JB Systems HF-TWIN User manual

ENGLISH OPERATION MANUAL
JB SYSTEMS®1/8 HF-TWIN RECEIVER
OPERATION MANUAL
Thank you for buying this JB Systems®product. To take full advantage of all possibilities, please read these
operating instructions very carefully.
FEATURES
This unit is radio-interference suppressed. This appliance meets the requirements of the current European
and national guidelines. Conformity has been established and the relevant statements and documents have
been deposited by the manufacturer.
•Dual PLL/UHF wireless microphone receiver used in combination with:
•HF-MIC: wireless hand microphone (order code : B08308)
•HF-BPACK: belt-pack and lavalier microphone (order code : B08309)
•Can be combined with the microphone combinations you need:
•2 x HF-MIC
•2 x HF-BPACK
•1 x HF-MIC + 1 x HF-BPACK
•The plastic case can hold one of the above combinations.
•LCD display for easy setup
•Easy channel setup via IR transmission.
•Belt-pack and hand microphone can both be used with rechargeable batteries!
•16 selectable frequencies via PLL synthesizer:
•Receiver 1 (left): channel 1 to 8
•Receiver 2 (right): channel 9 to 16
•2 separate balanced XLR outputs
•1 x 6.3mm jack output with mixed signal from both channels
•Frequency range: 823-832MHz (free use in most European countries)
BEFORE USE
•Before you start using this unit, please check if there’s no transportation damage. Should there be any, do
not use the device and consult your dealer first.
•Important: This device left our factory in perfect condition and well packaged. It is absolutely necessary
for the user to strictly follow the safety instructions and warnings in this user manual. Any damage caused
by mishandling is not subject to warranty. The dealer will not accept responsibility for any resulting defects
or problems caused by disregarding this user manual.
•Keep this booklet in a safe place for future consultation. If you sell the fixture, be sure to add this user
manual.
•To protect the environment, please try to recycle the packing material as much as possible.
Check the contents:
Check that the carton contains the following items:
•User manual
•1x HF-TWIN RECEIVER
•1x Plastic case
•1x mains DC power adapter

ENGLISH OPERATION MANUAL
JB SYSTEMS®2/8 HF-TWIN RECEIVER
SAFETY INSTRUCTIONS:
•To prevent fire or shock hazard, do not expose this appliance to rain or moisture.
•To avoid condensation to be formed inside, allow the unit to adapt to the surrounding temperatures when
bringing it into a warm room after transport. Condense sometimes prevents the unit from working at full
performance or may even cause damages.
•This unit is for indoor use only.
•Don’t place metal objects or spill liquid inside the unit. No objects filled with liquids, such as vases, shall be
placed on this appliance. Electric shock or malfunction may result. If a foreign object enters the unit, im-
mediately disconnect the mains power.
•No naked flame sources, such as lighted candles, should be placed on the appliance.
•Don’t cover any ventilation openings as this may result in overheating.
•Prevent use in dusty environments and clean the unit regularly.
•Keep the unit away from children.
•Inexperienced persons should not operate this device.
•Maximum save ambient temperature is 40°C. Don’t use this unit at higher ambient temperatures.
•Minimum distances around the apparatus for sufficient ventilation is 10cm.
•Always unplug the unit when it is not used for a longer time or before you start servicing.
•The electrical installation should be carried out by qualified personal only, according to the regulations for
electrical and mechanical safety in your country.
•Check that the available voltage is not higher than the one stated on the rear panel of the unit.
•The socket inlet shall remain operable for disconnection from the mains.
•The power cord should always be in perfect condition. Switch the unit immediately off when the power cord
is squashed or damaged.
•The socket inlet is used as the disconnect device, the disconnect device shall remain readily operable
•This appliance must be earthed to in order comply with safety regulations.
•In order to prevent electric shock, do not open the cover. There are no user serviceable parts inside.
•Never repair a fuse or bypass the fuse holder. Always replace a damaged fuse with a fuse of the same
type and electrical specifications!
•In the event of serious operating problems, stop using the appliance and contact your dealer immediately.
