YouXing U-778 User manual

User manual
Model: U-778
Brand: YouXing ®

Thank you for selecting UHF PLL Synthesized Diversity System. Before
operating please read this instruction manual carefully and thoroughly in
order to attain the correct operating procedures and achieve the best
results.
Parts Name And Function (Microphone)

1.A head of receiving sound There are packages of microphone in it.
2.Power switch Turn it,microphone is working. Push it the middle, it is
pause working.
3.LCD manifestation. (You can see: the channel show, frequency show,
electricity measure the manifestation)
4.Channel Selector.
5.Ring with color Logo mark It is for distinguishing different
microphones.
6.A box for a battery.
7.DC input
8.The charge indicator lamp

2、Operation of the Microphone
1. Scrcw the battery box open anticlockwise, then put in a 1.5V battery.
Attention: The polarity should be right.
2. Turn on the microphone .If the light does not twinkle or is always
lighted, you should check the battery if the voltage is enough or the
battery is well arranged.
3.Turn the switch to "STN BY"(middle), the receiver will cut out audio
output and control noises through it.
3、Repair with Simple Fault
1.Turn on the receiver,but the indicator is not lighted.
Make sure if the power cable is well fixed .Is the socket in good
condition.
Is the fuse blown.
2.When you speak ,the "AF"light twinkles,but no sound output.
Make sure if the volume keep in the lowest place, or the audio cable is
not fixed well.
3.The effective signal-receiving distance becomes close. And
signal-receiving is not well.
Check whether the receiver antenna is set up in good condition and pull
out,whether the receiver placed wrong (for example, on the ground or
corner), around the use of whether there is a strong jamming signal,
transmitter battery voltage is too low

Timbre becomes bad
Perhaps the voltage of the battery is not enough. You need change.
Perhaps there are the same frequency signals in your surroundings. Do
not use two machines with the same frequency at the same time in a
place.（separate them at least 120 meters.)
Don't open and repair it when some serious breakdown happens. Please
connect the seller or our company,we'll help you whole heartfelt. Thank
you!
4.Specification
1 .COMPREHENSIVE PERFORMANCE
CARRIERFREQUENCY : UHF627.19-682.49MHZ
FREQUENCY STABILIZATION : < 30ppm
DYNAMIC RANGE: MORE THAN 90dB
TOTAL HARMONIC DISTORTION: LESS THAN 0.5%
FREQUENCY RESPONSE: 40HZ-15KHZ 3dB
AUDIO OUTPUT LEVEL: UNBALANCED OUT: 0- 400mV
BALANCED OUT: 0- 200mV
2.FIXED RECEIVER
POWER SUPPLY: AC 220V/50-60HZ DCI2V
CONSUME POWER: 5W
SIGNAL/NOISE RATIO: MORE THAN 90DB