Attenuator and Input Capacitance

TB 11-6625-2713-50

(2) Rotate CH1 POSITION control fully counterclockwise and then fully clockwise.

If negative and positive portion of display is not equal distance above and below horizontal

graticule centerline, perform b below.

b. Adjustments. Adjust A1A5R3 (fig. 3) until display is equal distance above and

below horizontal graticule centerline.

Figure 3. Vertical amplifier adjustments (subassembly 7963).

12. Attenuator and Input Capacitance

a. Performance Check

(1) Connect square-wave generator (A5) OUTPUT to TI CH1 INPUT, using cable

and termination supplied with square-wave generator, standardizer, and adapters (B6, B1,

and B2).

(2) Set TI CHI VOLTS/DIV switch to .005.

(3) Adjust square-wave generator frequency for 1 kHz (kilohertz) and amplitude for

4 divisions of vertical display on crt.

(4) Adjust time base for convenient display on crt.

(5) Adjust standardizer for optimum squarewave display.

(6) Repeat technique of (2) and (3) above for TI VOLTS/DIV switch settings listed in

table 5. If crt does not display square-wave with square corners and flat top, perform

appropriate adjustments listed.