•Please use the original packing when the device is to be transported.
•Due to safety reasons it is prohibited to make unauthorized modifications to the unit.
CAUTION
CAUTION: To reduce the risk of electric shock, do not re-
move the top cover. No user-serviceable parts inside. Refer
servicing to qualified service personnel only.
The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the
use or the presence of un-insulated “dangerous voltage” within the product’s enclosure that may
be of sufficient magnitude to constitute a risk of electric shock.
The exclamation point within the equilateral triangle is intended to alert the user to the presence of
important operation and maintenance (servicing) instructions in the literature accompanying this
appliance.
This symbol means: indoor use only
This symbol means: Read instructions
This symbol means: this amplifier is capable of producing very high sound pressure levels that
may permanently damage your ears. Hearing experts strongly advise against permanent expo-
sure to high sound levels!

ENGLISH OPERATION MANUAL
JB SYSTEMS®3/8 HF-TWIN RECEIVER
RECEIVER FUNCTIONS
1. ANTENNAS: Fixed-length UHF antennas permanently mounted on the back of the receiver. Put these in
vertical position during use.
2. IR INDICATOR: used to send the selected channel to the microphone(s) to connect with.
3. POWER switch: used to turn on and off the receiver.
4. VOLUME KNOB A: used to adjust the audio output level of receiver A.
5. “IR”KNOB A: used to send the chosen channel information (Freq.) from receiver A to the microphone
to work with.
6. “SET”KNOB A: used to set the desired channel (Freq.) for receiver A.
7. DISPLAY: shows the information (channel, frequency, battery and microphone status, RF and AF level)
from both receivers (A and B).
A. RF-level / AF-level indicators
B. : antenna symbol. Shows the antenna that receives the RF-signal for receiver A.
C. : battery symbol. Shows the battery level of the connected microphone/beltpack for receiver
A.
D. : microphone status symbol. Shows whether the connected microphone/beltpack is switched
on or off.
E. : antenna symbol. Shows the antenna that receives the RF-signal for receiver B.
F. Channel number indicator. Shows the channel number (1-16) the connected micro-
phone/beltpack is working on.
G. Frequency indicator. Shows the corresponding frequency of the channel.
H. : IR-signal indicator. Shows the sending of the IR-signal during setup.
8. “IR”KNOB B: used to send the chosen channel information (Freq.) from receiver B to the microphone
to work with.
9. “SET”KNOB B: used to set the desired channel (Freq.) for receiver B.
10. VOLUME KNOB B: used to adjust the audio output level of receiver B.
11. DC INPUT: DC input connector for the supplied 12V AC/DC adapter.
12. Balanced output B: Balanced male XLR audio output connector from receiver B. Connect it with a bal-
anced audio cable to your mixer or pre-amplifier.
13. Balanced output A: Balanced male XLR audio output connector from receiver A. Connect it with a bal-
anced audio cable to your mixer or pre-amplifier.
14. AUX: 6.3mm jack connector. On this connector there is a mixed signal from both receivers (A and B).

ENGLISH OPERATION MANUAL
JB SYSTEMS®4/8 HF-TWIN RECEIVER
HF-MIC HANDHELD MICROPHONE FUNCTIONS
1. GRILL: Protects the unidirectional microphone capsule and
helps reduce breath sounds and wind noises.
2. DISPLAY: shows the channel (1-16), the frequency and the
battery status of the microphone.
3. IR SENSOR: receives the IR-signal from the HF-TWIN RE-
CEIVER during setup of the chosen channel to work on.
4. ON/OFF SWITCH: to turn the HF-MIC on and off.
5. BATTERY COMPARTMENT: Insert two 1.5V AA rechargea-
ble or dry (Alkaline) batteries into the compartment by un-
screwing the battery cover gently and slide it down. Make
sure that the polarity of the batteries is correct.
6. LO-HI SELECTOR: used to switch the power from the RF-
signal from LO (5dBm -3,16mW) to HI (10dBm-10mW).
