User's Manual

14 Applied Wireless, Inc.
Technical Specifications
AT900-32 Transmitter
Operating Frequency (32 Channels) 902 – 928 MHz
Operating Voltage Range 7.5 to 18VDC
Operating Current 120 mA
Audio Signal-to-Noise Ratio* 78 dB
Audio Frequency Response (+/-3dB)* 50 - 15,000 Hz
Audio Channel (L/R) Separation (@ 1KHz)* 30 dB
Audio Distortion (@ 1kHzm +/-25KHz deviation)* 0.3%
Stereo Pilot Level -20 dBc
RF Output Power 1 mW (0 dBm)
Frequency Stability (over operating temp.range) +/-30 ppm
FM Deviation +/-75 KHz
Harmonic Suppression -45 dBc
Antenna Output Impedance 50 Ohms
Operating Temperature Range
-20°C to +70°C
Storage Temperature Range
-50°C to +150°C
*Audio performance specifications are “end-to-end” characteristics,
when used with Model AR900-32 receiver.
AR900-32 Receiver
Operating Frequency (32 Channels) 902 – 928 MHz
Operating Voltage Range 7.5 to 18VDC
Operating Current 140 mA
Audio Frequency Response (+/-3dB, flat EQ)* 50 - 15,000 Hz
Audio Channel (L/R) Separation (@ 1KHz)* 30 dB
Audio Signal-to-Noise Ratio* 50 dB
Audio Distortion (@ 1kHzm +/-25KHz deviation)* 0.3%
RF Input Sensitivity (30 dB SNR) -106 dBm
IF Bandwidth 180 KHz
Antenna Input Impedance 50 Ohms
Frequency Stability (over operating temp. range) +/-30 ppm
Operating Temperature Range
-20°C to +70°C
Storage Temperature Range
-50°C to +150°C
*Audio performance specifications are “end-to-end” characteristics,
when used with Model AT900-32 transmitter.
User’s Guide – 900MHz Stereo Audio Transmitter & Receiver 3
Note 1: If the audio source device provides only a single (mono) output, a
“Y” adaptor (not supplied) may be used to feed the signal to both of the
transmitter’s input jacks.
Note 2: If a microphone is to be used as the audio source, an external
microphone preamp (not supplied) must be used to raise the microphone’s
output signal to the required line level.
Connecting the AR900-32 Receiver’s Audio Outputs
Using the shielded dual audio cable provided, connect the receiver’s line
level audio outputs to the appropriate inputs on the device that is to
amplify and reproduce (or record) the received audio signals (refer to
Figure 2). If the destination device has only a single (mono) input, a “Y”
adaptor (not supplied) may be used to combine the receiver’s LEFT and
RIGHT outputs, and feed the combined signal to the destination device’s
mono input jack.
Figure 1 – AT900-32 Transmitter (Rear Panel)