25 Mhz Trigger Sensitivity; Mhz Trigger Sensitivity - Tektronix 2245A Operator's Manual

Performance Check Procedure
c. Set leveled sine-wave generator output to produce a 7.0 division sine-
wave display amplitude at 500 kHz.
d. Add a 10X and a 2X BNC attenuator before the 50 f l BNC termination
(for a 0.35 division display amplitude).
e. CHECK—that the display cannot be triggered In either HF REJ of
NOISE REJ CPLG.
f. Set:
Horizontal MODE
A/B SELECT
B SEC/DIV
g. CHECK—that the display cannot be triggered in HF REJ or NOISE REJ
CPLG by adjusting the Trigger LEVEL control.
3.

25 MHz Trigger Sensitivity

a. Set:
Horizontal MODE
A/B SELECT
TRIGGER CPLG
A SEC/DIV
b. Remove the 10X and 2X BNC attenuators from the signal path.
c. Set leveled sine-wave generator output to produce a 7.0 division dis­
play amplitude at 25 MHz.
d. Add a 10X and a 2X BNC attenuator before the 50 f l BNC termination.
e. CHECK—that the display Is stably triggered In DC, LF REJ, and AC
Trigger CPLG; the display is not triggered in NOISE REJ and HF REJ
Trigger CPLG settings.
f. Set:
TRIGGER CPLG
Horizontal MODE
A/B SELECT
B SEC/DIV
7-30
B
B Trigger
1 |1S
A
A Trigger
DC
50 ns
DC
B
B Trigger
20 ns
2245A Operators