HF-BPACK BELT PACK FUNCTIONS
1. ANTENNA: Permanently connected helical antenna.
2. DISPLAY: shows the channel (1-16), the frequency and the battery status of the beltpack.
3. POWER SWITCH: to turn the HF-BPACK on and off.
4. BATTERY COMPARTMENT: Insert
two 1.5V AA rechargeable or dry (Alka-
line) batteries into the compartment by
pressing gently at the sides of the cover
and pulling it backwards. Make sure
that the polarity of the batteries is cor-
rect
5. Mini-jack with screw thread : The in-
cluded electret lavalier microphone (or
optional headset) is inserted into this
connector.
6. TIE CLIP: used to clip the HF-BPACK
on the belt of a person.
7. IR SENSOR: receives the IR-signal
from the HF-TWIN RECEIVER during
setup of the chosen channel to work on.

ENGLISH OPERATION MANUAL
JB SYSTEMS®5/8 HF-TWIN RECEIVER
INSTALLATION GUIDELINES:
•Install the receiver in a ventilated location where it will not be exposed to high temperatures or humidity.
•Placing and using the unit for long periods near heat-generating sources such as amplifiers, spotlights, etc.
will affect its performance and may even damage the unit.
•To avoid condensation to be formed inside, allow the unit to adapt to the surrounding temperatures when
bringing it into a warm room after transport. Condense sometimes prevents the unit from working at full
performance.
•Also check the extra notes in the chapter “SETUP and CONNECTIONS”
INSTALLING THE RECEIVER:
Put both antennas in vertical position and connect the receiver as described in the chapter “setup and con-
nections”.
SETUP AND CONNECTIONS
! Some important notes before we start !
•The HF-TWIN RECEIVER can be used with two transmitters (handheld mic / belt pack) at the same time.
•Receiver and transmitter(s) should always use the same channel settings (frequency)!
•The maximum working distance between receiver and transmitter(s) is 40 meters. (depending on the am-
bient conditions)
•To minimize interferences install the receiver away from big metal surfaces/objects, TV and other wireless
appliances as much as possible.
•Try to minimize the number of obstructions (thick concrete walls, big metal objects, …) in the path between
the transmitter and receiver.
•Depending on the chosen channels and ambient conditions, up to 4 transmitters (2 receivers) can be used
simultaneously.
RECEIVER –AUDIO CONNECTIONS
First determine which audio inputs are available on your
mixer, next decide how to connect the receiver:
•To a balanced MIC-input of the audio mixer: close the
gain of the mixer input. Use an XLR/XLR cable to con-
nect the receiver A “XLR-output (13)”. Do the same for
receiver B by using XLR-output (12) if you will use 2 mi-
crophones. Switch the transmitter(s) (hand mic/belt pack)
on and bring the input gain(s) of the mixer slowly up.
•To a balanced LINE-input of the audio mixer: close
the gain of the mixer input. Use an XLR/XLR cable to
connect the receiver A “XLR-output (13)”. Do the same
for receiver B by using XLR-output (12) if you will use 2
microphones. Switch the transmitter(s) (hand mic/belt
pack) on and bring the input gain(s) of the mixer slowly
up.
•To an unbalanced LINE-input of the audio mixer or
hifi stereo set:close the gain of the mixer input. Use a
6.3mm JACK/JACK cable to connect the “AUX”output
(14)” to a line input of the mixer. Switch the transmitter
(hand mic/belt pack) on and bring the input gain of the
mixer slowly up. The signal on the “AUX”connector is a
mix from the signals from receiver A and B.
NOTE: don’t use the balanced and unbalanced outputs
together, this will results in signal loss and increased noise.

ENGLISH OPERATION MANUAL
JB SYSTEMS®6/8 HF-TWIN RECEIVER
HF-TWIN RECEIVER SETUP
Note: Even if the transmitters and receiver have 16 channels, you cannot use 16 wireless systems together:
depending on the situation you will be able to use maximum 2 sets together.
While setting up more than one system, you should choose different channels for each set. It’s important that
you never choose consecutive channels. Instead try to divide the channels evenly over the 16 possibilities:
First setup one system and leave it switched on.
