TB 9-6695-261-35
(5) Press FREQUENCY Hz pushbutton to indicate 1-0-0 and press MULTIPLIER
10 pushbutton.
(6) Adjust RMS VOLTS vernier control for a 9 V indication on true rms voltmeter.
(7) Press MULTIPLIER 1000 pushbutton.
(8) Adjust P243 until rms voltmeter indicates 9.00 V (R).
12. Square Wave
a. Performance Check
(1) Connect OUTPUT (may be located on front panel of some models), to
oscilloscope using 50 Ω termination.
(2) Position controls as listed in (a) through (c) below:
(a) SQUARE WAVE P-P VOLTS control fully cw.
(b) FREQUENCY Hz pushbuttons to indicate 1-0-0.
(c) MULTIPLIER 10 pushbutton pressed.
(3) Adjust oscilloscope time base, triggering, and horizontal position controls for two
complete square waves. If symmetry is not within 2 percent, perform b (1) below.
(4) Press FREQUENCY Hz pushbuttons to indicate 9-9-9 and press
MULTIPLIER 1000 pushbutton. Risetime and falltime will be less than 20 ns and
overshoot less than 5 percent.
(5) Connect
OUTPUT to multimeter.
(6) Set FREQUENCY Hz pushbuttons to indicate 1-0-0 and press MULTIPLIER
10 pushbutton.
(7) If multimeter does not indicate 0 10 mV dc, perform b (2) below.
b. Adjustments
(1) Adjust P281 (fig. 1) for a symmetrical waveform (R).
(2) Adjust P282 (fig. 1) for optimum 0 dc level (R).
13. Power Supply
a. Performance Check
NOTE
Do not perform power supply check if all other parameters are within
tolerance.
(1) Position controls as listed in (a) through (c) below:
(a) FLOATING/CHASSIS grounding switch to CHASSIS.
(b) FREQUENCY Hz pushbuttons to indicate 1-0-0.
(c) Press MULTIPLIER 10 pushbutton.
(2) Connect multimeter between +22 V test point and ground (fig. 1). If multimeter
does not indicate between 21 and 23 V dc, perform b (1) below.