Indicators And Controls - Azden 500UDR User Manual

Transmitter Descriptions:
51HT Handheld microphone transmitter with 63 on-board user selectable UHF
frequencies. Ideal for all vocal applications.
(1) To install batteries, turn the bottom half of the mic case counter-clockwise until it
is completely off.
(2) Insert two fresh alkaline "AA" batteries into the compartment. Make sure battery
polarity is correct.
(3) Frequency selection is achieved using the group and channel knobs which allows
you to select any of seven frequency groups (numbered from 0-6) and any of nine
frequency channels (numbered 0-8) within the selected group. After selecting the
desire frequency, replace bottom half of microphone case and turn clockwise until
snug. DO NOT OVER TIGHTEN.
(4) 2-Position switch
The bottom position is "Off" and the top position is "On". Turning the transmitter Off
will cause the receiver to mute due to the tone squelch circuitry at the receiver. This
allows the mic to be handled with no noise.
(5) LED Indicator turns green when turned on. This LED will also turn red to indicate
that the battery level is low and the batteries must be changed.
(6) The antenna attaches to the bottom of the microphone. It is screwed on clockwise
and should be snug.
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INDICATORS AND CONTROLS

A. LED Indicators (#3):
1. A/B ANT - depending upon which antenna is receiving the stronger signal, the A
or B ANT LED will glow green when both the transmitter and receiver are turned
ON and adjusted to the same frequency. Occasional rapid changing of the two
LEDs is a normal indication of the diversity front-end working to reduce multipath
distortion.
2. AF PEAK - this indicator (#12) lights only when the receiver's input level from the
transmitter exceeds unity. If the LED lights and there is no audible distortion no
adjustment is needed. If, on the other hand, the LED illuminates and there is
audible distortion, reduce the output from the microphone/transmitter by either
moving the microphone further from the sound source or in some other way re-
duce the output signal from the microphone/transmitter.
3. POWER - with fresh batteries, this LED (#4A) lights red when the power switch
(#4)is turned ON. When the battery level drops to 4 volts this LED will flash on and
off. When this happens it is time to replace the batteries.
B. Controls:
1. POWER SWITCH (#4) - turns the 500UDR ON and OFF as indicated.
2. MONITOR (#5) - this level control adjusts the receiver's earphone monitor vol-
ume. As indicated, turn clockwise to increase and counterclockwise to decrease
the earphone volume.
FREQUENCY SELECTION
3. GROUP (#6) - using the supplied screwdriver tool, rotate this switch to select one
of the seven (7) frequency groups (0-6). Note: positions 7-9 do not apply.
4. CHANNEL (#7) - using the supplied screwdriver tool, rotate this switch to select
one of the NINE (9) frequency channels (0-8). Note: position 9 does not apply.
This method of group/channel selection provides 63 possible choices. ANY transmit-
ter that is to be used with this 500UDR MUST be adjusted to the same group/channel
combination.
When using multiple systems, all receivers and transmitters MUST use the same
GROUP number to avoid intermodulation distortion. Additionally, all receivers and trans-
mitters MUST use different CHANNEL numbers.
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