Microwave Radio DS-2 Operator'S Manual Download

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Operator’s Guide

DS-2

IF Diversity Switch

Document: 400462-1
Revision A
March 2001

Table of Contents

Section 1 -

System Overview

Section 2 -

System Installation

Summary of Contents for DS-2

Page 1: ...Operator s Guide DS 2 IF Diversity Switch Document 400462 1 Revision A March 2001 Table of Contents Section 1 System Overview Section 2 System Installation ...

Page 2: ... to any articles disclosed therein except to the extent rights are expressly granted to others The foregoing does not apply to vendor proprietary parts To allow for the introduction of design improvements specifications are subject to change without notice 2001 Microwave Radio Communications Printed in the U S A March 2001 Revision Date A March 2001 Microwave Radio Communications 101 Billerica Ave...

Page 3: ...g pin This plug fits into a standard grounded power outlet If you are unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the grounded plug Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by other equipment items Pay particular attention to cords at pl...

Page 4: ...Notes ...

Page 5: ...tion Troubleshoot common system faults For commonly used abbreviations and acronyms see the Glossary on page vi Related Documents FLH DAR Operator s Guide Instructions for installing and calibrating the FLH DAR transmitter and receiver Organization This manual is divided into the following sections and appendices Section 1 System Overview Describes the operating specifications and theory of operat...

Page 6: ...a BB Baseband BER Bit Error Rate BNC Bayonet lock coaxial connector BPF Band Pass Filter BPS Bits per second CCITT International Telegraph and Telephone Consultative Committee a telecommunications standardizing committee of the ITU Composite A band or grouping of frequencies and or subcarriers including video occupied by the signal in a radio transmission system Same as baseband signal dB Decibel ...

Page 7: ...dentification IF Intermediate Frequency IRE 1 Institute of Radio Engineers an international professional radio engineering association that establishes various standards 2 A unit of measurement established by the IRE in which 1 IRE Unit 00714 volts peak to peak Vp p and 140 IRE units equals 1 Vp p Kbps Kilobits per second KHz Kilo 1 000 cycles per second LCD Liquid Crystal Display Lcl Local LED Li...

Page 8: ...on in only one direction STDBY Standby Subcarrier An electromagnetic signal that is used as a medium for placing an information channel above another information channel SYNTH Synthesizer T1 1 544 Mbps traffic rate T3 45 Mbps traffic rate Tx Transmitter VCO Voltage Controlled Oscillator VCXO Voltage Controlled Crystal Oscillator VDC Volts Direct Current VF Voice Frequency Video A term pertaining t...

Page 9: ... 1 9 2 Pin Assignments P1 1 4 Table 2 2 Pin Assignments Connector P1 1 4 1 9 3 Mechanical 1 4 Figure 2 3 DS2 Diversity Switch Rear Panel 1 4 Table 2 3 Parts List 1 5 Figure 2 4 Schematic 1 7 2 System Installation 2 1 2 1 Unpacking and Handling 2 1 2 1 1 Inspection 2 1 2 1 2 Damage in Shipment 2 1 2 2 Installation Prerequisites 2 2 Figure 2 1 Rack Clearances Top View 2 2 2 2 1 Grounding the Equipme...

Page 10: ...x IF Diversity Switch Operator s Guide 400462 1 Rev A ...

Page 11: ...o U1 The output of each amplifier passes through a RC filter to reduce noise on the analog input lines Strapping points are provided to allow for cases where the AGC voltage is positive going Zener diodes D6 and D5 protect U1 from voltages outside the U1 range 1 4 IF Amplifier 70 MHz IF inputs are applied to J1 and J2 Parallel IF outputs are J3 and J4 U2 U11 U12 are GaAs monolithic switches contro...

Page 12: ... that receiver is selected and the corresponding lamp illuminated If the switch is in the center Auto the unit looks first at the remote lines and selects which receiver is desired if any The front panel switch over rides any remote selection The remote selections through P1 takes precedence over the Auto Mode If there are no switch requests the processor reads the AGC level of the A and B receive...

Page 13: ...panel switch remove the prime power and try again Insure the AGC voltage is in the correct range Verify the power supply levels are as stated 25 V The level at the input of U3 for a particular analog value should be the same as at P1 with the difference in absolute value no more than 25 mv If the absolute voltage difference is greater the associated op amp is suspect The IF switch bandwidth is wid...

