TM 9-4935-481-14-1
C3
Table 3-11. DMS-D Performance Test-Continued
Table 3-11. DMS-D Performance Test-Continued
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
Sum Automatic
179
OSC
-/+ pushbutton switch to -.
164
SDS
Adjust ALIGN 1 control to 0.0000 0.0003 Vdc reading.
180
OSC
INT/EXT pushbutton switch to EXT.
DMM
181
OSC
AC/DC pushbutton switch to AC.
(23)
182
MCP
Connect a cable from J13 to the Oscilloscope A INPUT.
165
ITP
INTERNAL TEST switch to 3.
183
MCP
Connect a 1W20 cable from J12 to the Oscilloscope EXT TRIG INPUT1.
.
166
PPE
Momentarily actuate TEST START switch.
184
MCP
SELECTOR A switch to F1.
167
Wait > 20 seconds before continuing.
185
MCP
SELECTOR B switch to F1.
168
SDS
Adjust ALIGN 2 control to +9.700 0.002 Vdc.
186
MCP
SELECTOR C switch to F5.
DMM
(24)
187
CIP
RUN/HOLD/OFF switch to HOLD.
169
PPE
SEQUENCE switch to AUTO 1.
188
CIP
COUNTER INHIBIT(SEC) dial to 13.11.
170
CIP
COUNTER INHIBIT(SEC) dial to 13.09.
189
OSC
Adjust TRIGGER LEVEL cw until waveform just sweeps. Continue adjusting cw until waveform no
longer sweeps.
171
CIP
RUN/HOLD/OFF switch to RUN.
190
OSC
TIME/DIV switch to .2 SEC.
172
PPE
Momentarily actuate TEST START switch.
191
MCP
Disconnect cable from oscilloscope EXT TRIG INPUT + 1 and J12.'
173
CIP
Observe INHIB lamp illuminated after = 13 seconds.
192
MCP
174
PPE
Rotate SEQUENCE switch from AUTO 1 through AUTO 16 and back to AUTO 1. Observe nominal
193
CIP
RUN/HOLD/OFF switch to RUN and observe the waveform drops to OSC zero volts for 315 to 585
readings of +0.4216 to +0.4268 Vdc. (Disregard any changes due to noise).
msec, then expands to a level o 0.2 VP-P.
f
DMM
(26)
(25)
(*)
NOTE
If the DMM reading at the selected switch position is out of tolerance,
momentarily actuate the PPE TEST START switch and allow the INHIB lamp
To repeat, perform steps 169, 171, 172, 187, 188 and 193.
to illuminate, then recheck for a correct DMM reading.
194
MCP.
SELECTOR A switch to E8
175
OSC
CHANNEL A input coupling switch to DC.
195
PPE.
Set SEQUENCE switch to the positions indicated and observe the DMM reading for each switch setting.
176
OSC
A input VOLTS/DIV switch to .2.
(*) (See Step 174)
177
OSC
TIME/DIV switch to 50 psec.
178
OSC
AUTO/NORM pushbutton switch to NORM.
3-83