Azden UHF Performance Series User manual

UHF PERFORMANCE SERIES
TRUE DIVERSITY SYSTEMS
AZDEN CORPORATION
147 New Hyde Park Road
Franklin Square, NY 11010
516.328.7500 vox  516.328.7506 fax
[email protected]  www.azdencorp.com
OWNERS MANUAL
411UDR  411DRH
41HT  41HT3  41XT  41BT

Thank you for purchasing AZDENS PERFORMANCE SERIES wireless system. UHF wireless
systems yield a better signal to noise ratio and improved frequency response over VHF systems. The
UHF band is less crowded than VHF thus giving you less likelihood of interference. This manual covers
the 411UDR and 411DRH receivers and the 41BT, 41XT and 41HT transmitters.
Receiver Descriptions: The 411UDR and 411DRH are crystal controlled, PLL synthesized receivers with 63
on-board user selectable frequencies with a range of 794MHz to approx. 806MHz. They are true diversity,
containing two separate receivers, each operating on the same frequency. The transmitters output signal is
monitored constantly by a diversity circuit, which switches automatically to the receiver with the stronger RF
signal. This allows wireless performance that is virtually drop-out free, even under the most adverse condi-
tions. Both receivers feature a 1/4-inch and XLR output jacks and volume adjustment.
(1) Power LED and on/off switch (411DRH only)
After plugging in the 411DRH, depress the on/off switch to turn unit on and illuminate the Power LED.
The 411DRs Power LED will illuminate as soon as the unit is plugged in.
(2) Antenna A-B LEDs
When the transmitter is turned on and is in reception range of the receiver, either the A or B LED will light up
RED, depending on which receiver circuit is getting the strongest signal from the transmitter. Flickering
between the A and B LED is a normal function of the system.
(3) Peak LED
These will flash if the audio component of the incoming signal is approaching distortion. The 411DRH has a 7
segment LED display to show the incoming audio signal from -20 to + 6 dB.
(4) Antennas, antenna connections
On both the 411UDR and 411DRH, position the antennas vertically for best reception. On the 411UDR, when
not in use put the antennas in the holder to avoid damage. On the 411DRH the antennas are connector
mounted (BNC) so that the supplied antennas can be disconnected and/or removed.
(1)
15678109
41234

(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 411DRHs 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.
(2)
HR-1

The following feature is for the 411DRH 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 counter-clockwise 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.
To change the frequency that a transmitter, receiver pair is already on
YOU MUST TURN OFF BOTH TRANSMITTER AND RECEIVER OFF FIRST!
System #1
Group Channel
System #2
Group Channel
System #3
Group Channel
System #4
Group Channel
Receivers 2 4 25 26 27
Transmitters 2 4 25 26 27
(3)
HR-2

Transmitter Descriptions:
41HT Handheld microphone transmitter with 63 on-board user selectable UHF frequencies. Ideal for all vocal
applications. The 41HT3 is identical in RF performance. It features an Audix microphone element.
(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 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.
(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)
6

41BT body-pack transmitter with 63 on-board user selectable UHF frequencies. Ideal for use with lavaliere
and headset microphones. The MP-1 instrument cable will also allow you to use the 41BT with electric guitars
and basses. Please note: For use with instruments the gain structure of the 41BT must me modified at the
factory.
(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 allows you to select any of seven frequency groups (numbered from0-6). The channel knob
allows you to select nine frequency channels (numbered 0-8) within the selected group.
(4) 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 due to the tone squelch circuitry at the receiver. This allows the microphone to be handled with no noise.
(5) LED Indicator turns green when turned on. This LED will also turn red to indicate that battery level is low
and the battery must be changed.
(6) Audio input Level Control enables you to adjust the input level of the microphone or musical instrument.
Turn clockwise to increase, or counter-clockwise to decrease the input level. A small screwdriver is supplied
to make these adjustments. The level control is factory-preset in the center position.
(5)

41XT 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.
(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 and Off switch enables and disables all transmitter functions while the Audio switch On
and Off turn just the transmitters Audio signal on and off. Switching the Audio to Off will cause the
receiver to mute due to the tone squelch circuitry in the receiver. This allows the microphone to be handled
with no noise.
(5) Audio input LEVEL control
This enables you to adjust the input level of the microphone. Turn clockwise to increase, or counter-clockwise
to decrease the input level. A small screwdriver is supplied to make adjustments.
(6)

(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 41XT onto a microphone (low impeadance with XRL connector) first make certain the the
locking-ring is turned fully up (rotate counter-clockwise). Then plug the 41XT fully into the microphones
XLR connector and tighen 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 (1/4 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)

41BT 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.
41BT with Instrument cable for electric guitars or basses (MP-1):
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 (6) on the
transmitter.
41XT: 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.
41HT:
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.
(8)

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
41BT Transmitter:
Type of Emission: FM
Antenna: External Antenna
Pre-emphasis: 50 ms
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-1)
Audio Adj Range: m/2
Battery: 9V
Battery Life: 6 to 8 hours with Alkaline Battery
Dimensions: 100(H) 62(W) 22(D) mm
Weight: 92g (without battery)
(9)
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.

41HT/41HT3 Transmitter:
Type of Emission: FM
Antenna: Internal Antenna
Microphone Unit: Unidirectional Dynamic
RF Output Power: 10m W (50mW MAX)
Input Impedance: 8K
Audio adj Range: m/2
Battery:2 1.5V (AA)
Battery Life: 6 to 8 Hours with Alkaline Battery
Dimensions: 56(D) 242(L) mm
Weight: 250g (without battery)
41XT Transmitter:
Type of Emission: FM
Antenna: Internal Antenna
Pre-emphasis: 50 ms
MAX Input Level: -7dBm
Microphone Unit: Dynamic Microphones
RF Output Power: 15mW (50mW MAX)
Input Impedance: 6K
Audio Adj Range: m/2
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
GRP0123456 7 8
0 794.500 795.750 797.750 798.000 799.500 800.500 802.375 804.7850 805.875
1 794.375 795.625 797.625 797.875 799.375 800.375 802.250 804.625 805.750
2 793.750 795.000 797.000 797.250 798.750 799.750 801.625 804.000 805.125
3 794.250 795.500 797.500 797.750 799.250 800.250 802.125 804.500 805.625
4 794.125 795.375 797.375 797.625 799.250 800.125 802.000 804.375 805.500
5 794.000 795.250 797.250 797.500 799.000 800.000 801.875 804.250 805.375
6 793.875 795.125 797.125 797.375 798.875 799.875 801.750 804.125 805.250
(10)