Page 14: ...Stream DS2V4T MIK 1 9 2 Pin Assignments P1 Table 2 2 Pin Assignments Connector P1 Note Connections to P1 should be with shielded twisted pairs in areas with high levels of RFI such as TV stations FM broadcasting stations or radar 1 9 3 Mechanical Size 19 w 8 5 d 1 75 h Figure 2 3 DS2 Diversity Switch Rear Panel Pin Description 1 Chassis ground Power com 2 V in 1 either 24 V or 48 V depending on mo...

Page 15: ...31 100K RES 100K 1 1 4W NA55 1003F CORNING 17 1 RN1 10KSIP RES NET 7X10K EXB F8E103G PANASONIC 18 3 C2 C6 3 3 18PF CAP VAR 3 18PF GKU18000 Spraque GOODMAN 19 4 C7 C8 C10 C12 1000PF CAP 01 10 CER ECQ V1H102JZ PANASONIC 20 7 C1 C3 C4 C5 C11 C14 C 15 0 1 CAP 1UF 10 CER CK05BX104K AVX 21 1 C13 1 35V CAP 1UF 10 35V 199D105X9035 SPRAGUE 22 1 Q1 2N4403 TRANS SW PNP 2N4403 GE 23 1 U1 CM1232 IC UP MONITOR ...

Page 16: ... 42 3 K1 K2 K3 HE721C0500 SPDT 5V DIP HE721C0500 HAMLIN 43 1 P1 747238 4 CON PLUG 25POS 747238 4 ÅÅÅÅAMP 44 1 CHASSIS RACK MNT DON ENGR 45 4 SPACER 4X1 2 AL KEYSTONE 46 4 SCREW 5 16 FH PHIL 47 1 FRONT PANEL 48 2 MOUNTING EAR 49 1 ADHESIVE LABEL 50 1 ICO 406 S8A T SOCKET 40 PIN DIP 51 1 ICO 163 S8A T SOCKET 16 PIN DIP 52 3 ICO 083 S8A T SOCKET 8 PIN DIP 53 2 FUSE CLIP 54 2 SCREW LOCK FEM 55 1 BLANK...

Page 17: ...igure 2 4 Schematic MICROWAVE RADIO COMMUNICATIONS DS 2 IF DIVERSITY SWITCH DWG DS 2 REV 6 SHEET 1 OF 1 9 11 99 ...

Page 18: ...Specifications System Overview 1 8 IF Diversity Switch Operator s Guide 400462 1 Rev A ...

Page 19: ...y packing material until the mechanical inspection has been satisfactorily completed This material must be available in the event that a damage claim needs to be filed with the shipping carrier 2 1 1 Inspection Inspect the equipment for any shipping damage Check that the equipment is clean and that no cables or connectors are broken damaged or loose Note At the time of inspection DO NOT make any a...

Page 20: ...llow a minimum of 36 inches of clearance in front of the equipment rack 2 Avoid direct heat to the unit If unavoidable use deflector plates or install the unit in a climate controlled environment 3 Locate the equipment to allow for an adequate number of AC power outlets for test equipment and power tools 4 Check that the rack mounts are sufficiently rigid to support the rack and equipment 5 Elimin...

Page 21: ... Caution Grounding the equipment rack is mandatory 2 3 Rack Installation The unit mounts within a standard 19 inch equipment rack The unit occupies a height of 1 rack units 1RU The unit attaches to the equipment rack using four 12 24 mounting screws See Figure 2 2 for the correct mounting hole locations Figure 2 2 Rack Installation For detailed information on assembling and installing a standard e...

Page 22: ...or marking the floor location drilling holes for anchoring the hardware Figure 2 3 However if the rack is available when these holes are drilled it is recommended that the rack base itself be used as a template Figure 2 3 Equipment Rack Template Step 4 Hole size is determined by the type of anchor to be used On concrete floors use the following hardware Bolts 3 8 16 x 2 Washers 3 8 Lock and flat 1...

Page 23: ...Secure the rack to the adjacent racks and existing superstructure where applicable 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 RACK_FR 84 00 MOUNTING HOLES ...

Page 24: ...Equipment Rack Installation System Installation 2 6 DS 2 IF Diversity Switch Operator s Guide 400462 1 Rev A ...

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