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SU20 User Manual 

Specifications 

 

Model 

SU20-H-RG 

SU20-H-BY 

SU20-B-RG 

SU20-B-BY 

Dimensions: handheld  

250 x 47mmØ 

250 x 47mmØ 

N/A 

N/A 

Weight: handheld  

231g (no battery) 

231g (no battery) 

N/A 

N/A 

Dimensions: beltpack 

N/A 

N/A 

110 x 676 x 24mm 

110 x 676 x 24mm 

Weight: beltpack  

N/A 

N/A 

74g (no battery) 

74g (no battery) 

Power supply 

14Vdc 500mA (adaptor supplied) 

Antenna connection 

BNC 

Batteries 

4 x AA (2 per transmitter) included 

Carrier frequencies 

863.42MHz (Red), 864.3MHz (Green), 864.8MHz (Blue), 863.1MHz (Yellow) 

RF power 

10mW 

Range 

60m 

Microphone: polar pattern 

Cardioid (handheld, neckband or lavalier) 

Output connections 

2 x balanced XLR, 1 x unbalanced 6.3mm jack 

Output impedance 

2.2k Ohms 

Output level 

400mV (balanced), 200mV (unbalanced) 

Frequency response 

50Hz - 18kHz (±3dB) 

S/N ratio 

>80dB 

THD 

<0.5% @ 1kHz 

Dimensions: receiver 

203 x 187 x 42mm 

Weight: receiver 

845g 

 

Troubleshooting 

 

“POWER” LED does not light on 

receiver 

Ensure power adapter is connected to mains and working properly 
Ensure receiver is switched on (press front power button until it lights) 

“POWER” LED is lit but no “RF” 
or “AF” LEDs

 

Ensure each transmitter is switched on 
Check that each transmitter is not out of reception range 
Check that all transmitter batteries are good/charged 

“POWER” and “RF” LEDs a

re lit 

but no “AF” and no so

und 

Check that each transmitter switch is switched on 
Ensure each transmitter has good/charged batteries 
Ensure there is no other nearby transmitter with the same frequency 

All LEDs lit but no sound from 

mic 

Make sure receiver is properly connected to mixer/amplifier 
Ensure that receiver and amplifier/mixer channel volumes are turned up 

Microphone output is very loud 

or distorted 

Turn down the relevant channel VOLUME on receiver  
Turn down gain on bodypack transmitters 
Reduce gain on mixer/amplifier 
Ensure that an XLR output is not fed to a 

Hi-Z

 line input 

Microphone output is very low 

Turn up VOLUME on receiver 
Turn up gain on bodypack transmitter 
Increase gain of mixer/amplifier input 
Ensure that the jack output is not fed to an XLR input with 

Lo-Z

 level 

Check transmitter batteries 

 
 
 

 

 

Disposal:

 

The “Crossed Wheelie Bin”

 symbol on the product means that the product is classed as Electrical or  

Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life.  
The goods must be disposed of according to your local council guidelines. 

 

Hereby, AVSL Group Ltd. declares that the radio equipment type 171.907UK, 171.908UK, 171.917UK and 171.918UK is in compliance with 

Directive 2014/53/EU

 
 

The full text of the EU declaration of conformity for 171.907UK is available at the following internet address

http://www.avsl.com/assets/doc/1/7/171907UK.pdf

 

 

The full text of the EU declaration of conformity for 171.908UK is available at the following internet address

http://www.avsl.com/assets/doc/1/7/171908UK.pdf

  

 

The full text of the EU declaration of conformity for 171.917UK is available at the following internet address

http://www.avsl.com/assets/doc/1/7/171917UK.pdf

  

 

The full text of the EU declaration of conformity for 171.918UK is available at the following internet address

http://www.avsl.com/assets/doc/1/7/171918UK.pdf

 

 

Errors and omissions excepted. Copyright© 2020. AVSL Group Ltd. 

Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ 

Summary of Contents for chord SU20

Page 1: ...al UHF Wireless System Item ref 171 907UK 171 908UK 171 917UK 171 918UK User Manual Version 1 0 Caution Please read this manual carefully before operating Damage caused by misuse is not covered by the warranty ...

Page 2: ... 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 ...

Page 3: ...low channels working independently without interference with each other 1 Power on off switch 2 RF carrier signal indicator Channel A 3 AF audio signal indicator Channel A 4 VOLUME control Channel A 5 RF carrier signal indicator Channel B 6 AF audio signal indicator Channel B 7 VOLUME control Channel B 8 DC power input jack 9 BNC antenna connector Channel B 10 Unbalanced 6 3mm jack output CH A B 1...

Page 4: ...n down the volume of any equipment mixer amplifier etc that the signal will be fed into and then connect the jack lead or XLR leads to the equipment Warning take care not to point the microphones towards speakers this can cause damaging feedback loud whistle or howling noise try to aim the microphone away from the speakers Operation Switch on power to the receiver unit Move the switch on each hand...

Page 5: ...fier Ensure that receiver and amplifier mixer channel volumes are turned up Microphone output is very loud or distorted Turn down the relevant channel VOLUME on receiver Turn down gain on bodypack transmitters Reduce gain on mixer amplifier Ensure that an XLR output is not fed to a Hi Z line input Microphone output is very low Turn up VOLUME on receiver Turn up gain on bodypack transmitter Increas...

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