SEIKAKU TECHNICAL GROUP LIMITED UPUR-8DR-81DR ユーザーズマニュアル

AB

DE

F

G

Fig 1

Frequency group

 Subchannel 

Mute(if

 the m

ute fun

ction is

 engaged, the

 mute 

label is

 shown,

 if not

 , the

 label 

     disappears)

The selected frequency

Remaining battery life of transmitter 

Press the MENU button, "GROUP" is flashing, you can choose the right frequency 

group you need via the UP/ DOWN button, when the frequency group is set, please 

press

MEN button

to store the information.

Press the MENU button

two times,

"CHANNEL" is flashing,

you can choose the right subchannel you need via the 

UP/DOWN button, when the subchannel you need is set, please press the MEN 

In mute mode, use UP/DOWN key to on/off th

e mute function.(fig 2: mute function off, 

fig 3: mute function on), press the MEM button to keep the information.

Note: when the transmitter is muted, no audio signal will be send

out from

the receiver.

When the receiver is powered on, press and hold the MEN key for one second,

the receiver is in auto scanning. The

 scan function automatically searches the 

receiver's entire frequency band from start to stop.  During the search, the audio 

 output is muted and the display indicates the frequencies in MHz as they are

 scanned. As soon as th

e correct frequency is reached, the scan will be stopped

 automatically, the 

value of frequency will be flashing, press

the MEM key, you 

 some frequencies should be scanned manually by adjusting UP/DOWN 

key, ple

ase refer

to Anne

x for details!

RF bar graph indicating the field strength of the received signal.

Audio bar graph indicating the receiver audio level

  can save the information.

button to save it.

Fig

 3

 mute

 function

 on

Fig

 2

  mute

 function

 off

In output level adjusting mode(see fig 4), use the SELECT

 button to adjust the output 

 level. The output le

vel has 3 choices, 0 indicates the output level is 500mV

, 1 indicates 

 the output level is 300mV, 2 indicates the output level is 150mV

.

Note: the function is only applied to the level of Balanced output. 

Fig 4

below a defined threshold. The

 squelch control on the receiver sets this threshold.

will not only cut out noise but mute quiet audio signals as well because the squelch

responds to the detected voltage and cannot distinguish between wanted signal and

noise. Besides

that, a too high squelch threshold also decreases the usable range.

In the squelch control mode(fig 5), use the UP/DOWN key to select squelch threshold.

The job of a squelch circuit is to reduce audible noise. It eliminates noise during

pauses in the audio signal by muting the receiver every time the audio level drops

Use the squelch control with care! If the squelch threshold is too high, the squelch

In order to achieve easy operation, the squelch threshold is divided into10 le

vels, ple

ase

-

refer to table.

Fig 5

No.

squelch threshold

1

2

3

4

5

6

7

8

9

10

Ta

ble

95.0dB

91.7dB

88.3dB

85.0dB

81.7dB

78.3dB

75.0dB

71.7dB

68.3dB

65.0dB