3000 Series Installation and Operation 10
4. Use the Up/Down arrow buttons to change the second three digits
to the desired frequency.
5. To activate this frequency selection, press and hold the Set button
until the word “STORED” appears in the transmitter’s window. (If
you do not wish to complete this selection, just press the Set button
once: the word “ESCAPE” will appear briey in the window and the
transmitter will return to the Menu mode.)
6. When nished entering a frequency, press the Up arrow button
once to move to “QUIT”. Then press the Set button once to exit
the menu. The word “MENU” in the transmitter window will go off,
indicating the return to normal operation.
When the transmitter is switched on and in normal operation, the
receiver’s “RF” signal-level bars will display from bottom to top,
with more bars indicating increased signal reception. For optimum
performance at least four, and preferably ve or more, of the RF
indicators should be displayed.
Setting Transmitter Audio Input Levels
Correct adjustment of transmitter audio input, receiver audio output,
and mixer/amplier input and output levels is important for optimum
system performance.
ATW-T310b and ATW-T341b Transmitters
A 4-position audio input gain setting, selected through the function
menu, serves to match the audio input level to the transmitter for best
modulation with minimum distortion. Available choices are +12 dB,
+6 dB, 0 dB and -6 dB. The default value is +6 dB. Select the highest
setting that does not result in over-modulation with the highest audio/
instrument input levels (an AF indication on the receiver no higher than
“0”).
ATW-T371b Transmitter
A 3-position audio input gain setting, selected through the function
menu, serves to match the audio input level to the transmitter for best
modulation with minimum distortion. Available choices are +12 dB, +6
dB, and 0 dB. The default value is +6 dB. In addition, a mechanical pad
switch on the condenser capsule (inside the screw-on wire mesh grille)
can provide another 6 dB of attenuation. For best performance, adjust
the input level using the function menu choices, keeping the capsule’s
mechanical switch at 0 dB. If more audio attenuation is needed than the
menu provides, then set the capsule’s pad switch to -6 dB.
RF Power Adjustment
RF power may be set to “RF HI” (30 mW nominal) or “RF LOW”
(10 mW nominal) through the function menu. The default setting is “RF
LOW”. While the High setting normally provides maximum operating
range, the Low setting will help extend battery life. The Low setting
may also be preferred in multichannel systems, or when operating very
close to the receiver, to reduce the possibility of interference
or overload.
RF Interference
Please note that wireless frequencies are shared with other radio
services. According to Federal Communications Commission
regulations, “Wireless microphone operations are unprotected
from interference from other licensed operations in the band. If any
interference is received by any Government or non-Government
operation, the wireless microphone must cease operation...” If you
need assistance with operation or frequency selection, please contact
your dealer or Audio-Technica.
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, but no closer than three feet (1 m).
4. Avoid placing the receiver in a low or shielded location where the
transmitter and receiver antennas are not within line-of-sight. If
necessary, use remotely-located receiver antennas.
5. Avoid placing the receiver near computers or other RF generating
equipment.
6. The receiver and transmitter must be set to the same frequency.
7. A receiver cannot receive signals from two transmitters at the same time.
8. Do not obstruct the handheld transmitter’s antenna (located at the
base) or attached body-pack transmitter’s antenna with your hands.
9. You need to change frequencies 1) when a strong interference
signal is received, 2) when audio quality is poor due to weak RF, or
3) during multiple-system operation in order to select an
interference-free frequency.
10. Turn the transmitter off when not in use. Remove the batteries if the
transmitter is not to be used for a period of time.