PERFORMANCE SERIES
UHFTRUE DIVERSITY SYSTEMS
OWNER’S MANUAL
411UDR • 511DRH
51HT • 51XT • 51BT
AZDEN CORPORATION
147 New Hyde Park Road, P.O. Box 10
Franklin Square, NY 11010
516.328.7500 vox • 516.328.7506 fax
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(5) 12 Volt Input
Plug the supplied AC adapter into the 12 volt input on the receiver then into an AC electrical outlet. Use only
the adapter supplied, as other adapters may damage the receiver.
(6) Output Adjustment
Rotate this knob clockwise to increase, or counterclockwise to decrease volume level.
(7) Output (unbalanced)
Using a suitable audio cable (not supplied) connect the 1/4-inch phone jack end to the audio output on the
receiver, and connect the other end of the cable to the suitable mic/line input of an audio mixer or amplifier.
(8) Output (balanced)
Using a suitable audio cable (not supplied) connect the XLR connector to the audio output on the receiver, and
connect the other end of the cable to the suitable mic/line input of an audio mixer or amplifier.
(9) & (10) Frequency select
The group knob (9) allows you to select any of seven frequency groups (numbered from 0-6). The channel
knob (10) allows you to select any of nine frequency channels (numbered 0-8) within the selected group. Any
receiver/transmitter pair must be on the same group and frequency to operate properly. Be sure that both the
transmitter and the receiver are OFF before selecting/changing the frequency.
When using more than one system, all receivers and transmitters must be set to the same group to avoid
intermodulation distortion while all transmitter/receiver pair must be on different frequencies.
(11) Rack ears
If you wish to use one or two of the 511DRH in a standard 19" rack you must attach the rack ears (HR-1 or
HR-2 – purchased separately) by attaching the ears with the four machine screws (two per side near front).
The HR-2 also requires the attachment of a joining plate underneath the two units.
HR-1
(2)
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HR-2
The following feature is for the 511DRH only.
(12) Squelch adjust
This adjusts the point at which the receiver will shut off or “squelch” the incoming radio signal when it
becomes too weak. Turning the control clockwise raises the threshold, allowing more signal to enter, and
turning the control counterclockwise lowers the threshold, letting in less signal.
When operating multiple systems all receivers and transmitters must be on the same group
Example: 4 systems operating simultaneously.
System #1
System #2
System #3
System #4
Group Channel Group Channel Group Channel Group Channel
Receivers
2
2
4
4
2
2
5
5
2
2
6
6
2
2
7
7
Transmitters
To change the frequency that a transmitter, receiver pair is already on
YOU MUST FIRST TURN OFF BOTH THE TRANSMITTER AND RECEIVER!
(3)
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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 counterclockwise until it is completely off.
(2) Insert two fresh alkaline “AA” batteries into the compartment. Make sure battery polarity is correct.
(3) Frequency select
The group knob allows you to select any of seven frequency groups (numbered from 0-6). The channel knob
allows you to select any of nine frequency channels (numbered 0-8) within the selected group.
Replace bottom half of microphone case and turn clockwise until snug. DO NOT OVER TIGHTEN.
6
(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.
(4)
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3
4
5
6
1
2
The 51BT body-pack transmitter has 63 user selectable UHF frequencies and is ideal for lavaliere and headset
microphones. The optional MP-1H instrument cable allows the 51BT to work with electric guitars and basses.
(1) Open the battery compartment lid by sliding it down and raising it.
(2) Insert one fresh alkaline 9-volt battery into the compartment. Make sure battery polarity is correct.
(3) Frequency select:
The group knob (left) allows you to select any of seven frequency groups (numbered from 0-6). The channel
knob (right) allows you to select nine frequency channels (numbered 0-8) within the selected group. Use the
flat end of the provided tool to adjust these settings.
(4) Audio input Level Control:
Enables you to adjust the input level of the microphone or musical instrument. Turn clockwise to increase, or
counterclockwise to decrease the input level. Use the + end of the provided tool to adjust this setting. The
level control is factory-preset in the center position.
