LTX100U/VH/VL TRANSMITTERS INSTRUCTION MANUAL PINEAPPLE TECHNOLOGY, INC
PINEAPPLE TECHNOLOGY, INC. LTX100U/VH/VL Operating and Service Manual TABLE OF CONTENTS Section l --- SAFETY NOTICES ………………………………………………………………………… 2 ** READ THIS SECTION BEFORE INSTALLATON ** Secton ll --- TRANSMITTER SPECIFICATIONS …………………...………………………………… 3 Section lll --- TRANSMITTER INSTALLATION ……………………………………………………… 5 Section lV --- TRANSMITTER TURN-ON ……………………………………………………………… 6 Section V --- THEORY OF OPERATION A. Introduction ……………………………………………………………………………… B.
Section I Safety Notices
PINEAPPLE TECHNOLOGY, INC. LTX100U/VH/VL Operating and Service Manual l --- SAFETY NOTICES l ---SAFETY NOTICES ** READ THIS SECTION BEFORE INSTALLATION ** SEVERE ELECTRICAL SHOCK OR BURNS MAY OCCUR IF THIS EQUIPMENT IS USED IMPROPERLY. NEVER WORK ON THIS EQUIPMENT ALONE. ALWAYS HAVE ANOTHER PERSON PRESENT WHILE WORKING ON ELECTRICAL CIRCUITS OR MOVING EQUIPMENT. COMMUNICATIONS TO EMERGENCY SERVICES SHOULD BE AVAILABLE AT ALL TIMES.
Section II Transmitter Specifications
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual II – TRANSMITTER SPECIFICATIONS II – LTX100U/VL/VH SPECIFICATIONS OPERATING Power Output ………………………… 100 Watts P-Sync 5 Watts Aural RF Output Impedance………………… 50 ohms Frequency Range LTX100U……………………...470 – 806 MHz LTX100VL…………………….CH 2 – CH 6 LTX100VH……………….……CH7 – CH13 Frequency Stability…………………… 1 PPM or better Harmonic and Spurious………………...
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual II – TRANSMITTER SPECIFICATIONS AUDIO PERFORMANCE Audio Response…………….…………. Meets FCC Pre-emphasis curve Distortion…………………………………….< 1% THD FM Noise…………………………............... < 50 dB or better AM Noise……………………………………< 40 dB or better AM Synchronous Noise……………………. < 40 dB typical GENERAL Operating Temperature…………………….. -10 to +35 Degrees Celsius Ambient +14 to +95 Degrees Fahrenheit Ambient Altitude……………………………………..
Section III Transmitter Installation
PINEAPPLE TECHNOLOGY, INC. LTX100U/LV/LH Operating and Service Manual lll -- TRANSMITTER INSTALLATION lll -- TRANSMITTER INSTALLATION To ensure long and reliable trouble-free service from the LTX100U/LV/LH transmitters the following steps for installation are recommended: 1. MECHANICAL INSTALLATION: The LTX100U/LV/LH transmitters were designed to be installed in a building protected from the weather. The building should have a hard-surface floor such as concrete with a moisture barrier.
Section IV Transmitter Turn-On
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual lV -- TRANSMITTER TURN-ON PROCEDURE lV --- TRANSMITTER TURN-ON PROCEDURE (Page 1 of 2) See the previous section on installation before proceeding with this section. Improper installation of the transmitter can cause serious damage to the equipment or operating personnel and may void manufacturers warranty. Initial turn on and check out is very important for the broadcast engineer to learn how to setup and operate the transmitter.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual lV -- TRANSMITTER TURN-ON PROCEDURE lV --- TRANSMITTER TURN-ON PROCEDURE (Page 2 of 2) Note: Allow the LTX100U/VL/VH to warm up for at least one (1) hour before making the final adjustment. If transmitter is not warmed up, the output power will require re-adjustment to proper level when it is warm. 8. Select the FWD Power setting on the rotary switch associated with the front panel meter on the LTX Mainframe assembly.
Section V Theory of Operation
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual V -- THEORY OF OPERATION V --- THEORY OF OPERATION (Page 1 of 2) A. INTRODUCTION The LTX100U/VL/VH series transmitters were designed to meet or exceed all FCC applicable specifications for TV broadcast equipment. Special attention was given to the selection of sub-assemblies and components to achieve maximum reliability and minimum down time.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual V -- THEORY OF OPERATION V. THEORY OF OPERATION (CONTINUED) (Page 2 of 2) D. BAND PASS FILTERS BPU150N - Used in the LTX100U UHF Transmitter BPVH300N - Used in the LTX100VH High VHF Band (Ch 7 - 13) Transmitter BPVL200N - Used in the LTC100VL High VHF Band (Ch 2 - 6) Transmitter These Band Pass filters were designed to meet FCC Certification requirements with minimum loss of RF Power.
Section VI Schematic and Parts List
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual A.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual A.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual A.
