Chord UH1 User manual

UHF Wireless Microphone System
(UH1, UH2, UN1, UN2, UHN2, UL1)
User Manual
Features:
UHF wireless system
Auto-mute on signal drop
Wide frequency response
Operates using AA batteries

Introduction:
Thank you for choosing the Chord UHF-series wireless system. This professional wireless set provides a high quality microphone with UHF radio system
for freedom of movement without loss of audio quality. Please read this manual before using this equipment in order to avoid damage through incorrect
operation and to get the best performance from your purchase.
Contents:
Please take care when unpacking this product. Inspect for any damage and ensure you have the following components…
UHF wireless receiver
Mains power adapter
6.3mm mono jack lead
2 x 1.5V AA battery (4 pieces for UH2, UN2 or UHN2)
Microphone / transmitter(s) –see table below
Model
Stock code
Microphone 1
Microphone 2
UH1
171.822 / 171.823
Handheld transmitter
-
UH2
171.825 / 171.826
Handheld transmitter
Handheld transmitter
UN1
171.838 / 171.839
Neckband mic. + bodypack
-
UN2
171.827 / 171.828
Neckband mic. + bodypack
Neckband mic. + bodypack
UHN2
171.820 / 171.821
Handheld transmitter
Neckband mic. + bodypack
UL1
171.846 / 171.847
Lavalier mic. + bodypack
-
Warning:
To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture.
If liquids are spilled on any component, stop using immediately, allow unit to dry out and have checked by qualified personnel before further use.
Avoid impact or heavy vibration to any of the components, dropping the microphone can cause capsule failure.
No user serviceable parts inside transmitter or receiver - refer servicing to qualified service personnel.
Safety
Ensure that the correct adapter is used with adequate current rating and that the mains voltage is as stated on the adapter.
Avoid ingress of water or particles into the transmitter(s) or receiver
Use alkaline or NiMH batteries in the transmitter(s) and remove if unused for long periods.
Observe the correct polarity when replacing batteries
Placement
Keep all components out of direct sunlight and away from heat sources.
Do not place heavy objects on top of the receiver or transmitter(s)
If rack-mounting, secure the receiver to a 1U rack tray and do not place heavy equipment above the receiver.
Keep the transmitter(s) and receiver away from damp or dusty environments.
Cleaning
Use a soft cloth with a neutral detergent to clean the body of the microphone/transmitter and receiver.
Lightly damp sterile wipes may be used on the microphone grille for hygiene purposes
To avoid damage, do not use solvents to clean the components
Handheld Transmitter Beltpack Transmitter
1. Windshield
2. Slide switch –OFF/MUTE/ON
3. Battery compartment cover
1. UHF antenna
2. LED power indicator
3. Slide switch OFF/MUTE/ON
4. MIC input, threaded 3.5mm jack
5. Frequency label
6. GAIN ADJUST rotary
7. Battery compartment

Receiver Rear Panel
Receiver Front Panel
Operation
For handheld transmitters, insert the supplied 2 x AA batteries by carefully unscrewing the base to reveal the battery compartment inside the
microphone body, connect the batteries (ensure + and - are the correct way round for each cell) and carefully screw the base back on.
For beltpacks, squeeze down the clip in the centre of the front panel of the beltpack to unfasten the lower half, which hinges outwards to reveal
the battery compartment. Position the supplied 2 x AA batteries inside (ensure + and - are the correct way round for each) and then close the
battery compartment flap until clipped back into position.
Position the receiver within the best available line of sight to the transmitter(s) and connect the DC jack of the supplied power adapter to the
receiver and the plug-top to the mains outlet. Extend both antennae fully upwards and outwards slightly and switch the power on. Turn
microphone level(s) down on the receiver.
Note: for dual sets (with 2 transmitters), both microphones’ outputs will be mixed and fed to both balanced and unbalanced outputs.
Connect the jack or XLR (optional) lead to the receiver’s audio output connector, turn down the volume of any equipment (mixer, amplifier etc.)
that the signal will be fed into and then connect the jack or XLR to the equipment.
Warning! - take care not to point microphones towards speakers –this can cause damaging feedback (loud whistle or howling noise) –try to
point microphones away from the speaker cabinets.
Move the switch on the handheld or beltpack transmitter to the first notch (MUTE) –the LED should light momentarily. If the LED stays on, this is
indicating that the battery is low or discharged. Move on another notch (ON) and gradually increase the microphone level(s) on the receiver, then
increase the volume on the mixer or amplifier until the sound from the microphone can be heard through the equipment.
During use, it may be useful for the reception of the microphone to be muted for a short period of time (e.g. to avoid feedback when walking
across the front of a speaker or avoid handling noise when placing the microphone down momentarily or adjusting a neckband microphone). In
these circumstances, it may be better to move the transmitter switch to the “MUTE” position, which maintains the radio frequency carrier signal
but mutes the microphone input. When this switch is moved back to the “ON” position, the sound will be immediately restored without waiting for
the radio signal to be reinstated.
If the wireless system is not to be used for more than a few seconds, it is preferable to slide the transmitter switch to the “OFF” position, which
mutes and deactivates the radio signal and powers down the transmitter. Be sure to turn down the volume of the mixer or amplifier and then
switch off the receiver.
Unplug signal leads from the receiver and mixer or amplifier when moving or packing away.
If the system is not to be used for long periods of time, remove the batteries from the transmitter and unplug the power adapter from the receiver
and the mains outlet. Retracting the antennae can also help avoid damage when the system is not in use.
1. Antennae
2. Power adapter input
3. Balanced XLR output
4. Unbalanced 6.3mm jack output
1. Power ON/OFF switch
2. Channel A volume control
3. Channel A Audio indicator LED
4. Channel A Radio signal LED
5. Power indicator LED
6. Channel B Radio signal LED
7. Channel B Audio indicator LED
8. Channel B volume control

