Vocopro DA2277 Manual Do Utilizador

There are two primary ways that other wireless systems and TV channels cause interference. The first is a 

direct frequency conflict. If two wireless systems are on the same frequency, usually neither system will be 

usable unless the other is turned off. This problem is more common than might be expected, especially 

when all the equipment is the same type. This is because most systems have only a limited number of 

standard frequencies. It should be remembered that the other systems could be some distance away - in 

another house of worship down the street, in another nearby studio, or at another club in the vicinity. 

TV transmitters can also be a powerful source of direct interference if the wireless frequency falls within 

the assigned channel of a local TV station. This problem sometimes occurs because wireless frequencies 

are listed in MHz and it is not always obvious within which TV channel a particular frequency falls. For 

reference, below is TV frequency information.

Channel

Number

Frequency

Range (MHz)

Picture Carrier

Frequency (MHz)

Color Sub carrier

Frequency (MHz)

Sound Sub carrier

Frequency (MHz)

7             174-180           175.250             178.8295                179.750
8             180-186           181.250             184.8295                185.750
9             186-192           187.250             190.8295                191.750
10           192-198           193.250             196.8295                197.750 
11           198-204           199.250             202.8295                203.750
12           204-210           205.250             208.8295                209.750  
13           210-216           211.250             214.8295                215.750 

NOTE: The low VHF TV channels (2 through 6) are not used for wireless microphones and do not need to be considered

 

The low VHF TV channels (2 through 6) are not used for wireless microphones and do not need    

                   to be considered