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Related Manuals for Marti Electronics SRPT-40A
Summary of Contents for Marti Electronics SRPT-40A
- Page 1 MARTI ELECTRONICS RPU TRANSMITTER MODEL SRPT-40A...
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Page 2: Limited Warranty
1st printing, June 2001 No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system , or translated into any language, natural or computer, in any form or by any means, without the prior written permission of Marti Electronics. - Page 3 Information in this manual is subject to change without notice and does not represent a commitment on the part of Marti Electronics. Marti Electronics may make improvements and/or changes in this manual or in the product described herein at any time. This product could include technical inaccuracies or typographical errors.
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Page 4: Table Of Contents
Control & Connector Functions ………………………………………………………… 13 Operation .......................... Theory of Operation ......................25 Drawing 702-115 “SRPT-40A Functional Block Diagram”........Drawing 702-117 “SRPT-40A RF Systems & Control”..........29 Recommended Test Equipment ………………………………………………………… Tools For Alignment ……………………………………………………………………. 30 SRPT-40A Transmitter Factory Test Report ……………………………………………... -
Page 5: Introduction
The Marti Model SRPT-40A is a wide-band – high power RPU Transmitter designed to operate in the Remote Pick- Up Broadcast Service as defined in Part 74, Subpart D, of the FCC Rules and Regulations. The SRPT-40A is frequency synthesized up to 40 MHz wide and has an adjustable output power up to 50 watts maximum. Refer to the SPECIFICATIONS &... -
Page 6: Specifications & Ordering
Model SRPT-40A Remote Pick-Up Broadcast Transmitter SPECIFICATIONS & ORDERING Frequency Bands and See ORDERING INFORMATION below. Maximum Output Power: 12.5 or 10.0 KHz steps (user selectable) Frequency Resolution: RF Connector: Type N-Female -10 Cº to +45 Cº Operating Temp. Range:... -
Page 7: Ordering Information
Mobile Mounting kit. 585-141 12-15 VDC External Supply Cable 585-142 15-30 VDC External Supply Cable 585-139 12-15 VDC Mobile Repeat Cable, CR/AR-10 to SRPT-40A 585-140 15-30 VDC Mobile Repeat Cable, CR/AR-10 to SRPT-40A 585-143 Fixed Repeat Cable, CR/AR-10 to SRPT-40A 700-253... - Page 8 UNPACKING & INSPECTING This equipment was factory tested, inspected, packed, and delivered to the carrier with utmost care. Do not accept shipment from carrier which shows damage or shortage until the carrier’s agent endorses a statement of the irregularity on the face of the carrier’s receipt. Without documentary evidence, a claim cannot be filed.
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Page 9: Installation
Stationary Remote Broadcast Installation The basic stationary remote installation consists of the SRPT-40A transmitter, a 90-264 VAC power source, micro- phones and other audio program sources, and a portable antenna. Remotes using portable antennas inside buildings have very limited range (typically less than one mile). If greater range is needed, consider locating the transmitting antenna outside the building at a height necessary to provide a line-of-sight path to the receiving antenna. - Page 10 MICROPHONE, ANTENNA, OR OTHER CONNECTED EQUIPMENT) ARE STANDING ON WET GROUND OR CONCRETE. For locations where AC power is not available, the SRPT-40A can be powered from a fully charged automobile battery. The SRPT-40A draws eight (8) amps at 12.6 volts DC and at 50 Watts.
- Page 11 Mobile repeat operation is covered under Stationary Remote Broadcast Installation. Electrical connection for a 12-15 Volt supply is made through Mobile Repeat Cable No. 585-139. This cable is connected between the SRPT-40A transmitter and AR/CR-10 receiver. Power is obtained by connecting the fused RED wire to the 15-30 VDC battery or supply.
- Page 14 FAILURE TO USE A PROPERLY GROUNDED OUTLET COULD RESULT IN A SAFETY HAZARD OR FAULTY EQUIPMENT PERFORMANCE. For fixed automatic repeater operation, connect Cable No. 585-143 (FIG. 4.) between accessory connectors of the receiver and SRPT-40A transmitter. Connect receiving antenna to receiver J6 and transmit antenna to SRPT-40A ANTENNA connector.
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Page 15: Antennas
BASE STATION ANTENNA INSTALLATION CHECKLIST The following suggestions are offered to help those responsible for antenna installations avoid costly errors in assembly and adjustment. Marti Electronics assumes no responsibility for the installation and performance of antenna systems associated with its equipment. The following suggestions are not intended to be a complete step-by-step procedure, simply a listing of some of the most frequently reported errors in antenna system installation. - Page 16 System Grounding It is essential that the RPU antenna system be properly grounded for safety and proper operation. Antenna Installation and Adjustment The polarization of the transmit and receive antennas of the RPU system must be the same! This means that if the transmitting antenna is vertical, the receiving antenna must also be vertical.