SPECIFICATIONS
Carrier type
UHF 863 - 865MHz
Frequency stability
±0.005%
Maximum deviation
±25kHz
Audio frequency response
40Hz –20kHz
Signal to noise ratio
>105dB
Audio dynamic range
>80dB
T.H.D.
<0.5% @ 1kHz
Maximum range
50m
Operating temperature
-10ºC to +50ºC
RECEIVER
Power supply
12 - 18Vdc 500mA (mains adapter supplied)
Audio outputs
XLR (balanced), Jack (unbalanced)
Controls
Power On/Off, Mic. Volume(s)
Indicators
Power (main), RF and AF (for each channel)
Dimensions
45 x 210 x 180mm
Weight
573g
HANDHELD TRANSMITTER (VH1, VH2, VHN2)
Battery
3Vdc (2 x AA)
Switch
Power / Mute / On
RF emission
>10mW
Capsule type
Dynamic - cardioid response
Dimensions
242 x 45mmØ
Weight (without battery)
238g
BELTPACK TRANSMITTER (VN1, VN2, VHN2, VL1)
Battery
3Vdc (2 x AA)
Switch
Power / Mute / On
Connector
3.5mm mono jack- threaded
Compatible microphones
171.855, 171.856, 171.857
RF emission
>10mW
Dimensions (not inc. antenna)
110 x 68 x 25mm
Weight (without battery)
76g
NECKBAND MICROPHONE (VN1, VN2, VHN2)
Capsule type
Condenser - cardioid response
Power supply
3V phantom from beltpack
Connector
3.5mm mono jack - threaded
Dimensions
140 x 180 x 60mm
Weight
25g
LAVALIER MICROPHONE (VL1)
Capsule type
Condenser - cardioid response
Power supply
3V phantom from beltpack
Connector
3.5mm mono jack- threaded
Dimensions
40 x 27 x 20mm
Weight
20g
FREQUENCY CHART (all regions)
Model
Stock code
Mic 1
Mic 2
UH1
171.822
863.1MHz
-
171.823
864.1MHz
-
UH2
171.825
863.3MHz
864.3MHz
171.826
863.8MHz
864.8MHz
UN1
171.838
863.1MHz
-
171.839
864.1MHz
-
UN2
171.827
863.3MHz
864.3MHz
171.828
863.8MHz
864.8MHz
UHN2
171.820
863.3MHz
864.3MHz
171.821
863.8MHz
864.8MHz
UL1
171.846
863.1MHz
-
171.847
864.1MHz
-

Troubleshooting
“POWER” LED does not light on receiver
Ensure power adapter is connected to mains and working properly
Ensure receiver is switched on
“POWER” LED is lit but no “RF” or “AF” LEDs
Ensure transmitter is switched on
Check that transmitter is not out of reception range
Check that transmitter batteries are good / charged
“POWER” and “RF” LEDs are lit but no “AF” and no sound
Check if transmitter switch is in “MUTE” position
Check if neckband or lavalier microphone is connected to beltpack
Ensure transmitter has good / charged batteries
Check if there is another nearby transmitter with the same frequency
All LEDs lit but no sound from microphone
Make sure receiver is connected to mixer / amplifier
Make sure that receiver and amplifier / mixer channel volumes are turned up
Microphone output is very loud or distorted
Turn down GAIN ADJUST on beltpack transmitter
Turn down VOLUME on receiver
Reduce Gain on mixer / amplifier
Ensure that XLR output is not fed to a Line input
Microphone output is very low
Turn up GAIN ADJUST on beltpack transmitter
Turn up VOLUME on receiver
Increase Gain on mixer / amplifier
Ensure that Jack output is not fed to a Mic input
Check transmitter batteries
Note: for further troubleshooting, refer equipment to qualified service personnel for testing
© Chord 2011