Lectrosonics R33 User Manual download pdf (Page 11)

Professional Wireless System

7. SYSTEM SETUP AND OPERATION

The following steps should be done in order. If you have any problems with the system, make sure all these steps

were done correctly.

A. If you are using the whip antenna that is provided with the R33 receiver, insert the threaded end of the antenna into

the hole on top of the receiver and turn it gently clockwise until it is seated. Pull lightly on the antenna to fully

extend it but don’t lift the receiver by the antenna.

B. Try to locate the R33 receiver on stage as close to the performer as is reasonable. Choose a location that allows

you to extend the antenna fully. Metal surfaces under the receiver such as a table or amp rack are no problem but

large metal surfaces next to the antenna may interfere with the reception. You may want to locate the R33 so that

the LEDs are visible to the sound system operator.

C. Connect the appropriate output, connect the power supply and move the OFF-MUTE-ON switch to the MUTE

position. The red POWER indicator should light.

D. Plug the mic or instrument into the M33 transmitter and turn the M33 on. The red battery indicator on the side of the

M33 should blink on once. If the indicator continues to blink or stays on, change the battery. When the transmitter

is turned on, the green RF indicator on the front of the R33 should light.

E. The performer should now sing into the attached microphone or play the connected instrument at full level. It is

common to play or sing louder during a performance than at a sound check.You may want to take this into consid-

eration during the setup. Adjust the gain of the M33 transmitter using the small plastic screwdriver that is provided.

(See figure 1 for the GAIN control location.) The transmitter gain should be adjusted until the red MOD LEVEL lamp

blinks occasionally on the loudest audio peaks.

1. A dim green MOD LEVEL lamp indicates the transmitter gain is low. Turn the transmitter gain control gently

clockwise until the red LED blinks on the loudest audio peaks.

2. A red MOD LEVEL lamp that is lit at medium audio levels, or very frequently, indicates that the transmitter gain

is too high. The gain should be reduced by turning the gain control on the M33 transmitter gently counterclock-

wise.

Excessive gain may not be audible even on signal peaks since the system is designed to go into compression

and, if all else fails, overload “gracefully”. However, the resulting compression may restrict the performer’s

dynamic range and can cause feedback.

Inadequate gain may not be audible because the system has one of the widest dynamic ranges available today.

However, too low a gain setting may result in a poor signal-to-noise ratio and be audible under extreme condi-

tions such as very quiet rooms or in recording sessions.

If it is impossible to make a sound check in order to adjust the transmitter gain, simply set the gain control all

the way counterclockwise (minimum gain). In most cases this will work adequately.

F. Now that the M33 transmitter gain is set, the R33 receiver OFF-MUTE-ON switch can be switched to the ON

position. This will turn on the R33 audio outputs.Your sound system can now be adjusted for the desired audio

level. Normally the VOLUME control on the R33 is set at 0 dB (maximum output). If this is too much signal for your

system, then set the VOLUME control to the appropriate level.

DO NOT USE THE GAIN CONTROL ON THE TRANSMITTER TO SET THE VOLUME OF THE SOUND SYSTEM.

IT IS ONLY USED TO SET THE MODULATION LEVEL AS OUTLINED IN STEP E ABOVE.

G. With the system on, walk around the area where the transmitter will be used. Sing into the microphone or play the

instrument. Check the operation of the system, making sure that the receiver is receiving a good signal (the green

RF light should stay on steadily). In the rare case that the signal is lost as you go through a “dead spot”, try moving

the receiver antenna to a different location.

Rio Rancho, NM – USA

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Lectrosonics R33 User Manual Page 11

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