Product specifications

CRS-170A L-Band 1:1 Redundancy Switch Revision 3
Connector Pinouts MN/CRS170A.IOM
5.2 Modem Side Type ‘N’ Connectors
There are four 50Ω Type ‘N’ female connectors located on the modem side of the
CRS-170A L-Band 1:1 Redundancy Switch module. Refer to Table 5-1 for details.
Table 5-1. Modem Side Type ‘N’ Connectors
Type ‘N’
Connector
Ref Des Description Direction
RX A J1
RX-IF signal Out
LNB 10 MHz Ref In
LNB Power In
RX B J2
RX-IF signal Out
LNB 10 MHz Ref In
LNB Power In
TX A J5
TX-IF signal In
BUC 10 MHz Ref In
BUC FSK Comm. In/Out
BUC Power In
TX B J6
TX-IF signal In
BUC 10 MHz Ref In
BUC FSK Comm. In/Out
BUC Power In
5.3 J3 Control Connector (Top) – Modem ‘A’, DB-9F
The Modem ‘A’ Control connector is a 9-pin Type ‘D’ female interface located
on the modem side of the CRS-170A L-Band 1:1 Redundancy Switch module.
Refer to Table 5-2 for pin assignments. Pins 2, 3, and 4 carry signals looped
through the switch module from Modem B to Modem A, while pins 6, 7, and
8 loop the same signals from Modem A through to Modem B. The 12VDC
input, which is diode OR’ed with the corresponding 12VDC input from
modem B, powers the switch module.
Table 5-2. J3 - Modem ‘A’ Control Connector Pin Assignments
Pin # Signal Function Signal Name Direction
1 Signal Ground Ground -
2 Modem B Tx Comm AUX_SER_TX_B Out
3 Modem B Clk Out CLK_OUT_B Out
4 Modem A Online ONLINE_A Out
5 Signal Ground Ground -
6 Modem A Tx Comm AUX_SER_TX_A In
7 Modem A Clk In CLK_IN_A In
8 Modem A Serial Faults SERIAL_FAULT_A In
9 +12 VDC +12VDC In
5–2