MARTI ELECTRONICS RPU TRANSMITTER MODEL SRPT-40A
WARNING THIS EQUIPMENT MUST BE OPERATED WITH A 3-PRONG GROUNDED OUTLET RECEPTACLE. FAILURE TO USE A PROPERLY GROUNDED OUTLET MAY RESULT IN IMPROPER OPERATION OR SAFETY HAZARD! LIMITED WARRANTY The Seller warrants that, at the time of shipment, the products manufactured by the Seller are free from defects in material and workmanship.
Artwork depicting circuitry in this manual is protected by copyright laws. 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.
TABLE OF CONTENTS Introduction ..........………................................................................................................. 1 Specifications & Ordering................................................................................................. 2 Unpacking and Inspection ................................................................................................. 4 Installation .......................................................................................................
INTRODUCTION See the SPECIFICATIONS & ORDERING section for a listing of available frequency ranges and power models. The Marti Model SRPT-40A is a wide-band – high power RPU Transmitter designed to operate in the Remote PickUp 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.
Model SRPT-40A Remote Pick-Up Broadcast Transmitter SPECIFICATIONS & ORDERING Frequency Bands and Maximum Output Power: Frequency Resolution: RF Connector: Operating Temp. Range: Modulation (Specify): Preselect Storage Channels: See ORDERING INFORMATION below. 12.5 or 10.0 KHz steps (user selectable) Type N-Female -10 Cº to +45 Cº 10KOF3E 25KOF3E 50KOF3E FCC Frequency Group P FCC Frequency Group K, L, N2 FCC Frequency Group N1, R Or special order Can store and recall up to 10 frequency channels.
Weight: Net 8 pounds. Domestic packed 11 pounds. Net 3.63 kilograms. Export packed 5.27 kilograms. Dimensions: 11.5 in. wide x 3.5 in. high x 13.3 in. deep. (29.21 cm. wide x 8.89 cm. high x 33.78 cm. deep.) Options available: For a complete listing see below. ORDERING INFORMATION MARTI PART # SRPT-40A/450 Frequency Range (MHz) 435 - 475 Maximum RF Output Power (W) 50 Certifications FCC ID: DDE-RPU-50W-450S (FCC Part 74 Subpart D) NOTE: Other models will be available by 11/1/2001.
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. Unpack equipment immediately upon receipt and thoroughly inspect for concealed damage.
INSTALLATION Install rack-mounted equipment in a well-ventilated, well-grounded, and shielded rack cabinet. Do not locate solid-state equipment in a rack above tube-type equipment which produces high temperatures. It is highly recommended that if the equipment is mounted in a rack cabinet, a blower should be installed in the cabinet as well. Problems can also be avoided by locating this unit away from other equipment which has transformers that produce strong magnetic fields.
WARNING THIS EQUIPMENT MUST BE OPERATED WITH A 3-PRONG, GROUNDED, 90-264 VOLT, AC OUTLET RECEPTACLE! FAILURE TO USE A PROPERLY GROUNDED OUTLET COULD RESULT IN A SAFETY HAZARD OR FAULTY EQUIPMENT PERFORMANCE. IF AN EXTENSION CORD IS USED, IT MUST BE THE THREE-WIRE GROUNDING TYPE TO INSURE SAFETY. WARNING DO NOT CUT OFF THE GROUND PIN OF A 3-PRONG PLUG! EXCESSIVELY LONG EXTENSION CORDS SHOULD BE AVOIDED SINCE THE VOLTAGE DROP CAN DEGRADE EQUIPMENT PERFORMANCE. DO NOT ALLOW THE SRPT-40A TO GET WET.
Receiver Mounting For mobile repeat using the Marti AR-10 Mobile Repeat Receiver, mount the receiver near the transmitter using the three fasteners supplied in Mobile Mounting Kit, 700-251. SRPT-40A and RPT-30 Mobile Remote Control Remote control of the SRPT-40A transmitter requires a switch to control primary 12-15 VDC power (or 15-30 VDC) and a second switch to control the transmit function.
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Fixed Base Station and Repeater Installation 1. Install transmitter in standard rack by using Rack Mounting Kit No. 700-253 available from Marti. CAUTION ALLOW ONE PANEL SPACE ABOVE AND BELOW TRANSMITTER FOR INLET AIR-FLOW TO INTERNAL FAN. 2. Connect transmitting antenna to ANTENNA connector on SRPT-40A rear panel. 3. Plug transmitter into a 3-prong, grounded 90-264 volt, AC outlet. WARNING FAILURE TO USE A PROPERLY GROUNDED OUTLET COULD RESULT IN A SAFETY HAZARD OR FAULTY EQUIPMENT PERFORMANCE. 4.
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.
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. Each antenna should be attached to the tower using the proper side mount or top mount hardware.
