BlackMax Transmitter Module

Audio Transmitter

The DRTXM4 Synchronized Audio Transmitter is the highest-efficiency HAR transmitter manufactured. It produces a strong signal to broadcast your highway advisory messages at the maximum legal power allowed by the FCC. Comprehensive metering is clearly displayed on the front panel to indicate the transmitter is performing.

The DRTXM4 Synchronized Audio Transmitter is power adjustable to use the full 10W allowed by FCC and can be adjusted from 0-10W by an adjustment knob located on the side of the transmitter. When used in conjunction with the TCM-1 amplifier module, output wattage of up to 30W can be attained.

Quick Facts

Capable of 100% modulation
Modular design provides easy access and maintenance
Front-panel status indicators provide quick visual feedback on transmitter status

Capabilities

PRODUCES UP TO A 10 WATT BROADCAST SIGNAL

Front panel power switch and RF output connector.
Overload mismatch output protection
5 level LED modulation display

Technical Specifications

Interface, Port Data

RF Output	0 to 10W as allowed by FCC
Audio Distortion	<1.5% from 200Hz to 3.5kHz
Frequency	530 to 1700 khz
Modulation	100% • Speech limiter controls
Audio Response	Better than ± 1 dB • Better than 20 dB down at 100 Hz Better than 30 dB down at 60 Hz • Attenuation above 3 kHz conforms to FCC specifications
Inputs	Normal audio input from recorder/player through backplane Auxiliary balanced, high-impedance, phone-line

Environmental Data

Dimensions	10.3” (h) x 3.2” (w) x 9.2” (d
Power Requirements	10 to 14 VDC at less than 2A
Operating Temperature	-40° C to +85° C
Storage Temperature	-40° C to +85° C
Humidity	20%-95% RH, non-condensing
FCC Certification	O2Q-DRTMX4