JK Audio Interloop User manual

JK Audio
User Guide
Interloop™
Wired/Wireless Intercom Beltpack

Interloop™ Wired/Wireless Intercom Beltpack
ii
Welcome
Thank You
Thank you for purchasing the
JK Audio Interloop.
Please read this guide for instructions
on using it.
Getting Assistance
If you have technical or application
questions:
In the US & Canada, call us toll free
at: 800-552-8346
All other countries dial: 815-786-2929
(M-F 8:30-5:00pm Central Time Zone)
Email us at: [email protected]
Or, check out our FAQ section
for answers to common questions.
Interloop is covered by a 2 year
warranty to be free from defective
workmanship and materials. To obtain
service, contact JK Audio by phone
or email for return authorization.
Once authorized, you will carefully
pack and ship the faulty product and
all accessories to us. You will pay
for shipping to us and we will pay for
return back to you.
This warranty does not cover
damages due to accident, weather,
re, ood, earthquake, misuse,
unauthorized repairs or modications,
or damages occurred in shipping, only
defective workmanship or materials.
There are no expressed or implied
warranties which extend beyond
the warranty here made.
Limited Warranty

Safety Precautions iii
Safety Precautions
Use Caution to Prevent
Hearing Loss
JK Audio products are designed for
the broadcast industry. The broadcast
professional must be able to hear
headphone signals over the ambient
noise level. From the cheering crowd
at a football game to trackside at a
car race, the program material or cues
must be heard at high volumes without
distortion.
Road Safety
Never use headphones while driving
or cycling, etc. It can be dangerous
to turn up the volume even while
walking. Doing so may hinder your
hearing and can be hazardous on the
roadways or at pedestrian crossings.
Note: While Interloop was designed to
be very rugged and durable, it is not
waterproof and care should be taken to
keep the unit dry.

Interloop™ Wired/Wireless Intercom Beltpack
iv
Overview vi
Applications 1
Controls & Indicators 2
Getting Connected 4
Conguring your Interloop 6
Bluetooth Wireless Technology
7Bluetooth Status LED
8Pairing to a Cell Phone
9Pairing to a Headset1
10 Connection History, Disconnecting from a Device
11 Reconnecting to a Device, Switching between Phone and Headset
7
FAQs 12
Technical Information 14
Contents

Features v
HD Voice*
Bluetooth Wireless Technology
2.4 GHz Encrypted Digital Wireless
3-pin XLR Male and Female
Intercom Jacks
Send and Receive Volume Controls
PTT Button
Connects to Bluetooth Headsets,
Phones, & Notebooks
Intercom Powered with 9 Volt
Battery Backup
Features
7 kHz
* HD Voice. While standard phone calls have a narrow bandwidth of 300 to 3400 Hz, HD
Voice calls offer 50 Hz to 7 kHz bandwidth. The additional 1.5 octaves on the low end gives
voice a more natural sound, while the additional upper octave dramatically improves speech
clarity and intelligibility.
Wireless HD Calls. To take advantage of this extended bandwidth, both phones on the call
must support HD Voice, and both phones must be on the same carrier, in coverage areas
that support HD Voice.

Interloop™ Wired/Wireless Intercom Beltpack
Introducing the Interloop
JK Audio combines Bluetooth Wireless Technology with Two-Wire Intercom
systems in a rugged new belt pack design.
Interloop™ works with industry standard Two-Wire, Party-Line intercoms,
connecting to the existing intercom system like any other belt pack. Using
Bluetooth Wireless Technology, Interloop™ allows wireless connection to a
variety of audio devices. A rear panel switch selects <Headset> or <Phone>
connection. <Headset> mode allows you to connect to a Bluetooth enabled
headset for wireless freedom. <Phone> mode allows you to connect to a wireless
phone to let others join in, or connect to a notebook or laptop to provide remote
voice access using communications applications such as Skype™.
HD Voice 7 kHz audio bandwidth for rich,natural voice clarity is available on many
third party headsets and cell phones. Bluetooth devices that are not HD Voice
compatible will only have a bandwidth of 3.4 kHz.
Powered by the intercom system, yet uses less current than a typical belt pack.
Includes 9 VDC battery backup, holding the wireless connection while changing
cables.
While Interloop™ will work with any Bluetooth enabled headset, most headsets
were designed to work a short distance from the phone. JK Audio BSET-HS1
Bluetooth Headset offers increased range and performance making it the perfect
match.
vi
Overview

Applications 1
Applications
Headset Mode
Connect to a Bluetooth enabled
headset and leave your beltpack
behind.
Phone Mode
Connect to a Bluetooth enabled
wireless phone or computer to
provide remote voice access to the
party-line.
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BELTPACK BELTPACK

2Interloop™ Wired/Wireless Intercom Beltpack
Controls & Indicators
1
6 7
2 3 4 5

3
Controls & Indicators
6) Talk Button
Push-on, push-off operation with solid
state logic.
7) Power Button
The <Power> button applies power to
the belt pack and immediately starts
the Bluetooth radio in Idle mode,
searching for the last connected
device.
Controls & Indicators
1) Send Control
Controls the audio level from the
Bluetooth device into the intercom.
2) Bluetooth LED
See section on Bluetooth Wireless
Technology.
3) Talk LED
4) Receive Control
Controls the audio level from the
intercom into your Bluetooth device.
5) Power Indicator
LED indicates when the power is
turned on and dims when the battery
charge is getting low.

