3 ecl interface (j8) – Comtech EF Data SDM-9000 User Manual
Page 54
Installation
SDM-9000 Satellite Modem
2–12
Rev. 4
2.4.8.3 ECL Interface (J8)
Signal Function
Name
Pin #
Ground
GND
1, 2
Send data input
TXD–A (ECL-)
37
TXD–B (ECL+)
38
Terrestrial timing input (TT)
TXO–A (ECL-)
4
TXO–B (ECL+)
5
SYNC TX frame input (TX SYNC)
SD–A (ECL-)
34
SD–B (ECL+)
18
Send timing output (ST)
TXC–A (ECL-)
21
TXC–B (ECL+)
22
Receive data output (RD)
RXD–A (ECL-)
39
RXD–B (ECL+)
40
Receive timing output (RT)
RXC–A (ECL-)
23
RXC–B (ECL+)
24
SYNC RX frame output (RX SYNC)
RD–A (ECL-)
36
RD–B (ECL+)
20
External clock input (EXC)
EXC- (ECL-)
35
EXC+ (ECL+)
19
ADPCM 1 audio input
A1I–A
45
A1I–B
29
ADPCM 1 audio output
A1O–A
46
A1O–B
30
ADPCM 2 audio input
A2I–A
47
A2I–B
31
ADPCM 2 audio output
A2O–A
48
A2O–B
32
Backward alarm 1 output
BWO1–C
8
(Note 1
)
BWO1–NC
25
BWO1–NO
41
Backward alarm 2 output
BWO2–C
9
(Note 1
)
BWO2–NC
26
BWO2–NO
42
Backward alarm 3 output
BWO3–C
10
(Note 1)
BWO3–NC
27
BWO3–NO
43
Backward alarm 4 output
BWO4–C
11
(Note 1)
BWO4–NC
28
BWO4–NO
44
Backward alarm 1 input
BWI1
12
(Note 2)
Backward alarm 2 input
BWI2
13
(Note 2
)
Backward alarm 3 input
BWI3
14
(Note 2)
Backward alarm 4 input
BWI4
15
(Note 2)
Modulator fault (TTL)
MF
49
(Note 3)
Demodulator fault (TTL)
DF
33
(Note 3
)
Deferred maintenance Alarm
DMA
17
(Note 3)
Demodulator fault relay
DF–C
16
(Note 4
)
DF–NO
50
AGC output (receive input, if level)
AGC–OUT
3