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Model 211B
f. Set
Oscilloscope
plug-in
SENSITIVITY
to
0.01 V/em and adjust AMPLITUDE control for 0.3 V
(3cm). The overshoot should be less than 3 mm (5%).
5-18.
Rise and Fall Times
d. Connect the Model 211B output to a 600 load.
e.
Set the Oscilloscope plug-in SENSITIVITY
to
0.5 V. Check the fall time between 10% and 90%
amplitude points. It should be less than 3.5 cm (70ns)
f. Change the Oscilloscope TRIGGER SLOPE
to
negative and move the leading edge of the pulse to the
center of the CRT.
Check rise time between 10% and
90% amplitude points. It should be less than 3.5 cm
(70ns). Remove the 6002 load.
5-19.
SYNCHRONIZATION
50 O LOAD
28
sync. 500
50a
6000
651A
Figure 5-5.
External Pulse Synchronization
Section
V
Paragraphs 5-18
to 5-22
b. Set Model 211B controls as follows:
MULTIPLIER..........--06- 1K
FREQUENCY
DIAL.......... 10
SYMMETRY..........000088
CCW
AMPLITUDE
( across 502)..5V
VERNIER......--
cece eee ceee CW
RANGE ois oc 6ce eo adie aie 8 are serereues X10K
FREQUENCY
DIAL.......... 1,1
OUTPUT
ATTENUATOR.....
3 V
AMPLITUDE
502...........
2 V pk to pk
f. Turn 651A FREQUENCY Dial slowly CCW until
a half graticule period (5cm) is obtained.
g. Turn the Model 211B SYMMETRY
control slowly
CW and observe the 180° phase shift at 50% duty cycle.
5-21.
TRIGGER OUTPUT
5-22.
This procedure
verifies
the Trigger
Output
characteristics of the Model
211B.
Refer Figure 5-6
for connection.
a. Set Model 211B controls as follows:
MULTIPLIER.............-- 1M
FREQUENCY
DIAL.......... 5
AMPLITUDE
(5v across 50%). 5
VERNIER......c.
ccc cenccas CW
TRIGGER
POLARITY........ negative
GR874 -W50
4102214
500
TEE
28
TRIG. 500
Figure 5-6.
Trigger Output Pulse Check
5-5
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