Lectrosonics DR185 Manuel d'utilisateur télécharger pdf (Page 4)

FRONT PANEL CONTROLS AND FUNCTIONS

MODULATION INDICATORS

Nine (9) LEDs indicate the audio level (modulation) of the incoming signal, which are typically used for proper adjust-

ment of the transmitter’s “MIC LEVEL” or “GAIN”. The leftmost 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 rightmost yellow LED

indicates maximum modulation and that the transmitter audio input may be “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 while observing the modulation LEDs to

adjust the transmitter gain.

RF INDICATOR

Two LEDs are provided to indicate the status of each receiver in the DR185. These LEDs glow when the transmitter

is turned on and the receiver has a good RF signal. When the carrier signal from the transmitter is too weak to

produce a clean audio signal, the lamp will go out.

OPTI-BLEND LEDs

The audio outputs of two separate receivers are mixed together in a “ratio” that is regulated by comparing the signal

to noise ratios in the two receivers. The mixture ratio of the two audio signals is indicated on the front panel by two

LEDs that vary in brightness. As a build-up of noise occurs in one receiver, the corresponding LED for that receiver

dims or goes out as the circuitry pans to the other receiver. Since the mixture ratio of the two audio signals is deter-

mined by a comparison of their signal to noise ratios, the “blending” action occurs regardless of how strong (or weak)

the incoming RF signals are. This is the distinct advantage of this receiver design over any other type of diversity

system available.

OUTPUT ATTENUATOR

This control knob adjusts the output levels 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 a full modulation. The “-3,” “-12dB”

and “-20” markings indicate the knob position that will lower the audio output by the “dB” amount on the markings

around the knob.

-50

-20

-12dB

-3

-24 -20 -15 -12 -7 -3 0 +3

OFF ON

AUDIO

MUTE

A B

OPTI

BLEND

OUTPUT

ATTENUATOR

A B

dB AUDIO LEVEL

0dB

POWER

LECTROSONICS

DIVERSITY RECEIVER

DR185

DR185 Front Panel

1 2 3 4 5 6 7 8 9 10 11 12

Commentaires sur ces manuels

Pas de commentaire

Lectrosonics DR185 Manuel d'utilisateur Page 4

Commentaires sur ces manuels

Produits connexes et manuels pour Équipement Lectrosonics DR185