System Operation
Switch on the receiver. Do not switch on the transmitter yet.
Selecting/Setting Frequency
Selection of the desir
ed operating frequency is made through
the function menus. It’s usually best to start by setting the
receiver’s frequency, to determine there is no local interference
on that frequency. Then, always make certain to set the trans-
mitter to the receiver’s
exact frequency. The receiver’s unique
Digital Tone Lock system squelches the audio only, permitting
any RF energy on the frequency to show on the
“RF”
bar-meter.
Note: It’s often convenient to start with the factory-default
fr
equency, if there is no TV station on Channel 25 (for Band C
systems) or Channel 44 (for Band D systems).
Receiver On…
The Alert indicator and the LCD window will light up; the
normal-operation LCD display will appear after 1-2 seconds (Fig.
D-1). If any of the bars show in the
“RF” bar-graph meter, there
may be RF interference in the area. If this occurs, select another
fr
equency as explained below. (If the Meter Hold function has
been selected, one of the RF bars will be flashing, indicating
the lowest RF level received.)
Setting Receiver Frequency
1. Press the Mode/Set button once; then only the frequency
will appear in the LCD window. (The receiver is now in the
Menu mode.) See Figure D-2.
2. Press the Mode/Set button again; the Alert light will come
on and the frequency in the window will flash. (The receiver
is now in the Edit mode, Fig. D-3.)
3. Use the Up/Down arrow buttons to change the frequency.
Press either arrow for single steps, or hold down either
arrow for rapid cycling through the band. Frequencies
“wrap around” to the other end of the range when the top
or bottom of the band is reached. Choose a frequency
appropriate for your area, avoiding frequencies with active
TV channels. (See the frequency listings on page 12.)
4. To activate this frequency selection,
press and hold the
Mode/Set button until the word
“STORED” appears in the
receiver’s window. (If you do not wish to complete this
par
ticular selection, just pr
ess the Mode/Set button
once.
The word “ESCAPE” will appear briefly in the window and
the receiver will return to the Menu mode.)
5. When finished entering a frequency, press the Down arrow
button
once to move to “QUIT”. Then pr
ess the Mode/Set
button
once to exit the menu. The “RF” and “AF” scales
will reappear in the window, indicating the return to normal
operation.
Transmitter On…
Turn on the transmitter by pressing and holding the Power/Mute
button (Fig. E/F) for a second or two, until the red power
indicator and the LCD window have come on.
Setting T
ransmitter Fr
equency
1. Press the Set button once and the small word “MENU” will
appear above the frequency. Press the Set button again
and the small
flashing word “EDIT” will appear to the right
of
“MENU”. See Figures J-3 and J-4.
2. Use the Up/Down arrow buttons to change the transmitter
frequency. Press either arrow for single steps, or hold down
either ar
row for rapid cycling through the range.
Fr
equencies “wrap around” when the top or bottom of the
band is r
eached. Select the
exact fr
equency displayed on
the receiver.
3. 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 briefly in the window and the
transmitter will return to the Menu mode.)
4. When finished entering a frequency, press the Up arrow
button
once to move to “QUIT”. Then press the Set button
once to exit the menu. The wor
d
“MENU” in the transmit-
ter 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 five or more,
of the RF indicators should be displayed.
Setting Levels
Correct adjustment of transmitter audio input, receiver audio
output, and mixer/amplifier input and output levels is important
for optimum system performance.
Set Transmitter Audio Input Level
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 setting 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”); watch the receiver’s “AF” bar-graph “+3/+6” indications
and the Alert light, to make certain that they are not triggered
by the highest audio levels.
The transmitter’s normally-on red LED power indicator will blink
of
f
if the peak audio input exceeds the maximum desirable
level.
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 nor
mally pr
ovides
maximum operating range, the Low setting will help extend
battery life. The Low setting may also be preferred in multi-
channel systems, or when operating ver
y close to the r
eceiver
,
to r
educe the possibility of inter
fer
ence or overload.
RF Interference
Please note that wireless frequencies are shared with other
radio services. According to Federal Communications
Commission r
egulations, “W
ir
eless microphone operations are
unprotected from interference from other licensed operations in
the band. If any interference is received by any Government or
non-Gover
nment operation, the wir
eless micr
ophone must
cease operation...”
If you need assistance with operation or frequency selection,
please contact your dealer or the Audio-Technica professional
division. Extensive wireless information also is available on the
Audio-T
echnica W
eb site at www
.audio-technica.com.
9
See pages 16-17 for illustrations.
