JTS US-902D Pro User manual

US-903DC Pro
DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
US-902D Pro
Instruction Manual

ank you for choosing the JTS wireless system. In order to obtain the best eciency
from the system, you are recommended to read this instruction manual carefully.

TABLE CONTENTS
1. Important Cautions
2. Features
3. Specification
3-1 Overall System
3-2 Receiver
3-3 Transmier
3-4 Optional Condenser Microphone
4. Parts Identification & Accessories
4-1 Receiver
4-2 Handheld Transmier
4-3 Body-pack Transmier
4-4 Condenser Microphones
5. Preparing procedures & basic operation
5-1 Receiver
5-2 Handheld Transmier
5-3 Body-pack Transmier
5-4 Installation of Condenser Microphones
6. System operation
7. Recommendations
01
01
02
02
02
03
04
06
06
08
09
09
12
12
18
20
21
22
23

Important Cautions
■Always makes all connections before plugging the unit into an AC power outlet.
■Do not leave the device in a place neither with high temperature nor high humidity.
■Always do not handle the power cord with wet hands!
■Keep the devices away from re and heat sources.
Features
■ Operated in UHF band where there is less RF interference than the VHF band.
■ Due to the PLL synthesized technology, the system oer 16 selectable channel.
■ e diversity reception ensures the stable transmission and reception.
■ Adjustable squelch control can eectively reduce the noise.
■ Tuned antennas can benet the stable RF reception.
■ Built-in Tone key Squelch & Noise Mute detection are available to restrain the interference
signal.
■ Rugged metal housing can pass through the dicult environment.
■ Equipped with balanced XLR and unbalanced for great convenience.
■ Body-pack transmier provides phantom power for condenser lavaliere and headset
microphones.
01 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
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2

Specification
3-1 Overall System
3-2 Receiver
494 MHz~870 MHz
PLL Synthesized Control OSC
16 Channels (US-902D Pro) / 64 Channel (US-903DC Pro)
50 Hz~18KHz
24 Mhz
100M
US-902D pro
±0.005%
>100 dB
-107dBm (12DB S/N AD)
>60 dB
<0.6%@1 KHz
LCD
Power On/O, Volume Control,
Channel Up/Down, Squelch level
-12 dB
Pilot Tone & Noise Mute
12-18V DC, 600 mA
2 Balanced XLR socket
1 Unbalanced ∅6.3mm Phone Jack(2.2 KΩ)
480mm(W)*45mm(H)*232mm(D)
US-903DC pro
±0.005%
>100 dB
-107dBm (12DB S/N AD)
>60 dB
<0.6%@1 KHz
LCD
Power On/O, Volume Control,
Channel Up/Down, Squelch level
-12 dB
Pilot Tone & Noise Mute
12-18V DC, 1000 mA
2 Balanced XLR socket
1 Unbalanced ∅6.3mm Phone Jack(2.2 KΩ)
480mm(W)*45mm(H)*232mm(D)
RF Frequency Range
Oscillation Type
Channels
Audio Frequency Response
Band-width
Operation Range
Receiver Model
Frequency Stability
S/N Ratio
RF Sensitivity
Image Rejection
T.H.D. (1 KHz)
Display
Controls
Audio Output Level
Squelch
Operation Voltage
Output Connector
Dimension(m/m)
3
02

Model No.
Channel
Type
Ball Grille Shape
Spurious Rejection
Stability
Frequency Deviation
S/N Ratio
Current Consumption
Baery
Model No.
Type
Ball Grille Shape
Spurious Rejection
Stability
Frequency Deviation
S/N Ratio
Current Consumption
LCD Indicates
Baery
PT-920B / PT-920BG
Body-pack
<-60dBc
+0.005%
±48 KHz
>100 dB (1 KHz-A)
100 mA
Power On/O, Low ba. Channel Frequency
UM3,AA 1,5V*2
3-3 Transmitter
Model No.
Frequency Range
Polar Paern
Sensitivity @ 1 KHz
Impedance
max. SPL for 1% T.H.D.
Connector Type
Standard Accessories
Mh-8800 / Mh-8016
16
Handheld
Flat top
<-60dBc
±10KHz
±48 KHz
>100 dB (1 KHz-A)
100 mA
UM3,AA 1,5V*2
Mh-8800G/ Mh-8064
64
Handheld
Flat top
<-60dBc
±10KHz
±48 KHz
>100 dB (1 KHz-A)
100 mA
UM3,AA 1,5V*2
03 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
Model No.
Frequency Range
Polar Paern
Sensitivity @ 1 KHz
Impedance
max. SPL for 1% T.H.D.
Connector Type
Standard Accessories
Model No.
Frequency Range
Polar Paern
Sensitivity @ 1 KHz
Impedance
max. SPL for 1% T.H.D.
Connector Type
Standard Accessories