Interloop™ Wired/Wireless Intercom Beltpack
4
2) Pair button
Momentary MFB (Multi Function
Button).
3) Intercom
Male and Female loop-through XLR
jacks.
Getting Connected
1) Role Switch
Select <Headset> if you will be using
Interloop with a Bluetooth enabled
headset or any device that emulates a
headset.
Select <Phone> if you will be using
Interloop with a cell phone or other
master device.
1 2 3

Getting Connected 5
Sidetone Null
A screwdriver slot on the side of the
unit allows ne tuning of the intercom
hybrid circuit to remove or minimize
echo. This adjustment is made by
connecting Interloop to a powered
intercom circuit, and engaging the
<Talk> button while monitoring
the Bluetooth return signal. While
speaking into the Bluetooth device,
insert a small at blade screwdriver
and adjust the null trim pot back and
forth to nd the minimum or desired
sidetone level.
Getting Connected
Intercom Audio
In bridging mode, Interloop provides
minimal loading to the intercom audio
line, typically >15k ohms impedance.
In talk mode, a soft start solid state
relay engages audio transmission
with a nominal 200 ohms output
impedance into the intercom line.
A temporary loss in intercom power
will automatically release the solid
state talk relay even if the 9V battery
backup is installed.
Send Level Control
Most Intercom Belt Packs do not
include front panel transmit level
controls. However, most belt packs
use industry standard headsets with
known sensitivity characteristics.
Bluetooth devices encompass a wide
range of sensitivities, and therefore
require an extra degree of exibility.

Interloop™ Wired/Wireless Intercom Beltpack
6
2. Remove the battery drawer.
3. Remove the two screws that
secure the battery drawer housing.
4. Carefully slide the battery housing
out from the aluminum chassis,
just enough to allow access to
the circuit board. The battery box
wiring will remain connected during
this operation.
5. Locate the slide switch located
near the XLR jacks.
a. Slide the switch towards the
XLR jacks to select Pin 3 audio.
b. Slide the switch away from the
XLR jacks to select Pin 2 audio.
6. Carefully return the battery box to
its original position, then reinstall
the screws and battery drawer.
Conguring your Interloop
XLR connections
Pin 1 = Common
Pin 2 = Intercom Power
(optional power + audio)
Pin 3 = Audio (default)
Audio Channel Selection
An internal slide switch selects either
Pin 3 or Pin 2 as the audio channel.
Interloop uses an electronic inductor
based voltage regulator to carefully
extract power from the intercom, and
a high pass lter to send and receive
audio from either Pin 3 or Pin 2.
To access the channel select
switch:
1. First turn off the Interloop
<Power> switch and disconnect
the XLR cables.

Overview
Pairing Mode
In Pairing Mode, any Bluetooth
wireless technlogy enabled device
within range can pair with your
Outerloop. The blue LED will
ash rapidly at a rate of 100ms
off, 100ms on. Once the pairing
process is complete the unique
device ID is stored in Connection
History. Subsequent connections
can be made from Idle Mode.
Idle Mode
When the <Power> switch is turned
on, Outerloop starts in Idle Mode.
In Idle Mode, Outerloop searches
for paired devices. The blue LED
will ash at a rate of 2 seconds off,
200ms on.
Connected Mode
After bonding is complete, the blue
LED will ash at a slower rate of
2secs off, 1second on ( 2 secs
off, 4 secs on for HD Voice). The
connection to that device
is secure. Outerloop returns to
Idle Mode when a connection is
dropped or terminated.
77
Bluetooth Wireless Technology
Bluetooth Status LED
The blue LED on the front of the unit ashes in different sequences to indicate the
current connection status. When attempting to put the unit into Pairing mode,
you should power the unit off then hold the <Pair> button as you are turning
the unit on. If you put the unit into the wrong state due to releasing the button at the
wrong time, holding it again for "X" seconds will not put it into the desired mode.

Interloop™ Wired/Wireless Intercom Beltpack
8
Interloop is in Pairing Mode.
3. On your device, nd and select
the option to set up a connection.
When the cell phone has found the
new device, select from the list the
device ID of "JKINTxxxx" where:
xxxx = last four digits of the serial
number.
4. If asked for a pin, enter "0000".
5. When bonding is complete, the blue
LED will ash at a rate of 2secs
off, 1sec on (2 secs off, 4 secs
on for HD Voice). Once Interloop
has been added to your cell phone,
subsequent connections can be
made more quickly from Idle Mode.
Pairing to a Cell Phone
with Bluetooth Wireless
Technology
When you are rst connecting to
a new device, you should be in an
environment with no other Bluetooth
wireless technology enabled devices
within range that might also be in
Pairing Mode.
1. Starting with the <Power> switch
Off, set the <Phone/Headset>
switch to the <Phone> position.
2. Press and hold the <Pair> button
on the Interloop while turning the
<Power> switch On. Hold the
<Pair> Button for 5full seconds.
After you release the button, the
blue LED should ash rapidly if
Bluetooth Wireless Technology

