Clock (J8); Bal (J8); Sd (J9); Rd (J10) - Radyne DMD2401 LB Installation And Operation Manual

Electrical Interfaces

5.4.8 CLOCK (J8)

The External Clock Port (J8) is used for injecting an external data clock into the modem. The
data symbol clocks may then be selected to be locked to this source. The external clock must
meet the following requirements:
Frequency:
Amplitude:
Type:
5.4.9 G.703 BAL (J8)
The G.703 Balanced Port (J8) are the G.703 balanced data connectors. It is a 15-Pin Female
"D" Connector. Refer to Table 5-10 for connector pinouts.
Pin Number Signal
1 SD-A
2 GND
9 SD-B
7 BAL EXC-A
8 BAL EXC-B
3 RD-A
4 GND
11 RD-B
12 DDO-A
5 DDO-B
13 IDI-A
6 IDI-B
14 MOD FLT
15 DMD FLT

5.4.10 SD (J9)

The Send Data Port (J9) is the unbalanced Send Data BNC Connector.

5.4.11 RD (J10)

The Receive Data Port (J10) is the unbalanced Receive Data BNC Connector.

5.4.12 TX DC VOLTAGE INDICATOR

The Transmit DC Voltage Indicator shows if there is DC Voltage present at J2.
5-12
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
9600 Hz to 2.048 MHz
0.2 Vp-p to 5 Vp-p
Sinewave or Squarewave
Table 5-10. G.703 BAL - 15-Pin Connector (J10)
Send Data A (-)
Ground
Send Data B (+)
External Clock A (-)
External Clock B (+)
Receive Data A (-)
Ground
Receive Data B (+)
Drop Data Out A (-)
Drop Data Out B (+)
Insert Data In A (-)
Insert Data In B (+)
Mod Fault – Open Collector
Demod Fault – Open Collector
Description Direction
Input
–
Input
Input
Input
Output
–
Output
Output
Output
Input
Input
Output
Output
TM075 – Rev. 1.3