NEC DTU-70 Instruction Manual page 80

18kw uhf digital tv transmitter
Table of Contents

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Use
No.
Item
13
TX ON CONT
MEMORY
14
TX ON ANS
15
TX REMOTE ANS
16
PUMP ON ANS
17
EX CH COMMAND
18
EX CH CONT
19
EX INPUT
20
EXCITER FAULT
(NON LATCH)
21
PA OUTPUT FAULT
22
(A PA OUTPUT
FAULT)
23
RS-422
Table 3-15 (continued)
J5 (on the
Interface
Board)
Terminal No.
+
-
19
34/35 Means the reception of ON command
20
34/35 Means the TX ON condition.
21
34/35 TX Remote Mode Operation.
23
34/35 Means the ON condition of PUMP.
24
34/35 Means the occurrence of an abnormality
which urges changeover to the stand-by
exciter.
27
34/35 Sends out the EX CHANGE signal as an
exciter changeover signal when the exciter
in use came to a fault.
28
34/35 When a signal is entered into the exciter
INPUT, the INPUT signal is sent out.
29
34/35 Output level of the exciter becomes 3dB
below the preset level.
32
34/35 The output power of any PA becomes 2dB
below the preset level.
12
34/35 (Reserved).
36
Receive Data+ (RxD+)
Receive Data - (RxD-)
37
Transmit Data + (TxD+)
38
Transmit Data - (TxD-)
39
40
Signal ground
3 - 32
GWP-G22996
Description

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