Setup the second system and check if it interferes with the first one (unwanted buzz noises etc.). In case of
interferences, select another channel for your 2nd set and try again until everything works well and leave the
set switched on.
•Switch on the HF-TWIN RECEIVER by pressing the POWER switch (3).
•Select a channel (1-8) for receiver A or a channel (9-16) for receiver B.
- To setup the channel for the left receiver (A), press the “SET”knob A (6) for about 2 seconds. The
channel number indicator (F) will start blinking. While this indicator is blinking you can select the de-
sired channel by pressing shortly the “SET”knob (6) until the right channel appears on the display.
- Wait for about 3 seconds until the blinking stops.
- The receiver (A) is on the desired channel (1-8) now.
- Do the same for receiver B by using “SET”knob B (9) (channels 9-16) if you want to use 2 micro-
phones simultaneously.
- Channel Frequencies:
CH 1
825 MHz
CH 9
828,3 MHz
CH 2
825,7 MHz
CH 10
828,7 MHz
CH 3
827,3 MHz
CH 11
829,2 MHz
CH 4
831,2 MHz
CH 12
829,6 MHz
CH 5
824,5 MHz
CH 13
830 MHz
CH 6
826,1 MHz
CH 14
830,4 MHz
CH 7
826,6 MHz
CH 15
830,8 MHz
CH 8
827,7 MHz
CH 16
831,7 MHz
•Now send the channel information to the microphone (HF-MIC or HF-BPACK) you want to use on each
receiver (A or B) by using the corresponding IR-knob. IR-knob A (5) for the left receiver (channels 1-8) or
IR-knob B (8) for the right receiver (channels 9-16).
•Hold the microphone you want to synchronize with its IR-sensor in front of the IR-indicator (2) of the HF-
TWIN RECEIVER and press the IR-knob for about 2 seconds. The IR-indicator symbol (H) will start blink-
ing. When the blinking stops, the channel information has been send to the microphone or belt pack.
•The HF-TWIN RECEIVER is now ready to be used.
•Adjust the AF output from the left receiver (A) by turning it’s volume knob (4) clockwise. Do the same for
the right receiver (B) by using the volume knob (10).
•Switch off the HF-TWIN RECEIVER by pressing the POWER switch (3).
HF-MIC –SETUP
•First switch on the HF-TWIN RECEIVER and select a channel (1-8) for receiver A or a channel (9-16) for
receiver B.
•Open the battery compartment (5) of the HF-MIC and insert two AA batteries (alkaline or rechargeable
battery).
•Switch on the HF-MIC by pressing the ON/OFF switch (4) for a second. The display (2) will light up.
•Hold the IR-sensor (3) of the HF-MIC in front of the IR-indicator (2) of the HF-TWIN RECEIVER.
•Press the IR-KNOB A (6) or the IR-KNOB B (8) on the HF-TWIN RECEIVER for about 2 seconds. The IR-
indicator symbol (H) will start blinking 3 times. When the blinking stops, the HF-MIC has received the
channel information from the HF-TWIN RECEIVER and will now work with this part (A or B) from the re-
ceiver.
•Do the same for a second HF-MIC if you want to use 2 microphones.
•Speak through the mic: the AF indicator (A) will move to the rhythm of your voice.

ENGLISH OPERATION MANUAL
JB SYSTEMS®7/8 HF-TWIN RECEIVER
•While checking the system, walk around to check if you encounter any dead spots (no reception): in these
cases, try to change the position of the receiver.
•Switch off the HF-MIC by pressing the ON/OFF switch (4) for a second. The display (2) will shortly show
“OFF”before shutting down the microphone.
•The power of the RF-signal can be changed with the LO-HI selector (6) from LO (5dBm -3,16mW) to HI
(10dBm-10mW) to get a better reception of bigger distance range.
HF-BPACK –SETUP
•First switch on the HF-TWIN RECEIVER and select a channel (1-8) for receiver A or a channel (9-16) for
receiver B.
