Comtech EF Data RCS10 - Manual (Page 28)

Appendix A RCS10 Technical Specifications
Page 1-1
Section 1 - RCS10 Redundant Communication System Description
1.1 Introduction
As shown in Figure 1-1, Radyne ComStream's RCS10 is
a complete, self-contained modem system with all
modems, terrestrial interfaces and redundancy switch
functions included in a single equipment cabinet that is
10 rack units high (17.5 inches). This compact and
versatile common equipment package is unique and
offers unsurpassed performance, reliability and flexibility.
In addition to full support for Intelsat's IDR/IBS services,
the system may be operated in closed networks.
The built-in M:N Redundancy Switch is an intelligent
microcomputer controlled system, capable of controlling
up to ten DMD10 modems in a variety of configurations.
The switch can be operated automatically, in which case
an automatic back-up of a failed on-line modem occurs
after a preprogrammed delay. The switch may also be
operated manually, allowing the operator to manually
switch in the backup unit. Front panel controls and
indicators provide for auto/manual configuration, as well
as display of online/off-line status information for all
modems in the redundancy configuration.
All switch and modem operating parameters, such as
variable data rates and selectable IBS/IDR framing, are easily set and changed by the operator.
The modem and redundancy switch monitor and control functions are available at the front panel of
the system (Refer to Section 3). All functions may also be accessed through a terminal or a
personal computer via a serial link (RS485 or Ethernet) for complete remote monitoring and control
capability.
When used with the optional IFC10 IF Combiner/Splitter system, the RCS10 system provides all of
the signal combiners and splitters, terminations and interconnecting cables that are necessary to
connect any combination of up to nine active modems to nine independent uplink and nine
independent downlink transponders. Refer to Figure 1-3, RCS10 System Block Diagram for a basic
overview of the RCS10 system components.
1.2 External Reference
The External Reference Module, located in slot 10 on the far left side of the RCS10 rear panel (See
Figure 1-2), has one External IF Reference input which is distributed to all ten DMD1O modems.
Each modem’s on-board system oscillator can be individually locked to the external reference.
Additionally, the external reference module can be equipped with a 10 -7 high stability reference
oscillator which is distributed to all ten DMD10 modems, thus providing a low-cost high-stability
option. An External IF reference output is also provided for distribution to other equipment.
Also, the external reference has one BNC clock input which is distributed to all ten modems. Each
modem control can independently select this external clock as its Tx clock and/or RX buffered
clock source.
RCS10 FEATURES
•
Ten Modems and a Redundancy Switch in a
10 Rack Unit (17.5 inches) enclosure
•
Up to 30 Modems in One Rack
•
Large Display with Easy-to-use Menu Structure
•
Built-in M:N Redundancy Switch
•
Dual Redundant Power Supplies
•
Fewer Cables Simplifies Installation
•
Fully-Compliant with IESS 308/309
•
Operation from 9.6 Kbps to 8.448 Mbps
•
Options Include Drop and Insert, Reed-Solomon
Codec, Sequential Decoder, Trellis Coded
Modulation, ESC, OQPSK, 8PSK Modulation and
Ethernet Remote M&C.