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User Manual for Ramsey Model FM100BWT
Here's the ultimate radio transmitter for any application where a
small, low power transmitter is required! This all-in-one stereo
transmitter has all the features you will ever need for
transmitting a school radio station, around your yard, or even
around the block.
•
2 Line inputs and one mic input-plus a built in mixer!
•
Line output for monitoring your broadcast!
•
PLL Crystal controlled for rock solid frequency
•
Left and right channel peak hold indicators and large LED frequency
display
•
Built in power supply, just plug it in! Now operates from 85-264VAC (47 - 63
Hz) without jumpers!
•
1W configuration for operation outside the US!
•
Auto AGC microphone muting function for cool talk-overs
•
Rugged steel enclosure for years of service
FREQ
UP
POWER
FREQUENCY
FREQ
DOWN
MIC
SELF
SETUP
TEST
AUDIO
(L)
LEVEL
MIC ON
+9
+6
+3
FREQ LOCK
0
-3
-6
-9
-12
-15
-18
LINE 1
AUTO
AGC
FM100B • 1
(R)
+9
+6
+3
0
-3
-6
-9
-12
-15
-18
MIC
LINE 2
Model FM100B
MIC
INPUT
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Related Manuals for Ramsey Electronics FM100BWT
Summary of Contents for Ramsey Electronics FM100BWT
- Page 1 User Manual for Ramsey Model FM100BWT Here’s the ultimate radio transmitter for any application where a small, low power transmitter is required! This all-in-one stereo transmitter has all the features you will ever need for transmitting a school radio station, around your yard, or even around the block.
- Page 2 RAMSEY MINI-KITS Many other kits are available for hobby, school, Scouts and just plain FUN. New kits are always under development. Write or call for our free Ramsey catalog. FM100B PROFESSIONAL STEREO TRANSMITTER USER MANUAL Ramsey Electronics publication No. MFM100B Revision 1.1d First printing: January 2002 COPYRIGHT 2002 by Ramsey Electronics, Inc.
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Page 3: Table Of Contents
Ramsey Publication No. MFM100B Price $10.00 USER MANUAL FOR FM100B PROFESSIONAL STEREO TRANSMITTER TABLE OF CONTENTS Introduction ........4 Using the FM100B ......6 FCC Rules and Information....10 FM100B Specifications ....19 Warranty........... 23 RAMSEY ELECTRONICS, INC. 590 Fishers Station Drive... -
Page 4: Introduction
INTRODUCTION TO THE FM100B First we will begin with a little history of stereo transmitters at Ramsey Electronics in order to give you an idea of how we arrived at the development of the FM100B as our latest stereo transmitter. We have many people call us each day asking questions about our earlier versions of transmitters such as the FM25B and the FM10A. - Page 5 ADJUSTING YOUR FM100B TRANSMITTER: Keep all tests very brief until you have carefully chosen an open operating frequency in the FM broadcast band. 1. Transmitting Frequency: After finding a suitable "open" frequency in the 88-108 MHz FM band, adjust the frequency by first getting the FM100B into setup mode by pressing both FREQ keys at the same time.
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Page 6: Using The Fm100B
USING THE FM100B WITHIN THE HOME: A most practical use for the FM100B would be to connect it to the main stereo system within a large home so that whatever is playing on the main system can also be tuned-in on portable FM radios in other rooms, the garage or in the yard. - Page 7 ANTENNA IDEAS: With the one watt output of the FM100BWT you must use a properly matched external antenna. It is mounted on the rear F connector. Ramsey Electronics now offers an antenna called the “Tru-Match FM Broadcast Antenna”. This antenna has been specifically tested and designed for the FM- series of micropower transmitters and will help you get the most out of these products.
- Page 8 (and what not to do). Because such an installation is beyond the original purpose of this kit and the safety standards intended for all Ramsey kits, we cannot provide further details for such an installation. Just wetting your whistle a bit! USING YOUR FM100B •...
- Page 9 • Turning on the microphone: [1] Make sure a microphone is plugged into the appropriate jack (3.5 mm). [2] Pre-set the gain level of the microphone before coming on the air. This will prevent the audio level of your voice varying every time you come on. [3] Use the MIC button to toggle between on and off as indicated by the MIC ON LED..