3-4 Optional Condenser Microphone
Lavaliere Microphone
Headset Microphone
Instrument Microphone
Model No.
Frequency Range
Polar Paern
Sensitivity @ 1 KHz
Impedance
max. SPL for 1% T.H.D.
Connector Type
Standard Accessories
CM-501
100Hz~15,000Hz
Cardioid
-60dB±3dB
2.2k±30%
130dB
4 Pin Mini XLR
Windscreen
CX-201
60Hz~15,000Hz
Omini-directional
-60dB±3dB
2.2k±30%
130dB
4 Pin Mini XLR
Windscreen
CM-125
50Hz~18,000Hz
Omini-directional
-53dB±3dB
4.4k±30%
130dB
4 Pin Mini XLR
Windscreen
04
Model No.
Frequency Range
Polar Paern
Sensitivity @ 1 KHz
Impedance
max. SPL for 1% T.H.D.
Connector Type
Standard Accessories
CM-204
60Hz~15,000Hz
Omini-directional
-60dB±3dB
2.2k±30%
130dB
4 Pin Mini XLR
Windscreen
CM-204U
30Hz~18,000Hz
Cardioid
-68dB±3dB
680±30%
130dB
4 Pin Mini XLR
Windscreen
CM-225
50Hz~18,000Hz
Omini-directional
-53dB±30%
4.4k±30%
130dB
4 Pin Mini XLR
Windscreen
Model No.
Frequency Range
Polar Paern
Sensitivity @ 1 KHz
Impedance
max. SPL for 1% T.H.D.
Connector Type
Standard Accessories
CX-516W
50Hz~18,000Hz
Cardioid
-70dB±3dB
2.2k±30%
130dB
4 Pin Mini XLR
Windscreen
CX-504
30Hz~18,000Hz
Cardioid
-68dB±3dB
680±30%
130dB
4 Pin Mini XLR
Windscreen
CX-508W
50Hz~18,000Hz
Cardioid
-67dB±30%
2.2k±30%
130dB
4 Pin Mini XLR
Windscreen

05 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
Ear-hook Microphone
Model No.
Frequency Response
Polar Paern
Sensitivity (at 1KHz)
Impedance
Max. SPL for 1% THD
Connector
CM-802/CM-804
60 ~ 15,000Hz
Omni-directional
-66±3 dB* (0.5mV)*0dB
=1V/μbar,1KHz
Rated impedance 2.2kΩ
130dB
4P Mini XLR
CM-815/CM-825
50 ~ 18,000Hz
Omni-directional
-53±3 dB* (2.24mV)*0dB
=1V/μbar,1KHz
Rated impedance 4.4kΩ
130dB
4P Mini XLR

Parts Identification & Accessories
4-1 Receiver
US-902D Pro Dual Channel PLL Diversity Receiver
Power Switch
Channel Selector (Up/Down)
LCD panel
Volume control
Antenna
Squelch level adjustor
DCV Input (12-18V DC/600mA)
Unbalanced ∅6.3mm jack socket
Balanced XLR socket
Accessories
Screwdriver
AF output cable (With unbalanced ∅6.3 plug)
AC/DC adaptor
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3
4
5
6
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8
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1
2
3
4 4
5
6
7
8
9
10
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12

07 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
US-903DC Pro Dual Channel PLL Diversity Receiver
Power Switch
Channel Selector (Up/Down/Set)
LCD panel
Volume control
Antenna
Charger
Squelch level adjustor
DCV Input (12-18V DC/1000mA)
Unbalanced ∅6.3mm jack socket
Balanced XLR socket
Accessories
Screwdriver
AF output cable (With unbalanced ∅6.3 plug)
AC/DC adaptor
1
2
3
4
5
6
7
8
9
10
11
12
13
13
1
2
3
44
5
6
7
8
9
10
11
12

