ATR7000 Series VHF Wireless Systems
Installation and Operation
english
6
System Operation
Turn down the receiver volume control and the mixer/amplifier level before starting up the
wireless system. Do not switch on the transmitter yet.
Receiver on...
Plug the power supply into an AC power source. Turn on the rotary On/Off/Volume control. The
red power indicator on the front panel will light.
Transmitter on...
When the transmitter is switched on, the receiver’s green RF signal indicator will light. The
transmitters have a 3-position power switch. When the switch is set to “Standby” (ST or ST.BY),
the transmitter produces RF with no audio signal. When the switch is “On,” the transmitter
produces both RF and audio. Excessive audio input to the transmitter will cause the receiver’s
red AF Peak indicator to light.
Receiver Volume
Under typical operating conditions, the receiver's volume control should be turned all the way
up, with overall system audio gain adjusted at the mixer or amplifier
Ten Tips to Obtain the Best Results
1. Use only fresh alkaline batteries. Do not use “general purpose” (carbon-zinc) batteries.
2. Position the receiver so that it has the fewest possible obstructions between it and the normal
location of the transmitter. Line-of-sight is best.
3. The transmitter and the receiver should be as close together as conveniently possible.
4. If receiver signal is weak, try mounting it in the vertical position for improved reception.
5. Do not place the receiver antenna within 3' (1 m) of another receiver or antenna.
6. The receiver antenna should be kept away from any metal.
7. A receiver cannot receive signals from two transmitters at the same time.
8. If the receiver output is set too low, the overall signal-to-noise ratio of the system may be
reduced. Conversely, if the volume control of the receiver is set too high, it may over-drive the
input of the mixer/amplifier, causing distortion. Adjust the output level of the receiver so the
highest sound pressure level going into the microphone (or the loudest instrument playing
level) causes no input overload in the mixer, and yet permits the mixer level controls to operate
in their “normal” range (not set too high or too low). This provides the optimum signal-to-noise
for the entire system.
9. Turn the transmitter and receiver off when not in use. Remove the battery if the transmitter is
not to be used for a period of time.
10. Make sure to screw down the locking ring on the guitar and microphone cables for a secure
connection.
System Operating Frequencies
Frequency Selection
Each transmitter/receiver system operates on a single factory aligned, crystal-controlled frequency.
Available frequencies are shown in the chart on page 7.
Operating frequency is specified by a two character code, such as “T2,” in addition to the actual
frequency in MHz. The frequency of each transmitter appears on a label on the outside/back of
the unit. The frequency of each receiver appears on a label on the bottom panel of the unit. On
the body-pack the transmitter is located outside on the back. The handheld label is located inside
the back of the battery compartment. The frequency of each system appears on the outer carton.
For future reference, please record them in the space provided below.
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