(5) Power and standby switches:
The power “On” and “Off” switch enables and disables all transmitter functions while the audio switch “On”
and “Standby” turn the audio off and on. Switching the transmitter to “Standby” will cause the receiver to
mute using the tone squelch circuitry in the receiver. This allows the microphone to be handled with no noise.
(6) LED Indicator:
Turns green when the transmitter is turned on. This LED will also turn red to indicate that battery level is low
and the battery must be changed.
(5)
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51XT plug-in XLR transmitter with 63 on-board user selectable UHF frequencies. Ideal for use with dynamic
microphones with XLR output.
(1) Open the battery compartment lid by sliding it down and raising it
(2) Insert one fresh alkaline 9-volt battery into the compartment. Make sure battery polarity is correct.
4
3
4
5
6
(3) Frequency select
The group knob allows you to select any of seven frequency groups (numbered from 0-6). The channel knob
allows you to select any of nine frequency channels (numbered from 0-8) within the selected group.
(4) Power and Audio switches
The power “On/Off” switch enables and disables all transmitter functions while the Audio “On/Off” switch
turns just the transmitter’s Audio signal on and off. Switching the Audio to “Off” will cause the receiver to
mute using the tone squelch circuitry in the receiver. This allows the microphone to be handled with no noise.
The “Phantom” switch allows the 51XT to provide 5V to power electret condenser microphones.
(5) Audio input LEVEL control
This enables you to adjust the input level of the microphone. Turn clockwise to increase, or counterclockwise
to decrease the input level. A small screwdriver is supplied to make adjustments.
(6)
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(6) LED INDICATORS
The POWER LED turns green when power is turned “On” or red if battery level is low. If this LED lights up
red replace the battery.
The AF PEAK LED lights up if the input level is set to high, indicating the onset of distortion. Lower the
input level so that the AF PEAK LED lights only occasionally.
To plug the 51XT onto a microphone (low impedance with XRL connector) first make certain the locking-ring
is turned fully up (rotate counterclockwise). Then plug the 51XT fully into the microphones XLR connector
and tighten by rotating the ring fully down (clockwise).
OPERATING THE SYSTEM:
Because this a frequency agile system, meaning that you choose the frequency of both the transmitter and
receiver via the group and channel controls, we cannot stress enough that any transmitter/receiver pair that you
want to transmit and receive on MUST BE SET TO THE SAME FREQUENCY!
Additionally, multiple systems used in the same proximity must ALL BE ON THE SAME GROUP SELEC-
TION! To change the frequency that a transmitter/receiver pair is already on YOU MUST TURN OFF BOTH
TRANSMITTER AND RECEIVER FIRST!
Do not place the receiver on a metal surface, and avoid obstructions between the receiver and transmitter,
since this could degrade the performance of the equipment.
First, make sure that the power to all your components is turned off. Connect an audio cable from the output of
the receiver (phone jack or XLR) to a mic/line input on your audio mixer or amplifier. Plug the receiver’s AC
adapter into the 12V input jack on the receiver and then plug it into the AC electrical outlet. With the volume
of your mixer or amplifier set to minimum level, turn your system’s power on. Turn on the transmitter(s).
Make sure all LEDs on the receiver(s) and transmitter(s) are operating as described in the preceding pages.
Now set the receivers volume to the midway point and adjust the volume level on your mixer or amplifier.
(7)
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51BT with Lavaliere or Headset:
With someone talking into the microphone, turn the volume on the mixer or amplifier to the desired level. If
there is too much, or not enough gain, lower or raise the volume on the receiver. If the sound is distorted,
lower the input gain on the transmitter.
51BT with Instrument cable for electric guitars or basses (MP-1H):
Plug the cable into the guitar or bass. Set the instrument volume to the midway point. While playing the
instrument, turn the volume on the mixer or amplifier to the desired level. If there is too much, or not enough
gain, lower or raise the volume on the receiver. If the sound is distorted, lower the input gain (4) on the
transmitter.
