Chiayo Electronics Co Ltd MT-U8 ユーザーズマニュアル

There will be different, non-conflicting channels in other frequency groups supplied 

around the world so please check with your dealer or national supplier for this informa-

tion. Fit an Alkaline AAA battery into the battery compartment, re-fit the lid and push 

the sealed on/off button. A tiny blue LED illuminates to let you know it’s on. When that 

LED starts flashing then the usable power is running low and it’s time to change the 

battery. One AAA battery will supply over 5 hours of air time. Re-chargeable AAA bat-

teries can also be used.
Using Multiple Transmitters At One Location 

Please note that the MT-U8 is an 8 channel transmitter and will normally be supplied 

lining up with channels 01-08 on the receiver. In some countries a “B” group of chan-

nels may also be available (Ch. 09-16). In both cases the channels line up with the same 

number on the receiver and then repeat - so that channel 00 is also channel 08 on the 

MT-U8. If you wish to use multiple MT-U8/SM716 systems under the one roof then at 

least 4 channels can be used without causing interference with each other. In the case 

of the 630-650MHz range, channels 1,4, 5 or 8 can be used together. If you are also us-

ing a beltpack transmitter in the same or another room nearby, then that should be set 

to a channel in the 09-16 group, of which channels 10, 12,14 or 16 will work best with 

channels 1,4, 5 or 8. There will be different, non-conflicting channels in other frequency 

groups supplied around the world so please check with your dealer or national supplier 

for this information.

If you encounter receiving interference (from other than an operating TV station), 

it can often be overcome by adjusting the receiver’s squelch control, as described 

below. Please note that wireless frequencies are shared with other radio services, and 

according to FCC regulations wireless microphone operations are unprotected from 

interference from licensed operations in the band. If any interference is received by 

any Government or non-Government operation, the wireless microphone must cease 

operation. (The above statement is valid for the U.S.A.)
Receiver Squelch control

The squelch control on the back panel of the receiver is preset at the factory, but can 

be adjusted if you must use the system in a high RF interference area. If there is audio 

output from the receiver when your transmitter is OFF, adjust the squelch control so 

the system will receive the signal from your transmitter but squelch or eliminate the un-

wanted background RF noise. This adjustment can cause a reduction in usable range of 

the wireless transmitter, so set the control to the lowest position which reliably mutes 

the unwanted RF signal.