TECHNICAL SERVICE MANUAL TRANSMITTER GENERAL INFORMATION LARCAN INC. 228 AMBASSADOR DRIVE MISSISSAUGA, ONTARIO CANADA L5T 2J2 PHONE: (905) 564-9222 FAX: (905) 564-9244 EMAIL: techservices@larcan.
PUB07-07 1 GENERAL INFORMATION INTRODUCTION.............................................................................................................................................................. 1 1.1 1.2 1.3 PRODUCTION CHANGES ................................................................................................................................................ 1 DISCLAIMER ....................................................................................................................
GENERAL INFORMATION 1 INTRODUCTION The transmitter technical details are described in this manual. The Manual is provided on this CD-ROM in PDF format. The complexity of the equipment and the amount of information requires this information to be presented in several publications. These publications are gathered into a single Volume to comprise the transmitter manual. The list of publications and their revision numbers is provided in separate PDF file TSM20-xxxG1 file.
GENERAL INFORMATION 2 PREFIX NUMBERS Prefix Numbers assist in identifying assemblies and subassemblies by their physical location in the overall transmitter model assembly. Each transmitter model has an associated Prefix List, which provides an index of Prefix Numbers identifying the Sub-Assemblies in each Cabinet and in large assemblies. Every sub-assembly of the transmitter on its own is identified by a nine-digit assembly number (e.g., 21B1234G1).
GENERAL INFORMATION Use of Prefix Numbers in Documentation a) Interconnect Diagrams or Running Lists, in which only one Large Assembly is detailed (e.g., Cabinet Assembly). Prefix numbers are used as follows; For example: 11-J1 (Subassembly #11- Connector J1) b) Interconnect Diagrams or Running Lists for a Transmitter indicating interconnections between Large Assemblies (Cabinet-to-Cabinet or Cabinet-to-External Components). Prefix numbers are preceded by Major Assembly prefix and “–“.
GENERAL INFORMATION 3 LARCAN PARTS, ASSEMBLIES, ASSEMBLY DRAWINGS AND SCHEMATIC NUMBERS 3.1 VENDOR STANDARD PART NUMBERS Vendor or original manufacturer part numbers are indicated for most components. 3.2 LARCAN NUMBERS FOR PARTS, ASSEMBLIES AND DOCUMENTATION An index of LARCAN specified number are used to define and specify the following; parts made by a manufacturer to LARCAN specification, an assembled unit or “group” such as a PC Board or completed cabinet.
GENERAL INFORMATION 77 = 1/2W resistance (5, 10% tol.) 78 = 1W nnn - first digits of 79 = 2W resistance (1% tol.) J =5% H =1% x - x10 multiplier For values between 1Ω and 10Ω, a letter “R” will appear in the resistance value to indicate the decimal place. For vendor leaded resistors a generic drawing describing basic specifications, but having many “parts”, will often be used. “3R152P5R6J” is 5.6Ω, 1/4W, ±5% “3R152P470K” is 47Ω, 1/4W, ±10% “3R152P1022H” is 10.
GENERAL INFORMATION SIZE LxW 0603=1.6x08mm 0805=2x1.25mm 1206=3.2x1.6mm DIELECTRIC MATERIAL CG = NPO 2R = X7R 2F = Y5V * CAPACITANCE VALUE (in picofarads) nn =first 2 digits x =multiplier as shown below 8=x0.01 9=x0.1 0=x1 1=x10 2=x100 3=x1000 4=x10000 5=x100000 2E = Z5U * TOLERANCE VOLTAGE RATING B=0.10pF C=0.25pF D=0.50pF 7=16VDC 8=25VDC 9=50 VDC F=1% G=2% J=5% K=10% M=20% 0=100VDC B=200VDC D=500VDC TERMINATION B=Ni/Sn A=Ag/Pd C=Ni/Sn-Pb * (infrequent use) e.g,.
GENERAL INFORMATION 4 SAFETY PRECAUTIONS This section has been written to provide general guidance and information for the operation, maintenance, and service personnel who are familiar with the hazards of working with high-powered electronic circuits. This manual does not detail all of the safety precautions which should be observed when servicing this or any other electronic equipment.
GENERAL INFORMATION Under no circumstances should any person reach within the cabinets for the purpose of servicing or adjusting the equipment without first disconnecting the AC power or without the immediate presence of another person capable of rendering aid. The “buddy” system is encouraged for transmitter work. Rule #2 DO NOT TAMPER WITH INTERLOCKS OR SAFETY SHIELDS Under normal circumstances, no safety shield should be removed.
GENERAL INFORMATION lockout/tagout procedure. You might want to include your tower contractor's rigging crew in the list of people who are allowed to use tags and padlocks. As an alternative, Dielectric™ makes a transmission line lockout switch that is intended for riggers to turn off and lock out any RF before climbing over the antenna to replace light bulbs, etc. Proper grounding is vital. See the Installation section of this manual.
GENERAL INFORMATION APPENDIX A ABBREVIATIONS USED IN LARCAN INC. DOCUMENTS Following is a list of abbreviations used on Larcan Inc. drawings, part lists, manuals etc.
GENERAL INFORMATION 8VSB 8 LEVEL VSB DAC DIGITAL ANALOG CONVERTER A AMPERE, ASSEMBLY dB DECIBEL AC ALTERNATING CURRENT DC DIRECT CURRENT AGC AUTOMATIC GAIN CONTROL DDS DIRECT DIGITAL SYNTHESIS ALC AUTOMATIC LEVEL CONTROL DEC DECIMAL ALT ALTERNATE, ALTITUDE DEG DEGREE AMP AMPLIFIER DET DETECTOR ANT ANTENNA DEV DEVIATION APL AVERAGE PICTURE LEVEL DG DIFFERENTIAL GAIN ASSY ASSEMBLY DIA DIAGRAM ASS'Y ASSEMBLY DIFF DIFFERENTIAL ASYNC ASYNCHRONOUS DIP DUAL IN LINE PA
GENERAL INFORMATION HTTP HYPERTEXT TRANSFER PROTOCOL MTR METER HV HIGH VOLTAGE MUX MULTIPLEXER Hz HERTZ MXR MIXER I CURRENT, INCIDENT, INDUCTOR N NEUTRAL I/C INTERCONNECTION N/A NOT APPLICABLE I/F INTERFACE nano/ n 1.
GENERAL INFORMATION REM REMOTE Tera/ T 1.