4-2 Handheld Transmitter
Mh-8800(Mh-8800G) Handheld Transmitter
Interchangeable capsule module
LCD display
Down buon
Up buon
Set buon
Baery tray
Power On/O switch
Mute On/O switch
Mh-8016(Mh-8064) Handheld Transmitter
Interchangeable capsule module
Power On/O switch
Channel Selection
Gain Level
Group Seing
Baery tray
1
2
3
4
5
6
7
8
9
10
11
12
13
14
08
1
2
3
4
5
6
7
8
9
9
10
10
11
11
12
13
14
Mh-8016
Mh-8016/Mh-8064
Mh-8064

09 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
4-3 Body-pack Transmitter
PT-920B(PT-920BG)
Mic. input (4 pin mini XLR socket)
Power On/O switch
Antenna
LCD display
Up buon
Down buon
Gain adjust
Baery tray cover
Screwdriver
Carry case
Baery tray
Set buon
Belt-loop
PT-920Bmi(PT-920BGmi)
Mic. input (4 pin mini XLR socket)
PowAer On/O switch
Antenna
LCD display
Up buon
Down buon
Gain adjust
Baery tray cover
Screwdriver
Carry case
Baery tray
Set buon
Aenuation Pad
Belt-loop
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3
4
5
6
7
8
9
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16
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10
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1415
16
17
18
19
23
25
26
22
20
21
24

4-4 Condenser Microphones
Lavaliere Microphone
Clip
Mini XLR
Windscreen
Headset Microphone
Gooseneck
Headband
4 Pin Mini XLR
Windscreen
Instrument Microphone
Gooseneck
Clip
4 Pin Mini XLR
Windscreen
3
6
7
10
11
10
1
1
1
8
9
8
2
55
5
5
1
2
3
4
5
6
7
8
9
10
11
CM-501
CM-201
CM-125
CM-204
CM-225
CX-508W CX-516W
CM-204U
CX-504
44
4
4

Ear-hook Microphone
Boom
Adjustable Handband
Adjustable ear hook
4 Pin Mini XLR
Cable clip
Windscreen
Detachable Cable
1
2
3
4
5
6
7
11 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
CM-804
CM-802
CM-825
CM-815
2
3
1
2
3
1
3
1
3
1
5
46
7
7
7
7

12
Preparing procedures & basic operation
5-1Receiver
(2) Audio Output Connector
Connect one end of the AF output cable to the AF output socket in the rear panel,
then plug another end to the “MIC IN” input socket of a mixer or amplier. (Step 1
of Figure 1)
It is equipped with balanced XLR output and unbalanced ∅6.3mm output, choose
the proper way for use
(1) Power output connector
Plug in one end of AC/DC adaptor cable to DC input socket in the rear panel of
receiver, and plug another end into an AC outlet. (Step 2 of Figure 1)
(3) Turn the receiver on by pressing the
Power buon on the front panel
(Figure 2)
(4) Adjust the volume control to a proper
level. (Figure 3)
5
ANT. 1ANT. 2
(Figure 2)
(Figure 3)
(Figure 1)

(5) LCD Panel
US-902D Pro
RF incoming signal level of RX1
RF incoming signal level of RX2
AF incoming signal level of RX1
AF incoming signal level of RX2
Diversity of RX1 (Antenna A or B active)
Diversity of RX2 (Antenna A or B active)
Channel display of RX1
Channel display of RX2
Ba. status of transmier
Mute status of RX1
Mute status of RX2
Seing lock-on mode
1
2
3
4
5
6
7
8
9
10
11
12
US-903DC Pro
RF incoming signal level of RX1
RF incoming signal level of RX2
AF incoming signal level of RX1
AF incoming signal level of RX2
Diversity of RX1 (Antenna A or B active)
Diversity of RX2 (Antenna A or B active)
Group & channel display of RX1
Group & channel display of RX2
Mute status of RX1
Mute status of RX2
Seing lock-on mode
13 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
12
3
5
4
6
89
10
711
9
12

