Specifications

SDM-100A Satellite Modem Options
Rev. 0 B–11
B.1.3.5 Specifications
Terrestrial Interface
Data Rate 9.6 to 224 kHz
Overhead 1/16 overhead
Coding BPSK 1/2, QPSK 1/2, 3/4, 7/8
ASYNC Interface
ASYNC Interface Types RS-485 or RS-232-C
2-wire or 4-wire
Channel Formats Data bits 5 to 8
Parity = odd, even, or none
Stop bits = 1 and 2, 150 to 2400 baud
B.1.3.6 Mechanical Specifications for Connector J1
Pin # Name Function
37 SD_A SEND DATA
38 SD_B SEND DATA
35 EXC_A EXT. CLOCK (MC MASTER CLOCK)
19 EXC_B EXT. CLOCK (MC MASTER CLOCK)
39 RD_A RECEIVE DATA
40 RD_B RECEIVE DATA
4 TXD_B TX DATA (ASYNC CHANNEL)
5 TXD_A TX DATA (ASYNC CHANNEL)
21 ST SEND TIMING
22 ST SEND TIMING
23 RT_A RECEIVE TIMING
24 RT_B RECEIVE TIMING
6 RXD_B RX DATA (ASYNC CHANNEL)
7 RXD_A RX DATA (ASYNC CHANNEL)
41 DM_A DATA MODE
32 DM_B DATA MODE
12 TT_A TERMINAL TIMING
13 TT_B TERMINAL TIMING
45 RTS_A REQUEST TO SEND
29 RTS_B REQUEST TO SEND
46 RR_A RECEIVE READY
30 RR_B RECEIVE READY
47 CTS_A CLEAR TO SEND
31 CTS_B CLEAR TO SEND
49 MF MODULATOR FAULT
33 DF DEMODULATOR FAULT