Lectrosonics UDR195 User Manual download pdf (Page 13)

Wireless Diversity Receiver

INSTALLATION AND OPERATING INSTRUCTIONS

1) If operating the unit from AC power, determine the line voltage to be used and set the Line Voltage Selector on the rear panel

to match. The units are shipped with the proper size fuse for use with 120V systems (315mA). If the unit will be used in a

220V environment, change the fuse to a 160mA of the same type. See the section "DR195 Replacement Parts and Accesso-

ries" for manufacturer part numbers of the correct type and value for 110 and 220 Volt supplies.

2) Locate a suitable operating location where the DR195 will not be subjected to extreme temperature variations and possible

bumps and drops. Try to route all wiring so it will not cross walkways or isles.

3) Connect the power. For 120V AC operation, connect the power cord to the AC input jack on the rear panel and plug the other

end into a suitable electrical outlet. If 12 to 18 Volts DC operation is desired, a power cord will need to be fabricated. Use a

standard A4M XLR connector for the DR195 end and wire the 12 to 18 VDC to pins 1 and 4. The DR195 will operate with

either polarity. Make the length of the DC cable long enough to suit your installation and prepare and connect the source end

of the cable.

4) Attach the antenna cables to the BNC jacks on the rear of the DR195 and place the antennas. Best performance will be

obtained if the antennas are placed at least 3 feet from each other. Try to mount them as high as possible with a direct line of

sight path to the transmitter.

5) Set the Audio Output level control to minimum (CCW) and connect the Audio Output XLR jack to the mixer input. Pins 2

and 3 of the XLR jack are HI and LO and can be reversed with the Phase switch, pin 1 is common.

6) Preset the following controls: MODE (front panel) to DIVERSITY

MONITOR (front panel) to minimum (CCW)

PHASE (rear panel) to UP

VU METER HEADROOM (rear panel) to 0

AUDIO OUTPUT (rear panel) to -40 (full CCW)

7) Turn the unit on with the front panel Power switch and check to see that the red Pilot LED is off (be sure the transmitter is

turned off.) The VU meter will be lit only when the unit is operated from 120 VAC.

8) Turn on the transmitter and adjust the transmitter gain. THIS IS PERHAPS THE MOST IMPORTANT STEP IN THE SET

UP PROCEDURE. Adjust the transmitter so that voice peaks will light the 0 LED on the DR195 front panel Transmitter

Audio Level dB strip. The red LIM LED may flash occasionally. This is normal but it should not happen very often. See

your transmitter manual (Operating Instructions section) for specific directions on how to adjust the gain of your particular

transmitter.

9) After adjusting the transmitter gain, set the rear panel Audio Output level control to the desired level. The -40 setting is

approximately equal to 10mV, the 0 position will give 0.775VRMS, and the +15 setting will allow up to 4.4 VRMS. This

setting will depend on the requirements of your system.

10) Operate the system and re-adjust the receiver output level as required for your equipment. The input levels on different

VCR’s and PA equipment vary, which may require that you set the OUTPUT ATTENUATOR control in an intermediate

position. Try different settings and listen to the results. If the output of the receiver is too high, you may hear distortion or a

loss of the natural dynamics of the audio signal. If the output is too low, you may hear steady noise (hiss) along with the

audio.

11) Once the transmitter and Audio Output level has been set, you may adjust the VU Meter Headroom on the rear panel so the

analog VU meter will swing to 0 on normal audio peaks. The Headroom control is calibrated 0 to 20 dB in 5 dB steps so it is

always possible to know what the VU meter is actually measuring. For instance, if the VU meter is indicating 0 with a steady

state audio tone and the Headroom control is set to "5", the audio output is -5 dBu. The Headroom switch actually adjusts the

sensitivity of the VU meter by a calibrated amount. Without it, the VU meter would not deflect at all if the Audio Output was

set to a low setting such as –30.

Rio Rancho, NM – USA

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Lectrosonics UDR195 User Manual Page 13

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