5.2 Specifications of receivers
Model
8121
8122
8440
Freq Range
730~950MHz
Freq number
96
4
Oscillation mode
PLL synthesized
Freq stability
±
10ppm
Receive mode
Super heterodyne
Diversity type
True
None
Input sensitivity
-90dBm
-95
~-60
dBm
-90dBm
Audio bandwidth
40~18000Hz
T.H.D. at 1kHz
≤
0.5%
S/N ratio
≥
110dB
Audio output
Balanced XLR and unbalanced 1/4
”
jack socket
Mixed and Unmixed
Power supply
110V 60Hz or 220V 50Hz
6 Hackneyed questions and solution
Phenomenon
Reason
Solution
Install batteries wrongly on the
polarity
Inspect the polarity and install it
again
Out of power
Replace the batteries
Model T16 indicator
not light on when turn
on the power switch
Battery interface rust
Clean or change the interface
Model T16 low battery
indicator light on
Low in battery
Replace the batteries
Install batteries wrongly on the
polarity
Inspect the polarity and install it
again
Out of power
Replace the batteries
Model T11,T12,T14
have no show on the
screen
Battery interface rust
Clean of change the batteries
The socket do not electrify
Check the socket
Receiver did not
electrify
The fuse of receiver attainted
Check or replace the fuse
Microphone do not turn on
Turn on the correct microphone
The frequency not match
Adjust the frequency according to
the operation manual
Receiver have no
reception
Overstep the operation distance
Back to correct operation distance
The volume is too small
Adjust the volume of the receiver
and amplifier
Receiver have
reception but no
volume
Audio cable connect wrong or
badness
Check it and connect the audio
cable correctly
There is cacophony in
the sound box
There is a same or similar system
near it
Change the frequency, keep some
distance
from
receiver
to
computer, using mobile telephone
There is screech from
sound box
feedback
Reduce
volume,
microphone
never face to the sound box, and
keep
some
distance
from
microphone to sound box
The sound
intermittence
Outside the operation distance
Back to correct operation distance
The operation distance
too short
The condition is too complicated
Avoid the complicated condition,
such as big metal objects, walls,
scaffolding, etc
7 Frequency List
7.1 Band 735 Frequency List
Group A
Group B
Group C
Channel
(Dec)
Channel
(Hex)
Freq.
(MHz)
Channel
(Dec)
Channel
(Hex)
Freq.
(MHz)
Channel
(Dec)
Channel
(Hex)
Freq.
(MHz)
00
A0
735.80
16
B0
740.60
32
C0
745.40
01
A1
736.10
17
B1
740.90
33
C1
745.70
02
A2
736.40
18
B2
741.20
34
C2
746.00
03
A3
736.70
19
B3
741.50
35
C3
746.30
04
A4
737.00
20
B4
741.80
36
C4
746.60
05
A5
737.30
21
B5
742.10
37
C5
746.90
06
A6
737.60
22
B6
742.40
38
C6
747.20
07
A7
737.90
23
B7
742.70
39
C7
747.50
08
A8
738.20
24
B8
743.00
40
C8
747.80
09
A9
738.50
25
B9
743.30
41
C9
748.10
10
AA
738.80
26
BA
743.60
42
CA
748.40
11
AB
739.10
27
BB
743.90
43
CB
748.70
12
AC
739.40
28
BC
744.20
44
CC
749.00
13
AD
739.70
29
BD
744.50
45
CD
749.30
14
AE
740.00
30
BE
744.80
46
CE
749.60
15
AF
740.30
31
BF
745.10
47
CF
749.90
Group D
Channel
(Dec)
Channel
(Hex)
Freq.
(MHz)
48
D0
750.20
49
D1
750.50
50
D2
750.80
51
D3
751.10
52
D4
751.40
53
D5
751.70
54
D6
752.00
55
D7
752.30
56
D8
752.60
57
D9
752.90
58
DA
753.20
59
DB
753.50
60
DC
753.80
61
DD
754.10
62
DE
754.40
63
DF
754.70
~10~
