TM 11-5821-333-30
6-6. TEST ADAPTER. Continued
f. Test Points. There are 24 test points (TP) on the test adapter. They provide access to individual signals
during operation. Their signals are listed in table 6-2.
Table 6-2, Test Point Signals
TEST POINT
MONITORS
USUAL SIGNAL (WHEN ACTIVE)
1
RT UUT TUNE CLOCK (J2-B)
DIGITAL CLOCK
2
RT UUT TUNE GATE-N (J2-C)
DIGITAL PULSES
(LOGIC 1 TO LOGIC O)
3
RT UUT SERIAL DATA (J2-T)
DIGITAL DATA
4
RELAY K2
+28 V RELAY INACTIVE
O V RELAY ACTIVE
5
RELAY K3
+28 V RELAY INACTIVE
O V RELAY ACTIVE
6
RELAY K1
+28 V RELAY INACTIVE
O V RELAY ACTIVE
7
(NOT USED)
8
(NOT USED)
9
REF RT DATA OUT
DIGITAL DATA
10
REF RT RCV XMODE
DIGITAL DATA
11
REF RT RCV AUDIO
AUDIO SIGNALS
12
REF RT XMT AUDIO
AUDIO SIGNALS
13
REF RT XMODE XMT
DIGITAL DATA
14
XMODE SEL
LOGIC 1 FOR DIGITAL
XMODE SIGNALS
LOGIC O FOR ANALOG
XMODE SIGNALS
15
(NOT USED)
16
(NOT USED)
17
ICS XMT AUDIO
AUDIO SIGNALS
18
ICS RCV AUDIO
AUDIO SIGNALS
19
(NOT USED)
20
(NOT USED)
21
VOLTAGE REGULATOR U1 OUTPUT
5 V DC
22
6.75 V SUPPLY
6.75 V DC
23
28 V SUPPLY
28 V DC
24
GROUND (J21-B)
GND (O V DC)
6-9