HP 8568B m, CHANNEL, Note, Input, Amplifier to, Pulse Response of, CHAN, time, down, BLANK, Press, V/div, DISPLAY), Press C-1:, 50.0ns/div, . 125.000 ns, Press (SHOW)

3.Preliminary Display Adjustments (SN 3004A and Above)

19.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.

20.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.

Pulse Response of 21. Disconnect the oscilloscope channel 4 probe from the spectrum

Control Gate Z		analyzer. Connect the oscilloscope channel 1 probe to
Amplifier to		AlA2TP301, and connect	the probe’s ground lead to AlA2TP501.
	BLANK
	Input 22. On the oscilloscope, press		[RECALL) [CLEAR] to perform a soft reset.

23.Press m, CHANNEL 1 on, more preset probe , and use the front-panel knob to set the probe to lO.OO:l. Press more .

24.Set the oscilloscope controls as follows:

Press [CHAN]:
amplitude scale . . . . . . . . . . . . .		. . . . . . . . . . . . . . .	.20.0	V/div
offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			. . . . .	. ...45.0000 V
Press C-1:
time				50.0ns/div
	scale . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . .	. . . . ..
delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			. . . .	. 125.000 ns
Press (TRIG):
level . . . . . . . . . . . . . . . . . . . . . . ..		__......................		50.00000 v
Press [DISPLAY):
connect dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			. . . . . .	. . . . . . ..on
Press (SHOW).

25.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.

Note 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