CRS-100 1:1 Redundancy Switch Operation Manual (Accessory Product for use only with Comtech EFData CDM-500/550/550T Modems) Part Number MN/CRS100.
Errata A Comtech EFData Documentation Update Subject: Change Part No. for AUX Cable Date: Document: January 6, 2006 CRS-100 1:1 Redundancy Switch Operation Manual, Revision 2, dated November 1, 2005 MN/CRS100.
COMTECH PART NO. PL/WR9320-1 Figure 2-1.
Errata B Comtech EFData Documentation Update Subject: Change Part No. for AUX Cable Date: Document: January 6, 2006 CRS-100 1:1 Redundancy Switch Operation Manual, Revision 2, dated November 1, 2005 MN/CRS100.
CRS-100 1:1 Redundancy Switch Operation Manual (Accessory Product for use only with Comtech EF Data CDM-500/550/550T Modems) Comtech EF Data is an ISO 9001 Registered Company Part Number MN/CRS100.IOM Revision 2 November 1, 2005 Copyright © Comtech EF Data, 2000. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.
Customer Support Contact the Comtech EF Data Customer Support Department for: • Product support or training • Information on upgrading or returning a product • Reporting comments or suggestions concerning manuals A Customer Support representative may be reached at: Comtech EF Data Attention: Customer Support Department 2114 West 7th Street Tempe, Arizona 85281 USA 480.333.2200 (Main Comtech EF Data Number) 480.333.4357 (Customer Support Desk) 480.333.
Table of Contents CHAPTER 1. INTRODUCTION ................................................................................ 1–1 CHAPTER 2. INSTALLATION ................................................................................. 2–1 2.1 Unpacking ...................................................................................................................................................2–1 2.2 Mounting .........................................................................................
CRS-100 1:1 Redundancy Switch Preface CHAPTER 6. Revision 2 MN/CRS100.IOM OPERATION ...................................................................................... 6–1 6.1 AUTOMATIC OPERATION....................................................................................................................6–1 6.1.1 INFO (Information)..................................................................................................................................6–1 6.1.
CRS-100 1:1 Redundancy Switch Preface Revision 2 MN/CRS100.IOM About this Manual This manual provides installation and operation information for the Comtech EF Data CRS-100 1:1 Redundancy Switch. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the CRS-100 1:1 Redundancy Switch.
CRS-100 1:1 Redundancy Switch Preface Revision 2 MN/CRS100.IOM IMPORTANT INFORMATION – PLEASE READ BEFORE INSTALLATION AND USE Safety Notices Electrical Safety The CRS-100 1:1 Redundancy Switch has been shown to comply with the following safety standard: EN 60950: Safety of Information Technology Equipment, including electrical business machines The equipment is rated for operation at +12 volts DC and -12 volts DC. It has a maximum power consumption of 3.
CRS-100 1:1 Redundancy Switch Preface Revision 2 MN/CRS100.IOM Operation in vehicles or other transportable installations which are equipped to provide a stable environment is permitted.
CRS-100 1:1 Redundancy Switch Preface Revision 2 MN/CRS100.
CRS-100 1:1 Redundancy Switch Preface Revision 2 MN/CRS100.IOM Warranty Policy This Comtech EF Data product is warranted against defects in material and workmanship for a period of two years from the date of shipment. During the warranty period, Comtech EF Data will, at its option, repair or replace products that prove to be defective. For equipment under warranty, the customer is responsible for freight to Comtech EF Data and all related custom, taxes, tariffs, insurance, etc.
Chapter 1. INTRODUCTION The CRS-100 1:1 Redundancy Switch (Figure 1-1) is a companion product for use with Comtech EF Data CDM-500, CDM-550 or CDM-550T Modems. Its purpose is to continuously monitor a pair of modems (in a redundant configuration) so that, in the event of an equipment failure (or an undesired traffic condition), the unit will automatically switch data and IF signals from the failed unit to the Standby unit.
