Mocomtech CDM-QX - Manual (Page 36)

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Introduction MN/CDMQx.IOM
1–12
Table 1-2. FAST and FAST-accessible Hardware Options
Modulator & Demodulator
Options
Description and Comments
Option
Installation
Method
Low Rate Variable Data rate 32 kbps to 5 Mbps Base Unit
Mid-Rate Variable Data rate 32 kbps to 10.0 Mbps
FAST
Full Rate Variable Data rate 32 kbps to 20.0 Mbps
8-PSK Modulation Type
16-QAM Modulation Type
D&I++ Drop and Insert
DoubleTalk Carrier-in-Carrier
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
Redundancy Capability 1:1 or 1:2 or 1:3 Redundancy
Turbo Codec – high rate
20 Mbps Turbo Codec
512 kpbs, 2048 kbps, 5 Mbps, 10 Mbps, 20 Mbps FAST or
Hardware
High Stability Reference Internal 10 MHz reference – 6 x 10
-8
Hardware
(Factory-installed
only)
Low Stability Reference Internal 10 MHz reference – 1 x 10 -6
75
Ω TX/RX Impedance
75
Ω impedance with BNC female connectors
50
Ω TX/RX Impedance
50
Ω impedance with N female connectors (L-Band)
1.3.13 Supporting Hardware and Software
Redundancy Applications
For 1:1 and 1:N redundancy applications, the CDM-Qx/QxL is supported by the following Comtech
EF Data switching products:
CEFD Product Description CDM-Qx CDM-QxL
CRS-311 1:1 Redundancy Switch
X X
CRS-300 1:10 Redundancy Switch
X X
CRS-280
*
IF Switch (70/140 MHz)
X
CRS-280L
*
IF Switch (L-Band)
X
* For use in 1:N applications only. Up to one modulator and one demodulator allowed per CDM-Qx/QxL.
ODU Interoperability via FSK / EDMAC
The CDM-QxL incorporates a Frequency Shift Keyed (FSK) serial link that, when activated on the
Rx-IF port of a CDM-QxL, enables the modem to communicate with the Comtech EF Data line of
RF Ku- and C-Band Transceivers.