Tektronix 7B51 Instruction Manual page 65

Performance Check/Calibration - Type 7851
LEVE L/S LOPE
TRIGGERI NG
MODE
COUPLIN G
SOURCE
MAGN IFIER
B DE LAY MODE
Type 7851
0/+
AUTO
AC
INT
X,
B STARTS AFT ER
DELAY
TI ME/D IV 1 ms
DELAY TI ME MULTIPLIER 1.00
Level Slope
Triggering
Mod,
Coupling
Source
Magnifier
8 Delay Mode
Time/D iv
Test Time 8ase
0/+
Norm
AC
Int
X,
Independent
10 \1s
19. Check/Adjust Delay Start IR590) and Delay
Stop IR500)
a. With the Type 7B51 DELAY TI ME MULTIPLIER
fully counterclockwise, check that 0.00 is aligned with the
index.
b. Set the time-mark generator for 1 ms markers. Adjust
the Type 7B51 LEVE L/S LOPE for a display triggered on
the positive slope of the marker. Set the Type 7B51
DELAY TI ME MU LTIPLIER to 1.00.
c.
CHECK- The intensified portion of the sweep starts
at the second marker (see Fig . 5·8).
d. ADJUST - Delay Start (R590) so the intensified
portion of the sweep starts at the second marker.
e. Reset the Type 7B51 DELAY TIME MULTIPLIER
to 9.00.
f .
CHECK-The intensified portion of the sweep starts
at the tenth marker (see Fig. 5·9).
g. ADJUST - Delay Stop (R500) so the intensified
portion of the sweep starts at the tenth marker.
5·12
,
Fii.5·8. Typical CAT display showing correct setting of d elay sta rt .
h. Change the Type 7504 Horizontal Mode to Alt and
the Type 7B5 1 DELAY TI ME MU LTIPLIER to 1.00.
i. CHECK- The second marker begins at the start of the
delayed (B) sweep
(see
Fig. 5·10).
j .
ADJUST -Delay start (R590) so the second marker
begins at the start of the delayed sweep.
k.
Reset the DELAY TIME MULTIPLIER to 9.00.
I. CHECK- The tenth marker begins at the start of the
delayed (B) sweep.
Fig. 5 ·9 . Typical CAT display showing correct setting of delay stop .
....,