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Page 10: Fcc Rules And Information
19.” The cost is $30.00 or so, Master Card and Visa accepted. It is the policy of Ramsey Electronics, Inc., that knowing and observing the lawful use of all kits is a first responsibility of our kit user-builders. We do not endorse any unlawful use of any of our kits, and we do try to give you as much common sense help about normal and lawful use as we can. - Page 11 May, 1990. This is only a brief look at the rules and should not be construed to be the absolute complete legal interpretation! It is up to you to operate within the proper FCC rules and Ramsey Electronics, Inc. cannot be held responsible for any violation thereof.
- Page 12 a. The transmitter must NEVER be tuned to a frequency above 108 MHz, specifically the band 108-121.94 MHz, FCC Rule 15.205 lists this band as restricted, due to potential interference with aircraft navigation equipment. b. The "bandwidth" of your transmission is limited to 200 KHz, centered on the actual operating frequency.
- Page 13 DISTANCE FROM TRANSMITTER ANTENNA METERS FEET FIELD STRENGTH TOTAL (µV) RECEPTION AREA 314 FT 1256 FT 4800 FT 19113 FT 1.8 ACRES 7.2 ACRES 28.6 ACRES 1260 11.4 ACRES 2520 458 ACRES 1536 5036 1830 ACRES APPENDIX B: UNDERSTANDING LEGAL "FIELD STRENGTH" A "microvolt"...
- Page 14 In all cases, the field strength of a signal decreases in direct proportion to the distance away from the antenna. Power decreases by the square of distance: for every doubling in distance, the signal power is quartered, but the field strength voltage is only halved.
- Page 15 about 114 acres. A quick glance at stereo FM receiver specifications shows typical sensitivity of 1.7 µV before considering high-gain antennas or preamplifiers. Your non-licensed signal can provide serious competition to a public broadcast station fifty miles away, a station which someone in your neighborhood may have set up a special antenna to enjoy.
- Page 16 SUMMARY The present edition of Part 15 of the FCC rules does not provide detailed guidance on ALL aspects of using a low-power transmitter such as the FM100B. The main point is that you may not cause any interference whatsoever to licensed broadcast services and that you must be willing to put up with any interference that you may experience.
- Page 17 NOTICE: The radio-frequency "intentional radiator" device which may be constructed from kit parts supplied by us is intended and designed by Ramsey Electronics, Inc. to conform to applicable provisions of Part 15 of FCC Rules. The individual kit-builder and all users of this device assume responsibility for lawful uses conforming to FCC Part 15 Rules.
- Page 18 Learn the rules...observe them...and have fun in radio! If you enjoyed this Ramsey product, there are plenty more to choose from in our catalog - write or call today! Or visit us on the web at: www.ramseykits.com!
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Page 19: Audio Input
FM100BWT SPECIFICATIONS AC power input: 85 - 264 VAC (47 - 63 Hz) @ 1 Amp Frequency coverage: 88.0 -108.0 MHz Frequency steps: 100 kHz Bandwidth: +/- 75 kHz with built-in limiter Broadcast modes: Stereo / Mono Pre-emphasis: 50 usec (Europe) / 75 usec (U.S.) selectable... - Page 20 FM100B • 20...
- Page 21 FM100B • 21...
- Page 22 FM100B • 22...
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Page 23: Warranty
Time involved for repair depends on the product. It typically runs one to two weeks after factory receipt. Ramsey Electronics reserves the right to refuse repair on any item. REFUNDS: You are given ten (10) days to examine our products. If you are not satisfied, you may return the product in original condition including instruction and proof of purchase to the factory for a full refund. -
Page 24: Victor, New York
Using the FM100B......6 FCC Rules and Information....10 Specifications ........19 Warranty........... 23 Price: $10.00 Ramsey Publication No. MFM100B Assembly and Instruction manual for: RAMSEY MODEL NO. FM100B RAMSEY ELECTRONICS, INC. 590 Fishers Station Drive Victor, New York 14564...