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THIS EQUIPMENT MUST BE OPERATED WITH A 3-PRONG
GROUNDED OUTLET RECEPTACLE.
PROPERLY GROUNDED OUTLET MAY RESULT IN IMPRO-
PER 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. The Seller's
obligation under this warranty is limited to replace-
ment or repair of such products which are returned to
Marti at its factory, transportation prepaid and
properly insured, provided:
a. Notice of the claimed defect is given to Marti
within one (1) year [two (2) years for STL systems]
from date of original shipment and goods are re-
turned in accordance with Marti instructions.
b. Equipment, accessories, tubes and batteries not
manufactured by Marti are subject to only such ad-
justments as Marti may obtain from the supplier
thereof.
c. This warranty does not apply to equipment
which has been altered, improperly handled, or dam-
aged in any way.
The Seller is in no event liable for consequential
damages, installation cost or other costs of any nature
as a result of the use of the products manufactured or
supplied by the Seller, whether used in accordance
with instructions or not.
This warranty is in lieu of all others, either expressed
or implied. No representative is authorized to assume
for the Seller any other liability in connection with
Seller's products.
MAILING & SHIPPING ADDRESS:
M
Electronics, Inc.
ARTI
P.O. Box 661
Cleburne, Texas 76031-0661
The United States of America
W A R N I N G
1501 N. Main St.
FAILURE TO USE A
COPYRIGHT NOTICE
©1993 All Rights Reserved
Marti Electronics, Inc.
4th printing, December 1993
No part of this manual may be reproduced, transmit-
ted, 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, Inc.
Artwork depicting circuitry in this manual is pro-
tected 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, Inc.
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.
PHONE NUMBERS:
Sales & Service
FAX
(817) 645-9163
(817) 641-3869

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Summary of Contents for Marti RPT-30

  • Page 1: Limited Warranty

    Marti Electronics, Inc. a. Notice of the claimed defect is given to Marti within one (1) year [two (2) years for STL systems] Artwork depicting circuitry in this manual is pro- from date of original shipment and goods are re- tected by copyright laws.
  • Page 2 Tools and Test Equipment Required ................Block Diagram, Drawing No. 702-073 ................Location of Adjustments, Drawing No. 702-076 ............Factory Test Report ...................... Tune-Up Procedure and Adjustment ................Function of RPT-30 Semi-Conductors ................Main Frame Schematic, 702-074 ............Parts List, 702-074 ............Pre-Amp/Mixer Schematic, 800-251 ............
  • Page 3 This page intentionally left blank...
  • Page 4 Remote Pick-Up state audio processing technique pioneered and Broadcast Service as defined in Part 74, Subpart proven by Marti Electronics in thousands of re- D, of the FCC Rules and Regulations. Refer to mote pick-up broadcast transmitters over the “Specifications”...
  • Page 5: Specifications

