TM 11-6625-622-40
Ccontrol settings
step
Performance standard
Test: procedure
Equipment under test
No.
Test equipment
ME-26B/U must indicate infinite
Connect test leads of ME-26B/U
KEY INTLK switch: NORMAL.
9 Same as step 7 . . .
resistance.
to following point:
From
To
j-56
J1-5
ME-26B/U must indicate infinite
Connect test leads of ME-Z5B/'U
CW switch: center.
10 Same as step 7...
resistance.
to following point:
From
To
W5-k
Ground
ME-26B/U must indicate infinite
Connect test leads of MS-26B/U to
AUDIO LOAD switch: OUT.
11 Same as step 7...
resistance.
following point
J11-2
J11-1
ME-26B/U must indicate infinite
Connect test leads of ME-26B/U
2
714E-1--714E- /3-714E-6 switch
12 Same as step 7...
resistance for all points listed in
to following points
S6: 714E- 2/3.
this step.
To
W5-j
J1-24
W5-i
J1-25
W5-q
J1-59
W5-m
J1-55
CAUTION
Improper connection of test set can damage diode. Connect positive lead to J6, and negative lead to J1.
(1) Connect the equipment as shown in figure 3-7
3-14. Directional Wattmeter Calibration
or 3-8 and apply power, allowing the receiver-transmit-
Test
ter to warm up.
a. Test Equipment and Materials. Receiver-
(2) No conditions necessary.
transmitter, and Wattmeter.
b. Test Connections and Conditions.
c. Procedure.
step
Control settings
Performance standard
Test procedure
Equipment under test
No
Test equipment
--
RF OUTPUT meter M1 will indicate
Key receiver-transmitter in AM
WATTS switch: FORWARD 200.
1 None . . . . . . . . . . . .
25 watts of the power measured
mode at 3.5 MHz, 14.0 MHz, and
Mode selector AM.
on Wattmeter AN/URM -120.
29.5 MHz.
NOTE
The AN/URM-120 must indicate NLT
100 watts.
RF OUTPUT meter M1 will indicate
Key receiver-transmitter in AM
2 None . . . . . . . . . . . .
WATTS switch: FORWARD 2000.
35 watts (on bottom scale) of the
mode at 3.5 MHz, 14.0 MHz, and
Mode selector AM.
power measured on Wattmeter
29.5 MHz.
AN/URM-120.
RF OUTPUT meter M1 will indicate
Key receiver-transmitter in AM
WATTS switch: REFLECTED 200.
3 None . . . . . . . . . . . .
not more than 1.5 watts.
mode at 8.5 MHz, 14.0 MHz, and
Mode selector AM.
29.5 MHz.
RF OUTPUT meter M1 will not indi-
WATTS switch: REFLECTED Key receiver-transmitter in AM
4 None . . . . . . . . . . . .
cate
mode at 3.5 MHz, 14.0 MHz, and
2000.
29.5 MHz.
Mode selector AM.
Infinite resistance.
7
3-15. Test Data Summary
Infinite resistance.
8
Maintenance personnel may find it convenient to ar-
Infinite resistance.
9
range the checklist in a manner similar to that below:
Infinite resistance.
10
1. CONTINUITY AND SHORT-CIRCUIT TESTS
Infinite resistance.
11
All checkpoints measure infinite resistance.
12
NOTE
2. DIRECTIONAL WATTMETER CALIBRATION TEST
The numbers in the Step No. column below are refer-
NOTE
ences to numbers in the Step No. column in paragraph
The numbers in the Step No. column below are refer-
ences to numbers in the Step No. column in paragraph
Indication
Step No.
1
All checkpoints measure 0 ohm.
Indication
Step No
2
0 ohm for both positions of the KEY switch.
100 watts 25.
1
3
0 ohm.
Approximately 100 watts.
2
4
0 ohm for both positions of the CW KEY or CW switch.
Not more than 1.5 watts.
3
5
0 ohm.
No indication.
4
All checkpoints measure 0 ohm.
6
Change 1
3-13
