Radyne DMD2401 Operation Manual page 144

DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
3 BAL EXC-A
21 BAL EXC-B
16 RX-0-A
34 RX-0 B
17 TT-A
35 TT-B
1, 19, 20, 37 GND
*
Note: The DMD2401 Satellite Modem constantly asserts the DM/DSR Signal (DM and DSR
are actually the same signal). The modem is always in the condition of being able to
accept data. DTR Input to the modem is not necessary and is ignored. The DM/DSR
Output of the modem is located on Pins 11 and 29 as shown above.
5.2.9.1 RS-232 Adapter to J9
Table 5-7 provides the pinouts if the user wishes to fabricate an adapter from a 25-Pin, RS-232 to
J9.
25-Pin Signal
Connector
7 GND
4 RTS
5 CTS
6 DM
8 RR
2 SD
3 RD
24 TT
17 RT
15 ST
TM065 - Rev. 3.3
External Clock A (-)
External Clock B (+)
Receive Octet A (-)
Receive Octet B (+)
Terminal Timing A (-)
Terminal Timing B (+)
Signal Ground
Table 5-7. 25-Pin RS-232 Adapter to J9
37-Pin Signal
Connector
(J9)
1
7
9
11 DM-A (DSR)
13 RR-A (RLSD) Receive Ready A
4
6
17
8
5
Description
GND Signal Ground
RS-A Request to Send A
(-)
CS-A Clear to Send A
(-)
Data Mode A
(-)
(-)
SD-A Send Data A
(-)
RD-A Receive Data A
(-)
TT-B Transmit Timing A
(-)
RT-A Receive Timing A
(-)
ST-A Send Timing A
(-)
Electrical Interfaces
Input
Input
Output
Output
Input
Input
–
Direction
---
Input
Output
Output
Output
Input
Output
Input
Output
Output
5-5