Lectrosonics R185 - Manual (Page 5)

RECEIVER FRONT PANEL
MODULATION INDICATORS Nine (9) LEDs indicate the audio level (modulation) of the incoming signal, which are
typically used for proper adjustment of the transmitter’s "MIC LEVEL" or "GAIN." The left-most LED (red) functions
as a pilot lamp to indicate that the receiver is powered up. The seven green LEDs indicate the modulation level of
the signal. The right-most yellow LED indicates maximum modulation and that the transmitter audio input is
probably being driven into limiting.
OFF/MUTE/ON This switch turns the receiver power off and on and selects either an "audio mute" or "audio on"
operation. The "audio mute" position is normally used to cut the audio output from the receiver so that the
modulation LEDs may be observed while adjusting the transmitter gain.
RF INDICATOR This LED glows when the transmitter is turned on and the receiver has a useable RF signal.
When the carrier signal from the transmitter is too weak to produce a clean audio signal, the lamp will go out.
OUTPUT ATTENUATOR This control knob adjusts the output level of the two balanced outputs on the rear panel
(XLR and 1/4"). In a fully clock-wise position, the output at the XLR jack will be 100mV when the signal is at full
modulation. The "-3," "-12dB", "-20", and "-50" markings indicate the knob position that will lower the audio output
by that amount. In other words, with the OUTPUT ATTENUATOR knob in the "-12dB" position, the audio output
level at the XLR jack will be 12 dB below 100mV when the signal is at full modulation. These markings should not
be confused with absolute level references such as "-20 dBm", "-20 dBu", etc.
-24 -12 -20 -15 -7 -3 -12dB 0 +3
-50
-20 -3
0dB
L
N
R
M
A
O
LECTROSONICS
POWER
RF
dB AUDIO LEVEL
OFF ON
AUDIO
MUTE
OUTPUT
ATTENUATOR
Figure 3 - R185 Front Panel
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