•Open the battery compartment (4) of the HF-BPACK by pressing gently at the sides of the cover and pull-
ing it backwards and insert two AA batteries (1.5V alkaline or rechargeable).
•Switch on the HF-BPACK by pressing the POWER switch (3) for a second. The display (2) will light up.
•Hold the IR-sensor (7) of the HF-BPACK in front of the IR-indicator (2) of the HF-TWIN RECEIVER.
•Press the IR-KNOB A (6) or the IR-KNOB B (8) on the HF-TWIN RECEIVER for about 2 seconds. The IR-
indicator symbol (H) will start blinking 3 times. When the blinking stops, the HF-MIC has received the
channel information from the HF-TWIN RECEIVER and will now work with this part (A or B) from the re-
ceiver.
•Do the same for a second HF-BPACK if you want to use 2 belt pack microphones.
•Connect the lavalier microphone or optional headset on the mini-jack connector (5) of the HF-BPACK.
•Speak through the mic: the AF indicator (A) will flash to the rhythm of your voice.
•While checking the system, walk around to check if you encounter any dead spots (no reception): in these
cases, try to change the position of the receiver.
•Switch off the HF-BPACK by pressing the POWER switch (3) for a second. The display (2) will shortly
show “OFF”before shutting down the belt pack.
TROUBLESHOOTING
Problem
Solution
No sound
•Check the power supply of the microphone and receiver.
•Check if the transmitter and receiver are tuned to the same channel (frequency).
•Check if the hi-fi appliance or audio mixer is switched on and the receiver output is
connected to the desired audio input. Mixer: is the gain open?
•Check if the transmitter is too far away from the receiver.
•Check if the receiver is located near a large metal object or if there are large obstruc-
tions (ex. large metal object or thick wall) between transmitter and receiver.
Sound interference
•Check the antenna location.
•When using 2 HF-TWIN RECEIVERs simultaneously, make sure that the selected
channels don’t interfere: select another channel pair on one of the receivers.
•Check whether the interference comes from other wireless microphones, TV, radio,
PC, etc.
Distortion
•Check if the receiver volume level is set too high or too low.
•Check if the interference comes from other wireless microphones, TV, radio, PC, etc.
CLEANING THE APPLIANCE:
Clean by wiping with a polished cloth slightly dipped with water. Avoid getting water inside the unit. Do not
use volatile liquids such as benzene or thinner which will damage the unit.

ENGLISH OPERATION MANUAL
JB SYSTEMS®8/8 HF-TWIN RECEIVER
SPECIFICATIONS
This unit is radio-interference suppressed. This appliance meets the requirements of the current European
and national guidelines. Conformity has been established and the relevant statements and documents have
been deposited by the manufacturer.
HF-TWIN RECEIVER
Carrier Frequency Range:
823-832MHz
Modulation Mode:
FM
Receiver type:
PLL synthesized, 16 channels selectable
S/N ratio:
90dB
AF Response:
40Hz to 17kHz
T.H.D.:
<1,0%
Power Supply:
DC 12V
Audio Output:
Output impedance:
Balanced outputs Aand B, mixed output (6.3mm jack)
600 Ohm
Current consumption:
<300mA
HF-MIC
Carrier Frequency Range:
823-832MHz
RF Power Output:
LO (5dBm -3,16mW) - HI (10dBm-10mW)
Oscillation Mode:
PLL synthesized, 16 channels selectable
Frequency Stability:
Frequency Response:
0,002%
40Hz –17kHz
Microphone Capsule:
Battery:
Dynamic
DC 3V (2 x 1,5V AA size batteries)
HF-BPACK
Carrier Frequency Range:
RF Power Output
Oscillation Mode:
Frequency Stability:
Frequency Response :
Microphone Capsule (Lavalier):
Battery:
823-832MHz
10mW (10dBm)
PLL synthesized, 16 channels selectable
0,002%
40Hz –16kHz
Condenser
DC 3V (2 x 1,5V AA size batteries)
Every information is subject to change without prior notice
You can download the latest version of this user manual on our website: www.jb-systems.eu