Options Summary; Figure 1-1. Block Diagram - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Introduction
Refer to Figure 1-1 for a system block diagram.
AC Or
Optional
DC
Prime
Power
User
Data
AUX 1
OC-TTL
Faults
Form C
Contacts
Remote
Port
1.2

Options Summary

A summary of the available options for the unit is provided. Contact Comtech EF Data
Customer Support for upgrade information.
Option
Single Data/Code Rate
Low Rate Variable
Full Rate Variable
Offset QPSK
8-PSK
TX/RX L-Band ± 0.02 ppm
TX only, L-Band ± 0.02 ppm
RX only, L-Band ± 1.0 ppm
TX/RX L-Band ± 1.0 ppm
Sequential or Viterbi Codec
TX Reed-Solomon Codec
RX Reed-Solomon Codec
Power AC Only
Power
Supply
Supply
Tx Data
Tx Clock
Data ST Clock
Data
J8
Interface
Interface
Rx Data
Rx Clock
AUX 1 Sat Clock
J9
AUX 1
AUX 1
Fault Relays
J7
Control / Status
Alarm Relays
J10
M&C
M&C
Remote Port
J6

Figure 1-1. Block Diagram

Description /Comment
≤ 512 kbps
≤ 5.0 Mbps
Requires Viterbi, Reed-Solomon Codec.
Overhead card required for Open
Network.
L-Band Modem with high stability
reference.
Hardware limited with high stability
reference.
Hardware limited with 1 ppm reference
L-Band modem with 1 ppm reference
Modem can be supplied with either:
Viterbi, Sequential
Concatenates with Viterbi
Concatenates with Viterbi
Opt ODU
Opt ODU
Ref Osc
Ref Osc
Supply
Supply
Ext Ref
Encoder /
Encoder /
Modulator
Modulator
Tx IF
Note 1
Demodulator
Rx IF
Demodulator
I/Q
/ Decoder
/ Decoder
Note 2
AGC
SNM-1001L Satellite Modem
1–2
MN/SNM1001L.IOM
CP2
CP1
Transmit
Transmit
RF Equipment
RF Equipment
CP3
LNB
LNB
Notes:
1) Tx IF (L-Band only) Outputs a 10 MHz
Reference and Optional ODU Voltage.
2) Rx IF Outputs LNB Voltage and 10 MHz
Reference.
Availability Install Option
Yes FAST
Yes FAST
Yes FAST
Yes FAST
Yes User
Standard Factory
Yes Factory
Yes Factory
Yes Factory
Yes FAST
Yes User
Yes User
Revision 1