Fast Accessible Options; Fast System Theory - Comtech EF Data CDM-Qx Installation And Operation Manual

CDM-Qx Satellite Modem
Introduction
The following table shows what other options are available:
Modulator & Demodulator
Options
Low Rate Variable
Mid-Rate Variable
Full Rate Variable
8-PSK
16-QAM
D&I++
DoubleTalk Carrier-in-Carrier
Redundancy Capability
Turbo Codec – high rate
High Stability Reference
Low Stability Reference
75Ω TX/RX Impedance
50Ω TX/RX Impedance
1.4.1

FAST Accessible Options

Comtech EF Data's FAST system allows immediate implementation of different options
through the user interface keypad. All FAST options are available through the basic
platform unit.
1.4.2

FAST System Theory

FAST is an enhancement feature available in Comtech EF Data products, enabling on-
location upgrade of the operating feature set - in the rack - without removing a modem
from the setup. When service requirements change, the operator can upgrade the topology
of the modem to meet those requirements within minutes after confirmation by Comtech
EF Data. This accelerated upgrade can be accomplished only because of FAST's
extensive use of programmable devices incorporating Comtech EF Data-proprietary
signal processing techniques. These techniques allow the use of a unique access code to
enable configuration of the available hardware. The access code can be purchased at any
time from Comtech EF Data. Once obtained, the access code is loaded into the unit
through the front panel keyboard or the rear remote port.
With the exclusive FAST technology, operators have maximum flexibility for enabling
functions as they are required. FAST allows an operator to order a modem precisely
tailored for the initial application.
Description and Comments
Data rate 32 kbps to 5 Mbps
Data rate 32 kbps to 10.0 Mbps
Data rate 32 kbps to 20.0 Mbps
Modulation Type
Modulation Type
Drop and Insert
128 ksps – 512 kbps
128 ksps – 1 Mbps
128 ksps – 2.5 Mbps
128 ksps – 5 Mbps
128 ksps – 10 Mbps
128 ksps – 20 Mbps
1:1 or 1:2 or 1:3 Redundancy
20 Mbps Turbo Codec
512 kpbs, 2048 kbps, 5 Mbps, 10 Mbps, 20 Mbps
Internal 10 MHz reference – 0.1 x 10
Internal 10 MHz reference – 1 x 10
75Ω impedance with BNC female connectors
50Ω impedance with N female connectors (L-Band)
1–5
MN/CDMQx.IOM
Option
Installation
Method
Base Unit
FAST
FAST or
Hardware
-6
Hardware
-6
(Factory-installed
only)
Revision 6