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Page 17: Control & Connector Functions
External DC supply: The SRPT-40A can be powered externally by either a 12-15 Volt DC supply or a 15-30 Volt supply. If powered off a 12-15 Volt supply, connect three positive leads of the supply to pins 6, 7, and 14. Connect three negative leads of the supply to three of the four ground pins (pins 1, 8, 11, and 12). - Page 18 SUPPLY. AC LINE Switch, AC Receptacle & Fuse When the transmitter is not in use or if the SRPT-40A is to run off of an external supply, the AC LINE switch should be in the “OFF” position. When ready to use the SRPT-40A off of the AC line voltage, plug power cord into the AC Receptacle and switch the AC LINE switch to the “ON”...
- Page 19 ANTENNA Connector Connection of various antenna systems is covered under INSTALLATION and ANTENNAS. It is only necessary for the operator or announcer to see that the ANTENNA connector is tight and that the antenna is clear of objects which may affect its radiation efficiency. CAUTION &...
- Page 20 PA temperature is below 65 degrees C, it will turn off the HIGH TEMP LED and then enable the PA to transmit power. A HIGH TEMP alarm could be due to the fan malfunctioning, the SRPT-40A placed in a closed-in area with limited air circulation, or an experience of high VSWR.
- Page 21 TRANSMIT LED When the TRANSMIT/STANDBY switch is in the STANDBY position, the SRPT-40A will not transmit and the TRANSMIT LED will be off. When the TRANSMIT/STANDBY switch is in the TRANSMIT position but the SYNTHESIZER is not ready, the SRPT-40A will not transmit and the TRANSMIT LED will flash red.
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Page 22: Operation
DOING SO MAY DAMAGE THE INTERNAL SWITCHING SUPPLY OR THE EXTERNAL DC SUPPLY. AC Line Operation Position AC LINE switch to “OFF”, then plug SRPT-40A into a 90 - 264 volt, AC, grounded, 3-prong receptacle. WARNING THIS EQUIPMENT MUST BE OPERATED WITH A 3-PRONG, GROUNDED, 90-264 VOLT, AC... - Page 23 If using AC line, turn on SRPT-40A by turning on front panel AC LINE switch. If using 12-15 Volt or 15-30 Volt external DC supply, turn on SRPT-40A by turning on external DC supply. The front panel AC LINE switch has no control of external DC supply.
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Page 24: Inputting Audio
To change the frequency of the SRPT-40A, the S1 dip-switches on the Front Panel Control & Meter board (800- 378) behind the front panel (see the SRPT-40A Adjustment Locations) need to be set with switches 1 and 2 in the “ON”... - Page 25 450.0125 MHz will simply be entered as 4500125. If an invalid frequency is entered in, or if the same frequency that the SRPT-40A is currently locked on to is entered in, then the SRPT-40A will remain at its current frequency and current RF output power, i.e., nothing will happen.
- Page 26 EXECUTE pushbutton down and then release. The current frequency-in-lock will be stored in the selected channel and the SRPT-40A will remain at its current frequency. If you need to store more channels, repeat the steps in this paragraph.
- Page 27 Refer to the Control Switch Settings Command (Figure 5) for disabling or enabling the desired controls. Remove the top cover. Set the internal dip-switch S1 switches and the FREQUENCY SELECT pushwheel decimals as outlined in Figure (5). The entries in bold italics are default settings from the factory. Notice that in some cases, some settings can be achieved by more than just one unique decimal entry.
- Page 28 Figure (5) CONTROL SWITCH SETTINGS COMMAND Internal Dip-Switch (S1): Switch 1, 3, and 4 are “OFF”; Switch 2 is “ON” DECIMAL 7 (far left digit): “1” DECIMAL 6, DECIMAL 5, DECIMAL 1 (far right digit): Does Not Matter DECIMAL 4 ROTARY POT VSWR FOLDBACK REVERSE POWER...
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Page 29: Recommended Test Equipment
RECOMMENDED TEST EQUIPMENT Distortion Analyzer Krohn-Hite Model 6801 Oscillator Krohn-Hite Model 4500 Attenuator Set Hewlett-Packard Model 3500 Frequency Counter Hewlett-Packard Model 5383A (option 001) Digital Multimeter Beckman Model 3030 Analog Multimeter Triplett Model 630 RF Attenuator adjustable 0-110 dB RF Signal Generator Marconi Model 2022C Spectrum Analyzer Hewlett-Packard Model 8558B... -
Page 30: Srpt-40A Transmitter Factory Test Report
SRPT-40A TRANSMITTER FACTORY TEST REPORT Customer: _______________________________________________________________________ Address: ________________________________________________________________________ Serial No.:__________ Test Frequency:_________ Test Frequency:_________ Test Frequency:_________ Forward Power Calibration Reverse Power Calibration Audio Compressor Meter set at 0 VU Limiter Set Encode frequency set at 27 Hz. Encode frequency set at 1 KHz. deviation...