Tx If Mon (J6); Ref Monitor 10 Mhz (J7); Clock (J8); Data Interface (J9) - Radyne DMD2401 LB Installation And Operation Manual

Electrical Interfaces

5.2.6 TX IF MON (J6)

The Transimit IF Monitor Port (J6) is used for injecting an external reference frequency into the
modem. The DMD2401 LB/ST Master Oscillator is locked to this source. All internally
generated frequencies within the modem will attain the stability of the applied external reference.
The external reference must meet the following parameters:
Frequency:
Amplitude:
Type:
Stability:

5.2.7 REF MONITOR 10 MHz (J7)

The Reference Monitor Port (J7) is used for injecting an external reference frequency into the
modem. The DMD2401 LB/ST Master Oscillator is locked to this source. All internally
generated frequencies within the modem will attain the stability of the applied external reference.
The external reference must meet the following parameters:
Frequency:
Amplitude:
Type:

5.2.8 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:

5.2.9 DATA INTERFACE (J9)

The Data Interface Port (J9) is used for Synchronous Data Interface and allows the use of
RS-422, RS-232, and V.35 Interfaces. It is a 37-Pin Female Connector. Refer to Table 5-6 for
RS-422 connector pinouts, and Tables 5-7 and 5-8 for RS-232 and V.35 adapters.
5-4
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
10 MHz, 9 MHz, 5 MHz, 2.048 MHz or 1.024 MHz.
0.2 Vp-p to 5 Vp-p
Sinewave or Squarewave
-7
1 x 10 or Better
10 MHz, 9 MHz, 5 MHz, 2.048 MHz or 1.024 MHz.
0.2 Vp-p to 5 Vp-p
Sinewave or Squarewave
9600 Hz to 2.048 MHz
0.2 Vp-p to 5 Vp-p
Sinewave or Squarewave
TM075 – Rev. 1.3