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FMTR-27R
27MHz Transceiver
Features
• Half-duplex radio data module
• 1W Power Output
• 300 - 4800 bauds data rates
Application
• Long distance mobile applications
• Wireless communications
• Radio remote controls
• Telemetry or wireless security systems |
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 Download Datasheet
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Description
The FMTR-27R transceiver is a 27MHz half-duplex radio data module. With a RF power output of 1W combined with its light weight and compact size, makes it suitable for long distance mobile applications. Applications such as wireless communications, radio remote controls, telemetry or wireless security systems is most suitable for the FMTR-27R transceiver.
Data rates from 300 to 4800 bauds can be transmitted and received.
Transmit Mode
When the enable pin is high (+5Volts) the transceiver goes to transmit mode. In transmit mode, when an input signal (Data) is fed to the TX Data pin a FM modulated signal is transmitted directly through the antenna output terminal (Sh A Sh) block. A suitable 27MHz antenna should be connected to this terminal block. We recommend the Elsema ANT27M or ANT27L 27MHz antenna.
Transmit mode should be disable (TX enable pin to 0 Volts) to avoid unnecessary transmission if no data is on TX Data pin. This also enables the receiver which puts the transceiver into the receive mode.
For technical specifications on the transmitter refer to the FMT-2712 radio data module.
Receive Mode
When the transmitter is disabled the receiver will receive signals. This can be from another FMTR-27R transceiver or any other FM modulated signal that matches the carrier signal.
For reception a suitable antenna must be connected to the antenna terminal block. Transmitter output and receiver input uses the same antenna terminal. We recommend the Elsema ANT27M 27MHz antenna.
For technical specifications on the receiver refer to the FMR-05 receiver.
Operating Distance
Up to 2000m, depending on installation and type of antenna used. Recommended Antenna is Elsema ANT27M.
(Range tests were done in an open area test site with line-of-sight operation and no interference. The receiver antenna wire was fixed vertically, away from any metal objects.)
Compatibility
All Elsema type FMR-… series:
FMR-201
FMR-212
FMR-224
FMR-212T
FMR-202
FMR-204/16
FMR204-12
FMR204-24
FMR-240
FMR-232R
Technical Data
Supply |
11-13.6VDC (for constant RF-Output), screw type terminal block. Do not use AC supply. |
Current Consumption |
Transmitting:400mA
Receiving: 12mA |
Operating Frequency |
27.145MHz (Other freq. available: 27.045, 27.195 & 27.455MHz. NB. 27.455 freq. is not available for Australia ) |
Carrier Freq. Tolerance |
Crystal controlled 30 parts per million (0-50 ° C) |
Type of Emission |
Narrow-bandwidth Frequency Modulation (5K00F1D) |
Transmitter RF Output |
Typical 1W, into 50 Ohms |
Antenna |
Terminal Connection provided. Optimum performance use Elsema ANT27M antenna. A piece of 1m wire will give an operating range up to 100m. Use longer wire for better results. |
Transmitter Data Input Level |
0-5V |
Receiver Frequency Response |
100Hz - 2400Hz |
Receiver Data Input Level |
0-5V (22kOhms source) |
Dimension |
100 x 61 x 20mm |
Weight |
54g |
Mounting Hole Size |
3.97mm or 5/32" |
Mounting Hole Spacing |
Length 91mm (3.60")
Width 51.25mm (2.02") |
Block Diagram
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