Page 13 110 VAC Audio In Audio AC Inlet Video In Video MA1000 Modulator BPU150N used for LTX100U BPVH300N used for LTX100VH BPVL200N used for LTX100VL Band Pass Filters AC Inlet RF Input RF Output Mon LTX100( ) Mainframe Assembly RF Probe DB9 Remote Interface A SIZE SCALE 1:1 FSCM NO. DWG NO. LTX100U/VH/VL UHF Transmitter SHEET Pineapple Technology, Inc.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual A.
SECTION VI - SCHEMATIC AND PARTS LISTS SUB-SECTION A - LTX100U/LH/LV Internal View Pineapple Technology, Inc. Rocklin, CA LTX Mainframe UHF SIZE Page 15 SCALE FSCM NO. DWG NO.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual A.
SECTION VI - SCHEMATIC AND PARTS LISTS SUB-SECTION A - LTX100U/LH/LV Internal View Pineapple Technology, Inc. Rocklin, CA LTX Mainframe High VHF SIZE Page 17 SCALE FSCM NO. DWG NO.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VL/VH Operating and Service Manual A.
SECTION VI - SCHEMATIC AND PARTS LISTS SUB-SECTION A - LTX100U/LH/LV Internal View Pineapple Technology, Inc. Rocklin, CA LTX Mainframe Low VHF SIZE Page 19 SCALE FSCM NO. DWG NO.
Page 20 FWD Pwr P1 P2 P3 Gnd P4 Shutdown P5 P6 RFLD Pwr P7 ALC P8 +8 VDC P9 110 VAC RF DB9 VH250LD PC9513 Note1 PC9512 Note1 VL500A UDR10E UDR10E LTX100VH Ch 2 - 6 Ch 7 - 13 P/S PC9514 Note1 Direct’l Coupler LTX100VL PA PA U250LD Driver RF IN +DC Ch 14 - 69 UDR10E Channel 110 VAC AC Inlet PS1 P/S Driver M RF Deck LTX100U PA Fan 110VAC ON\OFF SW +DC RF IN M DC Output From RF Output Monitor Tap DC Metering and DC Monitoring 1A0035 Directional Coupler CAL ATT Pineapple Techno
SECTION VI - SCHEMATIC AND PARTS LISTS SUB-SECTION C - LTX100U/VH/VL No Serviceable Parts Pineapple Technology, Inc. Rocklin, CA BPU150 Band Pass Filter SIZE Page 21 SCALE FSCM NO. DWG NO.
SECTION VI - SCHEMATIC AND PARTS LISTS SUB-SECTION D - LTX100U/VH/VL No Serviceable Parts Pineapple Technology, Inc. Rocklin, CA SIZE Page 22 SCALE Low VHF Bandpass Filter CIRCUIT DIAGRAM FSCM NO. DWG NO.
Section VII Recommended Routine Maintenance
PINEAPPLE TECHNOLOGY, INC. LTX100U/LH/LV Operating and Service Manual VII -- ROUTINE MAINTENANCE VII --- ROUTINE MAINTENANCE Routine Maintenance on the transmitter is very simple and straight forward. PTI recommends the following steps to ensure long and eliable trouble-free service. SCHEDULE: DAILY OR WEEKLY SERVICE 1. Check output power level to ensure that the meter is reading in the GREEN. If the level has changed adjust the output level to 100% using the modulator output level adjust. 2.
Section VIII Adjustments and Tuning
PINEAPPLE TECHNOLOGY, INC. LTX100U/VH/VL Operating and Service Manual VIII -- ADJUSTMENTS AND TUNING VIII --- ADJUSTMENTS AND TUNING The LTX100U/VH/VL is a new series of analog transmitters offered by Pineapple Technology, Inc. The latest in LDMOS device and circuit technology are employed to ensure reliable and serviceable operation for many years. There are very few adjustments necessary to maintain full service condition.
Section IX Problem Solving & Troubleshooting
PINEAPPLE TECHNOLOGY, INC. LTX100U/VH/VL Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 1of 2) The LTX100U/VH/VL is a "MODULAR ASSEMBLY" where most of the sub-assemblies can be removed and or replaced as necessary as necessary to maintain full service. To service this transmitter, it is best to become familiar with the various sub-assemblies by reviewing the transmitter block diagram and it's associated subs shown in the introduction.
PINEAPPLE TECHNOLOGY, INC. LTX100U/VH/VL Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 2of 2) TEMP FAULT RED indicates over temperature of PA or High VSWR If High VSWR, the light will cycle 10 seconds OFF and 2 seconds ON Put transmitter in STANDBY. Investigate antenna installation and connections, check transmission lines and connections. Check that transcoder up converter is on frequency.
Section X Warranty
PINEAPPLE TECHNOLOGY, INC. LTX100U/VH/VL Operating and Service Manual X -- WARRANTY X -- WARRANTY The WARRANTY provided by Pineapple Technology, Inc. (PTI) on this transmitter is detailed below. It should be noted that some of the equipment sub-systems have warranty coverage by the orginal manufacture that differs from the standard warranty provided by PTI Warrantydetails on equipment falling into this category may be found in the Manufacturers instruction manual provided with the transmitter.
