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AMT-70/AMT-73/AMT-75 Installation and Operation
RS-422/RS-449
Pin
RS-422/RS-449
Signal
Source
RS-530 Pin
P1-6 RD-A
DCE
P3-3
P1-24 RD-B
DCE
P3-16
P1-8 RT-A
DCE
P3-17
P1-26 RT-B
DCE
P3-9
Notes:
P1 is a male DB-37 connector that connects to the BERT.
P2 is a male DB-25 connector that connects to the Modulator.
P3 is a male DB-25 connector that connects to the Demodulator.
Wire A/B pairs using # 28 AWG twisted pair.
8.4
RS-530 Data Interface Pin-Outs (AMT-70)
The 25-pin D connector (labeled P2 of the AMT-70) TX/RX DATA RS-530 on the rear panel has the
pin-outs listed in the figure below
.
Figure 48: RS-530 Data Interface Pin-Outs
DB-25 Pin
Number
RS-530
Name
Common Name
Description
DIRECTION
Pin 2
BA-A
TD-A
Transmit Data (A)
To Modem
Pin 14
BA-B
TD-B
Transmit Data (B)
To Modem
Pin 24
DA-A
SCTE-A
Transmit Signal Element Timing DTE (A)
To Modem
Pin 11
DA-B
SCTE-B
Transmit Signal Element Timing DTE (B)
To Modem
Pin 15
DB-A
SCT-A
Transmit Signal Element Timing DCE (A)
From Modem
Pin 12
SCT-B
DB-B
Transmit Signal Element Timing DCE (B)
From Modem
Pin 5
CB-A
CTS-A
Clear to Send (A)
From Modem
Pin 13
CB-B
CTS-B
Clear to Send (B)
From Modem
Pin 4
CA-A
RTS-A
Request to Send (A)
To Modem
Pin 19
CA-B
RTS-B
Request to Send (B)
To Modem
Pin 3
BB-A
RD-A
Receive Data (A)
From Modem
Pin 16
BB-B
RD-B
Receive Data (B)
From Modem
Pin 17
DD-A
RT-A
Received Signal Element Timing DCE (A)
From Modem
Pin 9
DD-B
RT-B
Received Signal Element Timing DCE (B)
From Modem
Pin 6
CC-A
DCE Ready-A
DCE Ready-A
From Modem
Pin 22
CC-B
DCE Ready-B
DCE Ready-B
From Modem
Pin 8
CF-A
RLSD-A
Received Line Signal Detect (A)
From Modem
Pin 10
CF-B
RLSD-B
Received Line Signal Detect (B)
From Modem
Pin 7
GND
GND
GND
Pin 25
TM
-12 V
Test Mode
From Modem
Pin 1
SHIELD
SHIELD
GND
From Modem
109
Summary of Contents for AMT-70
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