Electro-Voice Wireless System For Test & Measurement

The new Electro-Voice RTM-1 (Remote Test Microphone) is a wireless system providing a wireless link between test microphones and audio analyzers, allowing testing from many different points in a large room or arena without having to move the measurement gear.

The system includes a rack receiver with matched 1/2-wave collinear ground independent antennas and a compact bodypack transmitter that accommodates most measurement microphones. The package also includes a mic stand mounting clip for the transmitter, a metal micro-pack transmitter and a LEMO connector to XLR microphone cord.

Notably, the RTM-1 offers the ability to defeat the companding circuit, thus facilitating the transmission of audio signals without the typical distortion or coloration present in standard wireless microphones.

RTM-1 systems are available in frequencies from 566 MHz to 662 MHz and exhibit a frequency response of 50-15,000 Hz at +/- 1 dB. The receiver signal-to-noise ratio is 110 dB, typical with the compander circuit engaged.

RTM-1 systems are available for immediate order and three-week delivery. The RTM-1 is priced at $1,700 (US).

Additional Specifications, RTM-1

Rear Panel
Microphone Output Adjust
Compander On/Off

RF Specifications
Frequency: 566.3, 590.3, 614.3, 638.3 or 662.3MHz
Full, True Diversity
Sensitivity : <0.5uV for 12 dB SINAD

Audio Specifications (with compander active)
Frequency Response: - 50Hz to 15kHz, +1 dB
Audio Output Level: -50dBm to -10dBm into 200 Ohms
Distortion: Less than 0.5 percent
Signal to Noise Ratio: 110 dB typical
Dynamic Range 100 dB

Without Compander Active
Signal to Noise Ratio: 62 dB typical

Transmitter
Antenna: 1/4-wave detachable
RF Output: 45 mW typical, 50 mW max
Size: 3.75-in x 2.5-in x .75-in
Controls: Power on/off switch, Audio mute on/off switch, Audio gain adjustment with 40 dB range, Compander on/off
4-Pin LEMO Mic Input - Pin 1, Ground; Pin 2, Mic Input; Pin 3, +5V bias; Pin 4 +5V through 3l ohm