CRS-100 1:1 Redundancy Switch Introduction Revision 2 MN/CRS100.IOM Accordingly, a 1:1 system comprises an Online Modem, a Standby Modem, and the CRS-100 Switch. WARNING Note that the CRS-100 has been designed specifically as an accessory product for the Comtech EF Data CDM-500, CDM-550 and CDM-550T Modems, and should not be used with any other manufacturer’s equipment.
Chapter 2. INSTALLATION 2.1 Unpacking Inspect shipping containers for damage. If shipping containers are damaged, they should be kept until the contents of the shipment have been carefully inspected and checked for normal operation. Remove the packing list from the outside of the shipping carton. Open the carton and remove the contents, checking the contents against the packing list. Verify completeness of the shipment and that the unit functions correctly.
CRS-100 1:1 Redundancy Switch Introduction 2.3 Revision 2 MN/CRS100.IOM Configuration There are only two configuration switches to set, which are located on the left-hand side of the unit, when viewed from the front. These two switches control the conditions which initiate an automatic switchover. Consult the following sections on how to set these switches. 2.4 Connect External Cables Figure 2-1 shows how to connect a pair of modems together with the CRS-100.
CRS-100 1:1 Redundancy Switch Introduction Revision 2 MN/CRS100.IOM Figure 2-1.
CRS-100 1:1 Redundancy Switch Introduction Revision 2 MN/CRS100.
CRS-100 1:1 Redundancy Switch Introduction 2.5 Revision 2 MN/CRS100.IOM CRS-100/CIC-50 Cabling Details Figure 2-2 shows how to connect the CIC-50 T1/E1 Interface Converter to the installation.
CRS-100 1:1 Redundancy Switch Introduction Revision 2 MN/CRS100.
Chapter 3. PHYSICAL DESCRIPTION The CRS-100 is constructed as a free-standing module measuring 1.7H x 5.7W x 4.1D inches (4.3H x 14.5W x 10.4D cm), not including connectors. 3.1 Front Panel On the front panel (Figure 3-1) of the unit is the main Data Interface connector, a 25 pin ‘D’ type female, and the main Tx and Rx IF connectors, which are BNC female. The pin connections for the Data Interface connector are shown in Section 6. Also on the front panel are two LEDs, marked ‘A Online’ and ‘B Online’.
CRS-100 1:1 Redundancy Switch 3.3 Side Panel - Right Side On the side panel (Figure 3-1) to the right are the two Tx IF ports, ‘A’ and ‘B’, which are BNC female. Connection is made to the pair of Modems using Comtech EF Data P/N CA/BNC 75 OHM ( 75Ω applications) or Comtech EF Data P/N CA/BNC 50 OHM ( 50Ω applications). Figure 3-1. CRS-100 – Side Panels 3–2 MN/CRS100.
CRS-100 1:1 Redundancy Switch \Physical Description 3.4 Revision 2 MN/CRS100.IOM Side Panel - Left Side On the side panel (Figure 3-1) to the left are the two Receive IF ports, ‘A’ and ‘B’, which are both BNC female. Connection is made to the pair of Modems using Comtech EF Data P/N CA/BNC 75 OHM ( 75 Ωapplications) or Comtech EF Data P/N CA/BNC 50 OHM ( 50 Ω applications).
CRS-100 1:1 Redundancy Switch This page has been intentionally left blank. 3–4 MN/CRS100.
Chapter 4. FUNCTIONAL DESCRIPTION The CRS-100 connects to two modems, an Online unit, and a Standby unit, monitors the fault status of these two units, and controls the routing of data and IF signals to and from the two units. In the case of an equipment failure, switching automatically takes place to protect the traffic circuit. At the heart of the CRS-100 is a Controller State Machine, which is responsible for fault monitoring and control of switching functions. It is implemented in a CPLD.
Functional Description CRS-100 1:1 Redundancy Switch hence lose approximately 3.5 dB in output power level) the CRS-100 does not introduce any attenuation of output signal level. The Rx IF signal is fed to both units simultaneously, using an internal power divider. This does introduce a loss of approximately 3.5 dB, but given the wide dynamic range of the demodulator in both the CDM-500 and the CDM-550, this is not considered to be a problem.