US-903DC Pro
RF incoming signal level of RX1
RF incoming signal level of RX2
AF incoming signal level of RX1
AF incoming signal level of RX2
Diversity of RX1 (Antenna A or B active)
Diversity of RX2 (Antenna A or B active)
Group & channel display of RX1
Group & channel display of RX2
Mute status of RX1
Mute status of RX2
Seing lock-on mode
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2
3
4
5
6
7
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5
4
6
8
10
7
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9

US-903DC Pro
Selecting group channel:
Step 1 Group set up:
Press “SET” buon two sec. till the “SETUP” show up, then “A-1” starts
ashing, press the Up or Down buon to select a suitable group from
the pre-set four group of A,B,C,D. en, press “SET” to store the group.
Step 2 Channel set up:
en the channel number is ashing, press the Up or Down buon to
select a suitable channel from the pre-set 16 channels.
Aer step & , again press “SET” buon the receiver will
store the seing automatically.
Seing Lock-On:
1. Press “SET” buon two sec. repeat pressing till “Loc OFF” appeares. Press ”UP”
buon to lock-on mode and “DOWN” buon to lock-o mode. Re-press ”SET”
buon the lock function will store.
2. To release the Lock-On mode. Press “SET” buon two sec. till “LocON” show
up, then press “DOWN” buon till “LocOFF” appears, press “SET” again then
lock-on relieved.
Seing procedure is the same between channel A & B.
Channel A & B can’t be set up in the same group and frequency, the system will
evade this problem automatically.
e lock-on or lock-o is eective either A or B simultaneously.
1
2
3
15 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
ANT. 1ANT. 2
(6) Basic Operation
US-902D Pro
Selecting channel
Press the Up or Down buon till the RX1 starts ashing, and again
press the Up / Down buon to select a suitable channel from the
pre-set 16 channels. Later the RX1 stop ashing, the receiver will store the
channel automatically meanwhile presenting the channel number. Repeat
the action for RX2 .
Seing Lock-On
Hold both Up and Down buons till the HOLD starts ashing
simultaneously, the Lock-On mode is done. To release the Lock-On mode
hold both Up and Down boons for 2 secs.
Adjusting Squelch level
With the Squelch level control in the rear panel, you can adjust the squelch
at a suitable level. If the level is set too high, the reception range will be
reduced.
Squelch level

US-903DC Pro
Selecting group channel:
Step 1 Group set up:
Press “SET” buon two sec. till the “SETUP” show up, then “A-1” starts
ashing, press the Up or Down buon to select a suitable group from
the pre-set four group of A,B,C,D. en, press “SET” to store the group.
Step 2 Channel set up:
en the channel number is ashing, press the Up or Down buon to
select a suitable channel from the pre-set 16 channels.
Aer step & , again press “SET” buon the receiver will
store the seing automatically.
Seing Lock-On:
1. Press “SET” buon two sec. repeat pressing till “Loc OFF” appeares. Press ”UP”
buon to lock-on mode and “DOWN” buon to lock-o mode. Re-press ”SET”
buon the lock function will store.
2. To release the Lock-On mode. Press “SET” buon two sec. till “LocON” show
up, then press “DOWN” buon till “LocOFF” appears, press “SET” again then
lock-on relieved.
Seing procedure is the same between channel A & B.
Channel A & B can’t be set up in the same group and frequency, the system will
evade this problem automatically.
e lock-on or lock-o is eective either A or B simultaneously.
1
2
3
4
5
16
Step 1 Step 2

Using the baery charge of US-903DC Pro
Push the charger’s cover and put 4 pcs of rechargeable baeries into the baery tray.
Please match the correct polarity (+ and -) (Figure 1), then return the cover for
charging the baeries.
It is convenient to know the charging status via the LED indicator. e two red LED
will ash during the charging and as soon as the baeries is fully charged, the two red
LED will light up. (Figure 2)
Caution
To avoid battery leakage or explosion
(1) Remove baeries when the wireless microphones will not be used for a long time.
(2) When you need to replace the baeries, replace both baeries at the same time with
new ones.
(3) Don’t use dierent type of baeries together!
17 DUAL CHANNEL PLL DIVERSITY WIRELESS SYSTEM
(Figure 1)
(Figure 2)
1
2