TB 9-6625-2132-24
Table 5. +INPUT and INPUT Attenuator Compensation - Continued
Test instrument
Adjustments (fig. 1)
VOLTS/DIV
+INPUT
-INPUT
switch settings
Square corner
Flat top
Square corner
Flat top
.1 V
C8A (R)
C8B (R)
C28A (R)
C28B (R)
.2 V
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.5 V
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1 V
C5A (R)
C5B (R)
C25A (R)
C25B (R)
(6) Remove connection from +INPUT and connect to -INPUT.
(7) Press +INPUT pushbutton to GND and -INPUT pushbutton to DC.
(8) Set VOLTS/DIV switch to 10 mV.
(9) Repeat technique of (5) above for -INPUT.
b. Adjustments. No further adjustments can be made.
11. High-Frequency Response and Risetime
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 output to TI
+INPUT, using a 50 feedthrough termination.
(2) Position TI controls as listed in (a) through (e) below:
VOLTS/DIV switch to 50 mV.
(a)
+INPUT pushbutton to DC.
(b)
-INPUT pushbutton to GND.
(c)
VOLTS counter set to 0.000.
(d)
BW pushbutton to FULL.
(e)
(3) Set time base to 0.05 s and magnifier pushbutton to X10 (out).
(4) Press oscilloscope calibrator EDGE key. Set oscilloscope calibrator output
frequency to 100 kHz and set amplitude for 6 divisions of vertical deflection on oscilloscope.
Center displayed pulse vertically on crt.
(5) Measure risetime, using standard risetime technique. If risetime is not 3.5 ns or
less, and aberrations are not 1.5 minor divisions or less, perform appropriate procedure and
b. Adjustments. No further adjustments can be made.
12. Final Procedure
a. Deenergize and disconnect all equipment and reinstall protective cover on TI.
b. Annotate and affix DA label/form in accordance with TB 750-25.
