TM 11-6S25-2735-14-1
31. Check A and B +GATE Outputs
a. Connect A +GATE (output connector on rear panel)
to CH 1 input through a 42-inch 50-ohm BNC cable.
b. CHECK—The display for a positive pulse amplitude
of approximately 5 volts (it may be necessary to increase
INTENSITY to view leading edge of positive pulse).
c. Move cable from A +GATE to B +GATE (output
connectors on rear panel).
d. CHECK—Repeat part b.
e. Disconnect the cable between B +GATE and CH 1
connectors.
32. Check CH 2 VERT SIGNAL OUT
a. Set HORIZ DISPLAY to A, set TIME/DIV to 0.5 ms,
set CH 1 VOLTS/DIV to 0.1 V and set CH 2 VOLTS/DIV to
5 mV.
b. Set VERT MODE to CHOP, set CH 1 and CH 2
POSITION controls for 2 traces superimposed on center
horizontal graticule line, then set VERT MODE to CH 1.
c. Connect CH 2 VERT SIGNAL OUT (output connec-
tor on rear panel) to CH 1 input through a 42-inch 50-ohm
BNC cable.
d. Set amplitude calibrator for a 20 millivolt output and
connect to CH 2 input through a 42-inch 50-ohm BNC
cable.
e. Set A TRIGGER LEVEL for a stable triggered
display.
g. Set CH 1 VOLTS/DIV to 50 mV and insert a 50-ohm
termination between CH 1 input and the connected BNC
cable.
h. CHECK—Repeat part f.
i. Disconnect all test equipment.
33. Check EXT Z-AXIS Operation
a. Set amplitude calibrator for a 5 volt output and
connect to EXT Z-AXIS (input connector on rear panel)
through a 42-inch 50-ohm BNC cable.
b. CHECK—For noticeable modulation at normal in-
tensity. Adjust VAR TIME/DIV, if necessary to observe
modulation, then return to calibrated detent.
c. Disconnect all test equipment.
34. Check CALIBRATOR Operation
a. Set CH 1 VOLTS/DIV to 10 mV and set TIME/DIV to
1 ms.
b. Connect a 10X probe with a scale-factor switching
connector between CH 1 input and CALIBRATOR current
loop.
NOTE
Use a probe listed in test equipment required, Table
5-1, under 10X Probe examples.
c. CHECK—The square-wave display for 3 divisions
of amplitude and for approximately 1 cycle/division.
d. Disconnect all test equipment.
f. CHECK—The square-wave display for approximately
1 division of amplitude near center horizontal graticule line.
5-20
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