Bluetooth Wireless Technology 9
Pairing Mode.
3. Press and hold the <Pair> button
on the Interloop while turning the
<Power> switch On. Hold for 5
full seconds. After you release the
<Pair> button, the blue LED should
ash rapidly if Interloop is in Pairing
Mode.
4. Interloop will automatically pair to
the rst device it nds that is in
Pairing Mode. The next time you
pair to the same headset, you can
connect from Idle Mode instead of
Pairing Mode.
Pairing to a Headset
with Bluetooth Wireless
Technology
When you are rst connecting to
a new device, you should be in an
environment with no other Bluetooth
wireless technology enabled devices
within range that might also be in
Pairing Mode.
1. Starting with the <Power> switch
Off, set the <Phone/Headset>
switch to the <Headset> position.
2. Following manufacturer’s
instructions, set your Headset to
Bluetooth Wireless Technology
When Should I Release the Pair Button?
Idle Mode Pairing Mode Clear
Bluetooth LED
seconds

Interloop™ Wired/Wireless Intercom Beltpack
Disconnecting from a device
with Bluetooth Wireless
Technology
Since Interloop has no other function
when Bluetooth is powered down, you
may simply turn off the Power switch
to disconnect from the Bluetooth
device.
If you wish to leave Interloop powered
up while Bluetooth is powered down,
simply press and hold the <Pair>
button for 5seconds.
When a Bluetooth connection is
dropped or terminated, Interloop
returns to Idle Mode. If the unit
is in Idle Mode for >2 minutes
without a connection, Bluetooth
will automatically shut off. You may
restart Bluetooth by either turning the
<Power> switch off and on again,
or pressing the <Pair> button for 2
seconds.
10
Bluetooth Wireless Technology
Connection History
Interloop retains a history of the 16
most recent devices. To clear the
connection history and return to
factory reset, hold the <Pair> button in
for at least 20 seconds. After resetting,
Interloop will return to Pairing Mode.

Reconnecting to a Device
When reconnecting to a device that is
still in Interloop’s pairing history, the
device that will be in Headset mode
should be powered up rst and both
devices should be in Idle Mode. When
the Master device is turned on, it will
nd the Headset device during its
power up cycle.
When reconnecting to your cell
phone, the switch on Interloop should
be set to <Phone> and the Interloop
should be turned on rst.
When reconnecting to your
Bluetooth headset, the switch on
Interloop should be set to <Headset>
and the headset should be turned
on rst.
11
Bluetooth Wireless Technology
Switching Between Phone
and Headset
The Role Select switch is only
monitored during the power-up
sequence. You must power-down,
select the desired function, then
power-up for the change to take effect.
Bluetooth Wireless Technology

12 Interloop™ Wired/Wireless Intercom Beltpack
What is the range of the
Bluetooth transmitter/
receiver?
Interloop will transmit and receive
audio signals up to 65 feet from your
Bluetooth device. The actual range is
limited to the device with the shortest
range. Transmitting signals over
longer distances will require more
power, therefore you should keep
Interloop as close as possible to
your Bluetooth device to conserve
battery power.
Can I pair my Interloop to
two cell phones and send
my audio to two locations
simultaneously?
No, your Interloop can only connect
to one Bluetooth enabled device at
a time. Paired devices remain in the
history for easy connection later.
How long will the battery last?
The 9V battery is only for backup
power while the unit is disconnected
from an intercom system. As an
indicator of low battery, the red power
LED will grow dim and then extinguish
a short while before the battery is
completely exhausted and the unit
shuts down.
FAQs

FAQs 13
My Interloop will not pair with
my cell phone. Why will it not
accept the PIN?
If this is the rst time you have paired
the Interloop with this cell phone,
make certain you are in Pairing Mode
and not Idle Mode. You must press
and hold the <Pair> button on the
Interloop while turning the <Power>
switch On. Hold for 5 seconds then
release to reach pairing mode the rst
time you connect.
Can I use my Bluetooth
headset with my cell phone
while I have my phone
connected to the Interloop?
No, your cell phone can only be
connected to one Bluetooth enabled
device at a time.
FAQs

14 Interloop™ Wired/Wireless Intercom Beltpack
Technical Information
XLR Intercom Channel
Output Level: 0 dBv ( 775 mV ) nominal
Terminating Impedence: 200 ohms
Bridging Impedence: >15k ohms
Pin 1: Common
Pin 2: Power (optional Power + Audio)
Pin 3: Audio
Bluetooth Wireless Technology
Standard: Bluetooth 3.0
Range: 66 feet ( 20 meters )
Frequency Response: Hands-Free (phone): 300 Hz - 3.4 kHz
Hands-Free (HD Voice): 50 Hz -7 kHz
Power: +12 to +35 VDC, 55 mA Intercom Power with 9 VDC battery backup
Size: 4.7” x 3.75” x 1.65” (12 x 9.5 x 4.2 cm)
Weight: 10 oz (275 g)
Specications