Lectrosonics QUADUHFD - Manual (Page 6)

RECEIVER INSTALLATION
The QUADUHFD is designed to contain up to four receivers. Installation of these receivers is quite simple. First,
loosen but do not remove, the two large counter-sunk phillips head screws in the front panel and the two in the rear
panel of the housing. (See drawings on previous pages) Insert the receivers, front end first (the end with the an­
tenna connection), in through the rear panel. Seat the front end of the receiver into the recessed lip of the front
panel. Repeat this for each receiver to be installed. After all receivers are in place, hold them in postion and tighten
the front panel screws first. These screws should be fairly snug but excessive force should be avoided and is unnec­
essary. You are compressing a natural rubber tension tube. Tighten the rear panel screws last. Press firmly on the
front of each receiver to be certain that the receivers are secure.
At the front panel, attach the antenna leads to each receiver, making sure the BNC connector is securely locked into
place. Set the power switch on the receivers to the EXT position. Antenna leads serving empty slots do not need to
be terminated.
At the rear panel, insert the power connectors into the power jack of each receiver. If using battery powered receiv­
ers it is recommended that each receiver have a fresh battery in place to serve as backup power in the event that the
internal battery pack or external power source fails for any reason.
OPERATING INSTRUCTIONS
After all the receivers have been installed, check to be sure that the receivers have their power switch set to EXT.
Audio leads should be balanced audio cables leading to the mixer or recorder.
Turn the system on by switching the power switch on the distribution module to EXT or EXT OR BAT. The EXT
position will allow the QUADUHFD to operate ONLY on external power no matter what the external voltage is. If the
voltage of the external power source (not the charger) drops below operational levels, then the system may not
operate. The EXT OR BAT position allows use of an external power source until that source drops below 9V. The
system then switches automatically to the internal batteris of the QUADUHFD. The Charger is not an external power
source in this sense because the charger and the battery are the same buss as far as the UDM6 is concerned. The
power indicator LEDs should light on all the receivers and the distribution modules. If the charger is connected and
plugged into an AC source, the AC and perhaps the CHARGE LEDs will be on as well. If the power source is an
external 12 VDC power supply, the EXT LED will be on.
Operate the wireless microphone according to the instructions included with the wireless systems.
After use, recharge the batteries immediately to prolong their life. The system incorporates industrial quality gel-cells
which can be left on charge 10 days at a time without damage. The charging circuitry will automatically limit the
current flow to the batteries. There are no “memory” problems with these batteries. Charge after every use for
maximum battery life. The CHARGE LED will activate to indicate the batteries are charging and will extinguish
when the batteries are at full charge. The charge rate is 3.5Amps for abut 3 hours falling to a rate of 1 Amp. When
the charge rate drops to 1 Amp, the green LED will reduce brightness to 1/2 and the battery voltage will be 13.8V.
At approximately 16 hours, the unit will acheived full charge. It may be left on charge for a few days without damage
although we do not recommend leaving the system on charge continuously. Important - this unit will achieve an
operational level of charge after 3 hours from a totally dead battery.
The red BAT led will go out when voltage drops to 11.5 volts - approximately 10% battery capacity remains at that
point.
The external 12 VDC power supply may be connected to the system through the 4 pin XLR connector on the rear
panel. The connection is made by supplying the voltage through pins 1 and 4. Pin 1 is negative or ground, pin 4 is
+12V DC.. Polarity is noted on the housing.
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