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
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General