remove measurement
cursors.
Cl
BNC termination.
Function generator
10X BNC attenuator
Cl
50 BNC termination
TV signal generator
(positive-going)
Cl
BNC termination
2245A Operators