User's Manual

Table 1
Specifications
Operating Frequency
Channel 1 907 MHz
Channel 2 915 MHz
Channel 3 923 MHz
RF Output Power 1 mW (0 dBm)
Operating Voltage 7.5 to 18VDC
Operating Current 65 mA
Video Frequency Response 0.5 – 5.0 MHz
Signal to Noise Ratio 60 dB
FM Deviation (@ 1V P-P input) +/- 3 MHz
Differential Gain Error 3% p-p (max)
Differential Phase Error 3% p-p (max)
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
Installation Instructions
Before Beginning the Installation
Plan the installation of the AVT900-3A transmitter carefully. The physical location and
orientation of the unit itself will have a significant influence on reception quality at the
receiver, particularly at longest ranges. The unit, and its standard antenna, should be
positioned vertically (pointing either up or down). If necessary, use double-sided foam
tape or hook & loop fasteners (not supplied) to secure the unit to a vertical surface. Also,
keep in mind that the RF signal from the transmitter will travel through most non-metallic
building materials (wood, stucco, brick, etc.), however maximum stated reception range
is based on unobstructed line of sight conditions.
Selecting the Channel of Operation
Referring to Figure 1, use a small flat-blade screwdriver to select the channel (frequency)
on which the transmitter will broadcast, by aligning the triangle-shaped pointer (not the
screwdriver slot) to the number of the desired channel. Be sure to set the receiver to the
matching channel. Channels are as follows:
Channel 1: 907 MHz
Channel 2: 915 MHz
Channel 3: 923 MHz
Any other setting of the channel selector (0, 4, 5, 6, 7, 8, 9) defaults to Channel 1.