Hardware Options; Standard Hardware; Optional Hardware; Data Interfaces - Comtech EF Data CDM-750 Installation And Operation Manual

CDM-750 Advanced High-Speed Trunking Modem
Introduction
1.3.5

Hardware Options

1.3.5.1

Standard Hardware

•
75Ω IF (70/140 MHz), 50Ω L-Band (950-2150 MHz)
•
115/230 volt unit AC power supply.
1.3.5.2

Optional Hardware

•
DoubleTalk
technology, DoubleTalk Carrier-in-Carrier (referred to throughout this manual as CnC)
allows transmit and receive carriers of a duplex link to share the same transponder space.
This plug-in daughter card can either be factory-installed at the time of ordering, or field-
installed by the user. Refer to Chapter 8. DoubleTalk Carrier-in-Carrier OPTION for
further information.
•
Rear-Mounting (back of rack) Support Brackets. Refer to Sect. 2.2.1 for details.
•
Chassis-mounted Bearingless Side Railings. Refer to Sect. 2.2.2 for details.
•
(FUTURE)
•
(FUTURE)
1.3.6

Data Interfaces

•
As standard, two Gigabit Ethernet interfaces are provided.
•
The optional Optical Gigabit Ethernet interface is available, via the J7 OPTICAL port (a
SFP [Small Form Factor Pluggable] Module socket) provided at the CDM-750 rear panel.
•
The optional G.703 E3/T3/STS-1 (34.368/44.768/51.84 Mbps) interface(s) may be
installed in the two PIIC (Plug-In Interface Card) slots provided at the CDM-750 rear
panel.
•
Additional PIIC-compatible data interface options (e.g., ASI, OC3, HSSI, etc.) will
become available with future releases.
1.3.7

Verification

The CDM-750 Advanced High-Speed Trunking Modem includes many test modes and
loopbacks for rapid verification of the correct functioning of the unit. Of particular note is the
IF loopback, which permits the user to perform a quick diagnostic test without having to disturb
external cabling. During the loopback, all of the receive configuration parameters are
temporarily changed to match those of the transmit side, and an internal RF switch connects the
modulator output to the demodulator input. When normal operation is again selected, all of the
previous values are restored.
TM
Carrier-in-Carrier
48 volt unit DC power supply.
24 volt or 48 volt BUC DC power supplies.
1–7
®
options: Based on "Adaptive Cancellation"
Revision 1
MN-CDM750