    Model RPT-30 Remote Pick-Up Broadcast Transmitter Specifications 140 - 180 MHz. - 45 watts Frequency Range and 200 - 260 MHz. - 40 watts Maximum Power Output: 280 - 340 MHz. - 35 watts 400 - 480 MHz. - 30 watts...
  • Page 6 Weight: Net 12.4 pounds. Domestic packed 16 pounds. Net 5.62 kilograms. Export packed 7.62 kilograms. 11.5 in. wide x 3.5 in. high x 13.3 in. deep. Dimensions: (29.21 cm. wide x 8.89 cm. high x 33.78 cm. deep.) Options available: Second crystal for dual-frequency operation, rack mounting brackets, mobile mounting brackets, antenna switching relay, audio companding, etc.
  • Page 7 UNPACKING & INSPECTING This equipment was factory tested, by local agent of carrier. A written inspected, packed, and delivered to report of the agent's findings, with the carrier with utmost care. Do not his signature is necessary to support accept shipment from carrier which claim.
  • Page 8 (typically less than one mile). If greater range is needed, consider locating the 2. With the RPT-30 CONTROL switch in “OFF” posi- transmitting antenna outside the building at a height tion, plug the transmitter into a grounded, three-prong, necessary to provide a line-of-sight path to the receiving 115 volt, AC outlet.
  • Page 9 RPT-30 can be powered from a fully charged automobile Fig. 1. (Fasteners are in Mobile Mounting Kit, 700-251) battery. The RPT-30 draws five (5) amps at 12.6 volts DC. Use D.C. Power Cable, Fuse and Plug, No. 586-074. 3. Mark the location of the two mounting holes in each fastener bracket.
  • Page 10 CAUTION: TOTAL CONTROL CIRCUIT RESISTANCE MUST whether antenna duplexing is used. Antennas are speci- NOT EXCEED 0.3 OHMS! fied in the various system packages listed in the Marti literature. The installer should follow the instructions Control circuits having more than 0.3 ohms resistance supplied with the mobile antennas.
  • Page 11 RPT-30 transmitter. Connect receiving 3. If a receiver is to share the antenna with the transmit- antenna to receiver J6 and transmit antenna to RPT-30 ter (as in a two-way base station), the transmitter must be ANTENNA connector.
  • Page 12 Keep the RPU receiver coaxial cable as far from the errors in assembly and adjustment. Marti Electron- broadcast transmitter and its coaxial cable as possible. ics, Inc. assumes no responsibility for the installation...
  • Page 13 STALLING ANTENNAS AWAY FROM POWER LINES...
  • Page 14 -2 VU gain-reduction is indicated. These balanced inputs are for a 150 ohm dynamic microphone such as the Marti MCD-70C or MCD-70D 4. Once the proper gain level is determined, it will not be with standard XLR-3 or A3M connector. Microphone necessary to change it for that particular microphone or connections are given in INSTALLATION.
  • Page 15 The red LED light marked “ANTENNA” which is to into MONITOR jack. Set GAIN controls for no more the right of the METER on the RPT-30 front panel, than -3 VU audio compression on the METER. flashes to indicate a problem with the antenna when transmitting.
  • Page 16: Theory Of Operation

    Integrated Circuit IC-1 serves as a (a) pre-amp [not used L1, L2, and L3. L4 and L5 provide a path for Q1 base on the RPT-30, (b) pre-emphasis amplifier, (c) voltage- current and the L5 - R1 parallel circuit reduces low controlled attenuator, (d) regulator/ripple rejection.
  • Page 17 heat sink at the rear of the transmitter, and supplies 13.5 components, a reverse polarity protector diode D2 is volts DC at 5 amps. located on the 800-253 board. INPUT/OUTPUT FILTERS, 800-253 METER BOARD, 800-252 All input/output circuits connected to ACCESSORY The METER, meter illumination lamp, ANTENNA connector, as well as the AC line input, have radio- (WARNING LIGHT) and TEMP (WARNING LIGHT)
  • Page 18 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 19 This page intentionally left blank...
  • Page 20 RPT-30 Transmitter FACTORY TEST DATA Customer: _______________________________________________________________________ Address: ________________________________________________________________________ Serial No.:__________ Frequency #1 (F1):___________ Frequency #2 (F2):___________ 140 - 200 MHz 200 - 480 MHz 0.35 - 0.70 0.25 - 0.50 0.40 - 0.80 0.20 - 0.60 NOT USED 0.60 - 1.20 0.25 - 0.50...
  • Page 21 Connect Bird wattmeter with 50 ohm load and a 50 1. Connect Dummy Load to RF output J4. Remove top watt element (for the correct frequency range) to RPT-30 cover of transmitter. Connect the positive lead of a 0-20 ANTENNA connector. Connect a 13.5 volt DC regulated volt DC, digital voltmeter of 0.2% accuracy (or better) to...
  • Page 22 Marti re- ceiver being used with the RPT-30. Feed a 100 microvolt 2. Notice the Neutrik mic. connector has a small hole signal from the transmitter into the receiver RF input.
  • Page 23 Function of Semiconductors in the RPT-30 Device Reference Designation Schematic Function IC-1A 800-166 Integrated Circuit, Microphone Preamplifier IC-1B 800-166 Integrated Circuit, Pre-emphasis Audio Amplifier IC-1C 800-166 Integrated Circuit, Audio Rectifier and Voltage-Controlled Audio At- tenuator (Compressor) IC-1D 800-166 Integrated Circuit, Power Supply, Electronic Filter...

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