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19.
20.
Pulse Response of 21.
Control Gate Z
Amplifier to BLANK
Input 22.
23.
24.
Set the oscilloscope controls as follows:
Note
25.
3. Preliminary Display Adjustments (SN 3004A and Above)
Connect the oscilloscope’s channel 1 probe to AlA2TP104 and the
channel 4 probe to AlA2TP105. See Figure 3-25 for the location
of the test points. Connect the output of the pulse/function
generator to
52
(Y input) on the Display Adjustment PC board in
the
A3A2
slot.
The Y Deflection Amplifier is identical to the X Deflection
Amplifier. Repeat steps 12 through 18 for the Y Deflection
Amplifier using
R127,
R120,
R117,
C104,
and
C109,
respectively.
Disconnect the oscilloscope channel 4 probe from the spectrum
analyzer. Connect the oscilloscope channel 1 probe to
AlA2TP301, and connect the probe’s ground lead to AlA2TP501.
On the oscilloscope, press
[RECALL)
[CLEAR]
to perform a soft reset.
Press
m,
CHANNEL 1
on,
more preset probe , and use the
front-panel knob to set the probe to
lO.OO:l.
Press more .
Press
[CHAN]:
amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20.0 V/div
offset
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...45.0000 V
Press
C-1:
time scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..50.0ns/div
delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125.000 ns
Press (TRIG):
level . . . . . . . . . . . . . . . . . . . . . .
..__......................
50.00000 v
Press
[DISPLAY):
connect dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..on
Press (SHOW).
Connect the output of the Pulse/Function Generator to
53
(Z
input) on the Display Adjustment PC Board in the
A3A2
slot. Set
the board’s switch to the down position.
The pulse/function generator’s output must be terminated with 50
ohms. Use a BNC tee, a 500 termination, and a BNC female to SMB
female adapter. Install the 500 termination as close to the Display
Adjustment PC Board as possible.
26. Set the Pulse/Function Generator’s controls as follows:
MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NORM
Waveform
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..pulse
Frequency (FRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 kHz
Width (WID). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 ns
Amplitude (AMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.4.OOV
Offset (OFS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.2.OOV
27. Disconnect the black connector with three wires (8, 98, and 96)
from
AlA2J5,
and set AlA2R319 INT GAIN fully clockwise.
28. Set the spectrum analyzer’s front-panel INTENSITY control fully
clockwise. Adjust the oscilloscope trigger level for a stable display.
Note the display on the oscilloscope. The pulse should be
>55V
peak-to-peak.
Adjustments
3.57