TB 9-6625-2239-24
11. Risetime and Bandwidth
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE MEASURE CHAN 1 to CH 1 input
through, a 50 feedthrough termination, and 5 - 80 pF standardizer.
(2) Set TIME/DIV switch to .2 ms, CH 1 and CH 2 VOLTS/DIV switch to 5m, and
press HORIZ DISPLAY A pushbutton to on (in).
(3) Set oscilloscope calibrator EDGE output for 5 divisions of vertical display at 1 kHz.
Adjust standardizer for optimum square wave. If waveform does not have a flat top and
square corner within 1 minor division, perform appropriate adjustment for model number
identified in table 9.
(4) Repeat technique of (2) and (3) above for TI VOLTS/DIV switch settings listed
in table 9 except do not readjust standardizer. If waveform at each setting does not have a
flat top or square corner within 1 minor division, perform appropriate adjustment for model
number identified in table 9.
(5) Remove connection from CH 1 input and connect to CH 2 input.
(6) Press VERT MODE CH 2 pushbutton to on (in) and repeat technique of (1)
through (4) above for CH 2. If waveform does not have a flat top and a square corner
within 1 minor division, perform appropriate adjustment for model identified in table 9.
Table 9. Voltage Compensation
VOLTS/
CH 1
CH 2
DIV
adjustments (R)
adjustments (R)
switch
Square
Flat
Square
Flat
Model
settings
Figure
corner
top
corner
top
AN/USM-425(V)1
5
m
---
C4101
---
C4201
50
m
C4107
C4108
C4207
C4208
0.5 V
C4104
C4105
C4204
C4205
Tektronix, Type 465
5
m
---
C1
---
C51
50 mV
C12
C13
C62
C63
0.5 V
C10
C11
C60
C61
Tektronix, Type 465B1
5
m
---
C13010
---
C13010
10
m
C36
C37
---
---
20
m
C34
C35
---
---
50
m
C32
C33
---
---
0.5 V
C30
C31
---
---
1 Adjustments
also affect CH 2.
(7) Set CH 1 and CH 2 VOLTS/DIV switches to 5 m.
(8) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI CH 2
INPUT, through 50 termination.
(9) Set A AND B TIME/DIV switches to 0.05 s (0.02 s for Tektronix, Type 465B)
and press X10 MAG pushbutton to on (in).
(10) Set oscilloscope calibrator EDGE output for 5 divisions of vertical display at 1 MHz.
If square wave displayed has aberrations exceeding +0.15 or -0.15 major divisions, or 0.15
major divisions total p-p (+0.2 or -0.2 major divisions or 0.2 major divisions total p-p for
