Summary of Contents for Microwave Radio DS-2
- Page 1 DS-2 IF Diversity Switch Table of Contents Section 1 - System Overview Section 2 - System Installation Document: 400462-1 Operator’s Guide Revision A March 2001...
- Page 2 PROPRIETARY NOTICE The information and design contained within this manual was originated by and is the property of Microwave Radio Communications. Microwave Radio Communications reserves all patent proprietary design, manufacturing, reproduction use, and sales rights thereto, and to any articles disclosed therein, except to the extent rights are expressly granted to others.
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Page 3: Important Safeguards
Attachments - Do not use attachments not 3. If the equipment does not operate normally by authorized by Microwave Radio following the operating instructions and adjusting Corporation. Using unauthorized only those controls that are covered by the operating attachments may create safety hazards or damage instructions. - Page 4 Notes...
- Page 5 Preface Purpose This manual explains how to install, operate, and configure the DS2 Diversity Switch. It also provides troubleshooting information in order to remedy common system faults. Audience This manual is intended for qualified installers and service technicians who need to perform the following tasks: •...
- Page 6 Preface Glossary This section describes commonly used acronyms and abbreviations used in telecommunication and those specific to Microwave Radio Communications. Term Definition ØLK Phase Lock. 1 Rack Unit height. A & C Alarm and Control. ADPCM Adaptive Differential Pulse Code Modulation.
- Page 7 Preface Term Definition Federal Communications Commission, the United State's communications regulatory agency. Forward Error Correction rate. FIFO First in, first out buffer. Finite Impulse Response. MRC's model designation for frequency modulated (FM) remodulating radio systems from 2 to 15 GHz. FLR2 is the 2 GHz band version; FLR4, the 4 GHz band version, etc.
- Page 8 Preface Term Definition Radio Frequency, any frequency of electromagnetic radiation or alternating currents in the range from 3 kHz to 300 GHz; as in RF Signal or RF Transmission. RF Level RF Power from the transmitter. Receiver. Software. Service Channel. Setpt Set point.
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Page 9: Table Of Contents
Table of Contents 1 System Overview ................1-1 Theory of Operation ................1-1 Power Supply Section .................1-1 Analog Buffer Amplifier ..............1-1 IF Amplifier ..................1-1 Driver ....................1-1 Processor .....................1-1 Operating Program ................1-2 Table 2-1 Switch Break Points ............ 1-2 Figure 2-1 DS2 Diversity Switch Front Panel......1-2 Trouble–shooting ................1-3 Figure 2-2 Front Panel Controls and Indicators ...... - Page 10 400462-1 Rev. A IF Diversity Switch Operator’s Guide...
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Page 11: System Overview
Section 1 System Overview Theory of Operation The DS–2 IF Diversity Switch is designed to select the best of two 70 MHz IF signals based upon AGC voltages applied to the A–D converter in U3 processor. Table 1-1 on page 1-2 lists the decision points included in the processor program. -
Page 12: Operating Program
System Overview Operating Program sets the processor clock to approximately 1 MHz. Inputs to U3 consist of the mode select switch SW1, analog voltage levels for AGC1 and AGC2 and remote lines to allow remote or manual selection of the receivers. An analog reference of 5 V is applied to the processor through filter R23, C13. -
Page 13: Trouble-Shooting
Trouble–shooting System Overview Trouble–shooting The power lamp must be on. If not check the prime power and F1. F1 in located inside the unit on the PC board. The fuse is a 1/2 amp standard blow type 3 AGC. The normal current for the DS–2 is less than 125 ma. -
Page 14: Specifications
System Overview Specifications Specifications 1.9.1 Electrical Range of AGC input (DAR/FLH)..0.0 to –5.0 V 10 ua Range of AGC input (TwinStream).. 0.0 to +5.0 V 10 ua Power Supply ......–20 to –32 VDC (125 ma) –38 to –52 VDC (125 ma) Input Range J1, J2 .. - Page 15 Specifications System Overview Table 2-3 Parts List Item Ref. Des. Description Part No. R8,R15,R21 24.9*RES. 24.9+/-1% 1/4W NA55-24R9F CORNING Not Used R13,R17 50, RES. POT. 50 1 TURN 3329H-1-500 BOURNS 100RES. 100+/-5% 1/4W 5043CX100R0 MEPCO R16,R24,R32,R33 150, RES. 150+/-5% 1/4W 5043CX150R0 MEPCO R4,R5...
- Page 16 System Overview Specifications Item Ref. Des. Description Part No. R8,R15,R21 24.9*RES. 24.9+/-1% 1/4W NA55-24R9F CORNING B-1,B+1,A-1,A+1,B,A 090, Terminal, .090 dia. 0-209-2-01 CONCORD J1,J2,J3,J4 31-5431, BNC CONN. PANEL 31-5431 AMPHENOL 1N755A, DIODE, ZENER 5.1V 1N755A/1N5236 1/2A, FUSE, 1/2 SLOBLO 313.500 LITTLEFUSE PLUG AC MALE, ENTRY 4302.0001 SCHURTER...
- Page 18 System Overview Specifications IF Diversity Switch Operator’s Guide 400462-1 Rev. A...
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Page 19: System Installation
Section 2 System Installation This section explains how to install the DS-2 IF Diversity Switch. The following topics are covered: • Unpacking and Handling • Installation Prerequisites • Rack Installation Unpacking and Handling Each unit is shipped assembled, wired, and factory tested. Each unit is packaged in appropriate shipping containers. -
Page 20: Installation Prerequisites
Example: leaking roofs, cracks in walls, or condensation from cold water pipes. Figure 2-1 Rack Clearances – Top View 18" CLEARANCE REAR STANDARD 19" RACK IF DIVERSITY FRONT 36" CLEARANCE DS2_SP DS-2 IF Diversity Switch Operator’s Guide 400462-1 Rev. A... -
Page 21: Grounding The Equipment Rack
Figure 2-2 Rack Installation MOUNTING SCREWS IF DIVERSITY SWITCH For detailed information on assembling and installing a standard equipment rack, see Section 2.4, Equipment Rack Installation on page 2-4. DS-2 IF Diversity Switch Operator’s 400462-1 Rev. A... -
Page 22: Equipment Rack Installation
- Anchors: 3/8” 16 x 2. - Caulking Anchors:, “Diamond” type 03060, Note: These anchors require 3/4” holes. On wood floors, use 3/8” x 1 - 1/2” lag bolts with lock and flat washers. DS-2 IF Diversity Switch Operator’s Guide 400462-1 Rev. A... - Page 23 Fasten the rack’s top braces to the superstructure using J-bolts. If there is not an existing superstructure, the top of the rack should be braced to a ceiling or wall. Figure 2-4 Equipment Rack – Front View MOUNTING HOLES 84.00" RACK_FR DS-2 IF Diversity Switch Operator’s 400462-1 Rev. A...
- Page 24 System Installation Equipment Rack Installation DS-2 IF Diversity Switch Operator’s Guide 400462-1 Rev. A...
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