DTXPRO-1.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL TABLE OF CONTENTS TABLE OF CONTENTS SECTION I --- SAFETY NOTICES…………………………………………………………………..… I-1 SECTION II --- TRANSMITTER SPECIFICATIONS ……………...…………………………..…… II-1 SECTION III--- TRANSMITTER INSTALLATION ………………………………………………… III-1 SECTION IV --- TRANSMITTER TURN-ON PROCEDURE……………………….…...... IV-1 SECTION V --- THEORY OF OPERATION A. INTRODUCTION……………………………………………………………………………….. V-2 B.
SECTION I SAFETY NOTICES
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL I. 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. II – TRANSMITTER SPECIFICATIONS DTXPRO-1.2KU OPERATING AND SERVICE MANUAL II – TRANSMITTER SPECIFICATIONS OPERATING Input Connector………………………… ASI or SMPTE310M Transport Stream Data Rate…………... 75 Ohm BNC External GPS Clock Input……………… 19,390 kbps Power Output…………………………… Optional RF Output Impedance…………………. 800 to 1.2 KW AVG POWER RF Output Connector………………….. 50 ohms Frequency Range ……………………...
Section III Transmitter Installation
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL III – TRANSMITTER INSTALLATION III. TRANSMITTER INSTALLATION To ensure long and reliable trouble-free service from the DTXPRO-1.2KU transmitter the following steps for installation are recommended: 1. MECHANICAL INSTALLATION: The DTXPRO-1.2KU was 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.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL III – TRANSMITTER INSTALLATION III. TRANSMITTER INSTALLATION (Continued) 4. ANTENNA CONNECTION: The transmitter is equipped with a 1 5/8" EIA flange connector located at the top of the rack. The RF ATSC Compliant Mask Filter and output Directional Coupler(s) are provided with the transmitter and are to be located and mounted at the customer discretion.
SECTION IV Transmitter Turn-On Procedure
PINEAPPLE TECHNOLOGY, INC. IV– TRANSMITTER TURN-ON PROCEDURE DTXPRO-1.2KU OPERATING AND SERVICE MANUAL IV --- TRANSMITTER TURN-ON PROCEDURE Before applying AC Power to the transmitter for initial turn-on and check out, the installation should be approved by a qualified broadcast engineer. The turn-on procedure that follows is recommended by Pineapple Technology, Inc., engineering staff: 1. Check transmitter load or antenna for proper installation and connection to the transmitter. 2.
PINEAPPLE TECHNOLOGY, INC. IV– TRANSMITTER TURN-ON PROCEDURE DTXPRO-1.2KU OPERATING AND SERVICE MANUAL lV --- TRANSMITTER TURN-ON PROCEDURE (Continued) 13. Using the power control switches increase power to 50%. Do not exceed this level till the reflected power from the load or antenna is checked. This can be done by selecting the REFLECTED POWER DISPLAY (RFLD). Reflected power should not exceed 5%. 14.
SECTION V Theory of Operation
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL V. THEORY OF OPERATION V. THEORY OF OPERATION A. INTRODUCTION The DTXPRO-1.2KU transmitter was 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. The construction of the DTXPRO-1.2KU is BASIC and MODULAR with most subassemblies field replaceable.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL V. THEORY OF OPERATION V -- THEORY OF OPERATION (Continued) C. PS6KW 6 KW POWER SUPPLY ASSEMBLY FOR 50 VDC OPERATION The DTXPRO-1.2KU transmitter is designed with over 6 KW of DC power. To achieve this level, the power supply in each transmitter rack is made up of three (3) AC2050 power modules mounted into one (1) main frame assembly, AC2009, which is capable of managing all three (3) 2 KW modules.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL V. THEORY OF OPERATION V -- THEORY OF OPERATION (Continued) D. ADP500 PERFORMANCE MONITOR AND PAS SELECTOR SWITCH (Continued) 3. An RF MONITOR port (BNC) is available to connect a spectrum analyzer for monitoring the output signal. 4. METER SELECTION SWITCHES – The rotary switches on the PAS are used to select the appropriate PA module (PA1K) for performance display on the ADP500.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL V. THEORY OF OPERATION V. THEORY OF OPERATION (Continued) E. DXDPRO-10U DIGITAL MODULATOR AND EXCITTER The heart of any TV Transmitter is the Modulator. This equipment receives the ASI or SMPTE digital stream from the program source. The modulator generates the ATSC/8VSB signal and up converts it to the desired Television Channel. The modulator performs several additional important function as listed below; 1.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL V. THEORY OF OPERATION V -- THEORY OF OPERATION (Continued) G. DRIVER AND ALC CIRCUITS ARE INCLUDED IN THE DXDPRO-10U Modulator/Driver (Continued) 2. Command Functions - The three front panel “NO” (momentary) push buttons – POWER UP, POWER DOWN, SET/RESET – can be remotely operated by a momentary relay closure to ground. Each operation is internally pulled up to 5 VDC through a 10K resistor.
PINEAPPLE TECHNOLOGY, INC. DTXPRO-1.2KU OPERATING AND SERVICE MANUAL V. THEORY OF OPERATION V -- THEORY OF OPERATION (Continued) L. BPL5KU-KK HARMONIC FILTER This harmonic (also sometimes called Low Pass) filter is inserted at the output of the ATSC mask filter and before the transmission line to the antenna to provide necessary filtering of channel harmonics to meet FCC Rules.
SECTION VI Block Diagrams Photos And Parts List
VII. BLOCK DIAGRAMS AND PARTS LISTS Section VI includes a DTXPRO-1.2KU block diagram and block diagrams, parts lists, and/or photos of many of the components in the DXTPRO1.2KU.
VI. –DTXPRO-1.
DTXPRO-1.
VI – BLOCK DIAGRAMS AND PARTS LIST The following subassemblies make up the DTXPRO-1.2KU: 1. 2. 3. 4. 5. 6. DC5KC-1 DIRECTIONAL COUPLER BLP5KU-KK HARMONIC FILTER BPUD2.5K6S158-J MASK FILTER TR-500 TERMINATION UCH2KU-3 HYBRID COMBINER MULTICOUPLER MFA2PA 6A. PA1KU-50 6B. 1A0035 6. ADP500 MONITOR 7. PAS6 PA SELECTOR 8. USH3C SPLITTER 9. DXDPRO-10U MODULATOR 10. ACDIS2 11. PAS6KW 12. PA FANS 13. RACK FAN 14.
VI. DTXPRO-1.2KU FILTER AND COUPLER LAYOUT (Includes: DC5KC-1 Directional Coupler, BLP5KU-KK Harmonic Filter, BPUD2.
VI.
