Technical Specifications
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
7-2
TM075 – Rev. 1.3
7.3 Demodulator/Receive Specifications
Frequency:
950 – 1750 MHz
Frequency Resolution:
100 Hz
Carrier Acquisition:
± 30 kHz
Input Carrier Range:
-65 to -40 dBm (Symbol Rate < 64 kHz)
-50 to -30 dBm (Symbol Rate > 640 kHz)
Aggregate Power:
Minimum of -10 dBm or 35 dBc
Impedance:
50Ù
Return Loss:
8 dB Minimum
Output Voltage:
24 V
Output Current:
5 A
10 MHz Reference Levels:
-10 dBm, ± 5 dB
Connector:
Type-F
Typical Eb/No (Viterbi)
Rate 1/2
Rate 3/4
Rate 7/8
@ BER=10
-5
5.1
6.2
7.5
@ BER=10
-7
6.2
7.7
8.6
Typical Eb/No (Trellis 8PSK)
Rate 2/3
@ BER=10
-5
7.2
@ BER=10
-7
8.9
Typical Eb/No, @ 64 Kbps
Sequential
Rate 1/2
Rate 3/4
Rate 7/8
@ BER=10
-5
4.0
5.0
6.1
@ BER=10
-7
4.9
5.9
7.4
Note: Eb/No typical values include effect of using differential encoding and V.35
scrambler.
Descrambler:
Intelsat V.35, mode selectable
Data Buffering:
8 bits to 262,144 bits, in 8-bit steps
Terrestrial Interfaces:
RS-449/-422, RS-232, V.35, V.E1, B.E1, B.T1.B825,
B.T1.AMI
7.4 Alarms
Summary Alarms:
Two separate Form-C Contacts available at the rear
panel. Each provides a summary alarm of fault
conditions.
7.5 Front Panel LED Indicators
Unit:
Power
Alarm
Event
Remote
Demodulator:
Signal Lock
Major Alarm
Minor Alarm
Test Mode
Modulator:
Transmit On
Major Alarm
Minor Alarm
Test Mode