CONTROL & CONNECTOR FUNCTIONS ACCESSORY Input Connector Audio Input: When Input 4 is switched to “HI” level, audio can be fed into pins 4 and 5 of the ACCESSORY connector on the rear of the transmitter. Input level should be between 0.2 volts to 2.0 volts rms. The output impedance of the device connected to Input 4 should be 8 - 600 ohms. For unbalanced operation ground pin 5 to pin 1, 8, 11, or 12 and connect audio to pin 4. Use standard 15-pin “subminiature D” female connector with cover.
CAUTION & WARNING NEVER INSTALL AND CONNECT THE 12-15 VOLT AND THE 15-30 VOLT SUPPLIES AT THE SAME TIME. ALSO, NEVER CONNECT THE 15-30 VOLT SUPPLY TO THE 12-15 VOLT PINS AND NEVER CONNECT THE 12-15 VOLT SUPPLY TO THE 15-30 VOLT PINS. DOING SO MAY DAMAGE THE INTERNAL SWITCHING SUPPLY OR EITHER OF THE EXTERNAL DC SUPPLIES. CAUTION & WARNING NEVER CONNECT THE SRPT-40A TO THE AC LINE AND EITHER OF THE EXTERNAL DC SUPPLIES AT THE SAME TIME.
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 & WARNING NEVER INSTALL AND CONNECT THE 12-15 VOLT AND THE 15-30 VOLT SUPPLIES AT THE SAME TIME. ALSO, NEVER CONNECT THE 15-30 VOLT SUPPLY TO THE 12-15 VOLT PINS AND NEVER CONNECT THE 12-15 VOLT SUPPLY TO THE 15-30 VOLT PINS.
When the internal controller detects a PA temperature of greater than 90 degrees C, the RF output power will completely shutdown, and the HIGH TEMP LED will flash red at a rate of twice a second. The RF output power will stay shutdown until the PA temperature has dropped below 65 degrees C. When the internal controller detects that the PA temperature is below 65 degrees C, it will turn off the HIGH TEMP LED and then enable the PA to transmit power.
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.
OPERATION Connect up SRPT-40A to the AC Line Receptacle or External DC Supply CAUTION & WARNING NEVER CONNECT THE SRPT-40A TO THE AC LINE AND EITHER OF THE EXTERNAL DC SUPPLIES AT THE SAME TIME. 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.
CAUTION & WARNING NEVER INSTALL AND CONNECT THE 12-15 VOLT AND THE 15-30 VOLT SUPPLIES AT THE SAME TIME. ALSO, NEVER CONNECT THE 15-30 VOLT SUPPLY TO THE 12-15 VOLT PINS AND NEVER CONNECT THE 12-15 VOLT SUPPLY TO THE 15-30 VOLT PINS. DOING SO MAY DAMAGE THE INTERNAL SWITCHING SUPPLY OR EITHER OF THE EXTERNAL DC SUPPLIES. Connect up Antenna Connect antenna to the ANTENNA connector on the SRPT-40A rear panel. Connection of various antenna systems is covered under INSTALLATION and ANTENNAS.
an inch behind the POWER ADJUST bezel ring) to adjust the forward power to a desired output power as indicated on the METER. What Frequency Will the SRPT-40A Power-Up on? If you’re not sure what frequency the SRPT-40A will power up on, first make sure that the POWER ADJUST pot is at a minimum (turned fully counter-clockwise) before powering up the SRPT-40A. After the SYNTHESIZER is locked and the TRANSMIT/STANDBY switch is set in the TRANSMIT position, monitor the RF output with a frequency counter.
What is A Valid Output Frequency? A valid output frequency is defined as an output frequency that is divisible by the set reference frequency (12.5 KHz or 10.0 KHz) and one which is within the valid operating bands. All seven digits on the front panel FREQUENCY SELECT pushwheel switches must be entered. The frequency is entered in MHz where the first three digits represent the left side of the decimal place, and the last four digits represent the right side of the decimal place.
Next, set the six left-most digits (digits 2-7) of the FREQUENCY SELECT pushwheel switches equal to zero. Then the far right digit (digit 1) is set to the channel of choice (channel 0 – channel 9) to be stored. After entering the channel, press the 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.
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.
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 INPUT NUMBER ROTARY POT VSWR FOLDBACK REVERSE POWER POWER ADJUST DISABLED CALIBRATION ENABLED ENABLED 0 No No No 1 No Yes No 2 No Yes No 3 No Yes Yes 4 Yes No No 5 Yes Yes No 6 Yes Yes No 7 Yes Yes Yes 8 No No No 9 No Yes No Note: Entries in bold italics are standard default from facto
RECOMMENDED TEST EQUIPMENT Distortion Analyzer Oscillator Attenuator Set Frequency Counter Digital Multimeter Analog Multimeter RF Attenuator RF Signal Generator Spectrum Analyzer Wattmeter (50 ohms impedance) 5 or 50 watt element Automatic Modulation Meter 50 watt RF Load Stereo Monitor Stereo Generator Oscilloscope Krohn-Hite Model 6801 Krohn-Hite Model 4500 Hewlett-Packard Model 3500 Hewlett-Packard Model 5383A (option 001) Beckman Model 3030 Triplett Model 630 adjustable 0-110 dB Marconi Model 2022C He
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.
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