51XT: With someone talking into the microphone, turn the volume on the mixer or amplifier to the desired
level. If there is too much, or not enough gain, lower or raise the volume on the receiver. If the sound is
distorted, lower the input gain on the transmitter.
51HT:
With someone talking/singing into the microphone, turn the volume on the mixer/amplifier to the desired
level. If there is too much, or too little gain, adjust the volume on the receiver. If the sound is distorted, move
the microphone further away from the sound source. Make sure that the LED is green when the mic/transmit-
ter is turned On. When the battery is low, the LED turns red indicating that the battery needs to be changed.
NOTES:
- All “Performance Series” transmitters will work continuously for approximately 6-8 hours using an
alkaline battery.
- Remove the battery if the transmitter will not be used for a long period of time.
- Do not use or store the system in areas of high temperatures or humidity.
- Do not use this system near a broadcast station, airport, or airplanes, it may cause interference. If you
are interfering with other transmissions you must turn off the system.
- These systems contain no user serviceable parts. If unauthorized service is performed it may void the
warranty.
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Specifications
Overall:
Frequency Range: UHF 63 ch. (793-806MHz)
Frequency Response: 20Hz to 20kHz
Audio Distortion: less than 1%
Dynamic Range: better than 100dB
S/N Ratio: better than 95dB
Operating Temperatures: 0 to 45
Operating Range: 100m under ideal conditions
Oscillator: PLL synthesized
Tone Squelch Frequency: 32.768kHz
Diversity Type: True Space Diversity
51BT Transmitter:
Type of Emission: FM
Antenna: External Antenna
Pre-emphasis: 50 µs
MAX Input Level: -10dBm(Mic) +7dBm(MP-1)
Microphone Unit: Lav or Headset
RF Output Power: 15mW (50mW MAX)
Input Impedance: 2.2K (Mic) 680K (MP-1H)
Audio Adj Range: -65dBm ~ -37dBm
Battery: 9V
Battery Life: 6 to 8 hours with Alkaline Battery
Dimensions: 100(H) 64(W) 27(D) mm
Weight: 127.5g (without battery)
FCC Notes:
These systems conform to part 74 and part 15 of the FCC rules, and you should contact the FCC office for
filing forms.
(9)
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51HT Transmitter:
Type of Emission: FM
Antenna: Internal Antenna
Microphone Unit: Unidirectional Dynamic
RF Output Power: 10m W (50mW MAX)
Input Impedance: 8K
Battery:2 1.5V (AA)
Battery Life: 6 to 8 Hours with Alkaline Battery
Dimensions: 56(D) 242(L) mm
Weight: 250g (without battery)
51XT Transmitter:
Type of Emission: FM
Antenna: Internal Antenna
Pre-emphasis: 50 µs
MAX Input Level: -7dBm
Microphone Unit: Dynamic Microphones
RF Output Power: 15mW (50mW MAX)
Input Impedance: 6K
Audio Adj Range: -63dBm ~ -18dBm
Battery: 9V
Battery Life: 6 to 8 hours with Alkaline Battery
Dimensions: 40 x 40 x 99(L) mm
Weight: 152g (without battery)
UHF FREQUENCY CHART
C H A N N E L
4
GRP
0
1
2
3
5
6
7
8
0
1
2
3
4
5
6
794.500
794.375
793.750
794.250
794.125
794.000
793.875
795.750
795.625
795.000
795.500
795.375
795.250
795.125
797.750
797.625
797.000
797.500
797.375
797.250
797.125
798.000
797.875
797.250
797.750
797.625
797.500
797.375
799.500
799.375
798.750
799.250
799.250
799.000
798.875
800.500
800.375
799.750
800.250
800.125
800.000
799.875
802.375
802.250
801.625
802.125
802.000
801.875
801.750
804.7850
804.625
804.000
804.500
804.375
804.250
804.125
805.875
805.750
805.125
805.625
805.500
805.375
805.250
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