TB 9-4931-505-24
13. Amplifier Bandwidth
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1to TI +INPUT.
(2) Set VOLTS/DIV switch to 0.1 V, -INPUT to GND, and +INPUT to AC.
(3) Adjust time base unit for a 2 ms sweep.
(4) Adjust oscilloscope calibrator level sine output frequency for 100 kHz and
amplitude for an 8 division vertical deflection on oscilloscope.
(5) Slowly increase oscilloscope calibrator frequency until oscilloscope display
reaches its upper -3dB limit of 5.66 divisions. Oscilloscope calibrator will indicate
frequency of 2 MHz or greater.
(6) Press BANDWIDTH LIMIT 10 kHz pushbutton and adjust oscilloscope
calibrator frequency for 1 kHz and amplitude for an 8 division oscilloscope display.
(7) Increase oscilloscope calibrator frequency until oscilloscope displays 5.66
divisions (upper -3dB limit). Test oscillator will indicate frequency between 8 and 12 kHz.
(8) Release BANDWIDTH LIMIT 10 kHz pushbutton.
b. Adjustments. No adjustments can be made.
14. Input Gate Current
a. Performance Check
(1) Set VOLTS/DIV switch to 1 mV and press both +INPUT and -INPUT coupling
pushbuttons to GND and release both AC pushbuttons to DC.
(2) Adjust time base unit for a 1 ms sweep.
(3) Align trace on oscilloscope graticule centerline, using STEP ATTEN BAL control.
(4) Release +INPUT coupling GND pushbutton. Trace will remain centered on
oscilloscope graticule 0 division.
(5) Release -INPUT coupling GND pushbutton.
Trace will remain centered on
oscilloscope within 0.1 division.
b. Adjustments. No adjustments can be made.
15. Comparison Voltage
a. Performance Check
(1) Connect multimeter to TI Vc OUT and chassis ground.
(2) Set COMPARISON VOLTAGE (Vc) (outer) dial to 10.00 and press 0-10 V
pushbutton. If multimeter does not indicate between 9.975 and 10.025 V dc, perform b (1) below.
(3) Release COMPARISON VOLTAGE (Vc) 0-10 pushbutton to OUT 0-1 V. If
multimeter does not indicate between 0.998 and 1.003 Vdc, perform b (2) below.