Hardware Options; Cdm-Qx/Qxl Hardware Options; Table 1-1. Cdm-Qx/Qxl Rear Panel Connectors - Base Chassis - Comtech EF Data CDM-Qx Installation And Operation Manual

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier®
Introduction
Table 1-1. CDM-Qx/QxL Rear Panel Connectors – Base Chassis
Connector Group
Power (Sect. 3.2.1) AC
DC (optional, CDM-QxL only)
Ground (Sect. 3.2.2)
Utility M&C 10/100 (Sect. 3.2.3)
(Sects. 3.2.3, 3.2.4,
485/232 (Sect 3.2.4)
3.2.6, 3.3.1)
Ref (Sect 3.2.6)
Alarms (not p/o base chassis – typical
for each data interface) (Sect. 3.3.1)
IF (Sect. 3.2.5)
Rx
Tx
Terrestrial Data Connectors vary dependant on the installed data interface (G.703 Bal, G.703 Unbal, EIA-530, Quad E1, or HSSI) module.
(Sect. 3.3) See Sect. 3.3.x for complete information about the connectors associated with these interfaces.
Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded cables for DATA
I/O. These cables must be double-shielded from end-to-end, ensuring a continuous ground shield.
1.3.6

Hardware Options

1.3.6.1

CDM-Qx/QxL Hardware Options

There are four hardware options available:
•
The first hardware option, Comtech EF Data's Turbo Product Codec (TPC), represents
a very significant development in the area of Forward Error Correction (FEC). It provides
one of the best FEC technologies currently available, and is now offered with a sufficient
range of code rates and modulation types to optimize link performance under any
conditions.
Turbo Product Codec consists of a plug-in daughter card (SIMM module) that is field
upgradeable. The TPC option provides data rate capability up to 20 Mbps, with the
following code rates:
o Rate 5/16 (BPSK)
o Rate 21/44 (BPSK, QPSK)
o Rate 3/4 (QPSK, 8-PSK, and 16-QAM)
o Rate 7/8 (QPSK, 8-PSK, and 16-QAM)
o Rate 17/18 (QPSK, 8-PSK)
•
The second hardware option is the Internal Reference Stability. The high stability
option includes a 6 x 10
the low stability option has a 1 x 10
option must be configured in the factory at the time of order.
•
The third hardware option is the IF Impedance and Connectors. The IF may be
configured with either BNC female connectors at 75Ω impedance, BNC female
Connector Name
See Sect. 3.5.1
See Sect. 3.5.2
#10-32 stud
RJ-45
9-pin Type 'D' female
BNC 50Ω female
15-pin Type 'D' male
CDM-Qx: BNC female (70/140MHz band)
CDM-QxL: Type 'N' female (L-Band)
CDM-Qx: BNC female (70/140MHz band)
CDM-QxL: Type 'N' female (L-Band)
-8
10 MHz reference oscillator on the IF Backplane board, while
-6
1–8
Connector Type
10 MHz reference on the IF Backplane board. This
Revision 7
MN/CDMQx.IOM
Function
Chassis power
Common Chassis Ground
10/100 BaseT Remote Interface
EIA Remote Interface
External reference for modem synthesizers
Form C Alarms (relay closures)
IF Input
IF Output