Chapter 5. CONNECTOR PINOUTS Table 5-1. Data Connector - 25 Pin ‘D’ Type Female Pin Generic Signal description Direction EIA-422/ EIA 530 V.
Connector Pinouts CRS-100 1:1 Redundancy Switch For correct operation of the CRS-100, the Modems must have the following Firmware versions installed: IMPORTANT CDM-500 - Version 1.18 or later CDM-550 - Version 1.10 or later CDM-550T - Version 1.04 or later If the modems do not meet this requirement, please contact the factory to arrange for a free upgrade to be sent to you. 5–2 Rev. 1.
Chapter 6. OPERATION 6.1 AUTOMATIC OPERATION Having connected the cables in accordance with the instructions and diagram in Section 3.4, the User is now ready to put the system into operational use. Before proceeding, the User should check that the Auxiliary Serial link between the two units is functioning correctly. From the front panel of the Online unit, access the main menu, then select INFO. 6.1.
CRS-100 1:1 Redundancy Switch Operation 6.1.2 Revision 2 MN/CRS100.IOM (INFO) MISC (Miscellaneous information) MISC: IF-LOOP 50 OHMS 1:1 LINK=ACTIVE ONLINE On the bottom line, the screen should show that the 1:1 link is active. If it does not, then check that the cable is correctly installed before continuing. Comtech EF Data recommends that the User decide upon which condition is desired to initiate a switchover, and to correctly configure the two switches on the left side of the CRS-100.
CRS-100 1:1 Redundancy Switch Operation 6.1.3 Revision 2 MN/CRS100.IOM (CONFIG) MASK (Alarm mask) ALARM MASK: AGC RX-AIS BUF-SLIP Eb/No TX-AIS The user is prompted to select AGC, Eb/No, RX-AIS, BUF-SLIP, or TX-AIS, using the [←] [→] arrow keys, then to press [ENTER]. Following the selection of the alarm to be masked, the User is then presented with a submenu, where the choice between ‘ACTIVE’ and ‘MASKED’ is made.
CRS-100 1:1 Redundancy Switch Operation 6.2 Revision 2 MN/CRS100.IOM Manual Operation There are two ways to force a manual switchover in a 1:1 system. First, from the front panel of the Online unit, select the Utility screen: 6.2.1 UTIL (Utility) UTILITY: SET-RTC DISPLAY MAN-1:1 RECENTER-BUF ID The user should select MAN-1:1, then press [ENTER]. 6.2.
Chapter 7. SUMMARY OF SPECIFICATIONS Equipment Type Modems Supported Operating Modes Architecture Switch Conditions Fault detection time Switchover time Data Interface Types Pinout IF Switching /Splitting IF Impedance IF Connectors MN-CRS100.
CRS-100 1:1 Redundancy Switch Summary Of Specifications IF Frequency range Weight Dimensions Power requirements Approvals Revision 2 MN-CRS100.IOM 52 - 176 MHZ (works with both 70 and 140 MHZ Modem IF options) 1.1 lbs (0.5 kg) 1.7H x 5.7W x 4.1D inches (4.3H x 14.3W x 10.4D cm) (Excluding connectors) 3.2 Watts maximum + 12 volts DC @ 160 mA (max) -12 volts DC @ 100 mA (max) (Power is supplied by the Online and Standby Modems, and the unit current shares when both an ‘A’ and ‘B’ unit are present.
METRIC CONVERSIONS Units of Length Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter 1 centimeter — 0.3937 0.03281 0.01094 6.214 x 10-6 0.01 — — 1 inch 2.540 — 0.08333 0.2778 1.578 x 10-5 0.254 — 25.4 1 foot 30.480 12.0 — 0.3333 1.893 x 10-4 0.3048 — — 1 yard 91.44 36.0 3.0 — 5.679 x 10-4 0.9144 — — 1 meter 100.0 39.37 3.281 1.094 6.214 x 10-4 — — — 1 mile 1.609 x 105 6.336 x 104 5.280 x 103 1.760 x 103 — 1.609 x 103 1.
2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 • 333 • 2200 PHONE 480 • 333 • 2161 FAX
