JK Audio BluePack User manual

JK Audio
BluePack™
Wireless interview tool
User Guide

ii BluePack Wireless Interview Tool
Welcome
Thank You
Thank you for purchasing the
JK Audio BluePack. 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.
Limited Warranty
BluePack 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.

Overview iii
Safety Precautions
Use Caution to Prevent
Hearing Loss
BluePack contains a headphone
amplier that is more powerful than
the typical consumer product.
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 BluePack was designed
to be very rugged and durable, it is not
waterproof and care should be taken to
keep the unit dry.

iv BluePack Wireless Interview Tool
Overview vi
Applications 1
Controls & Indicators 2
Getting Connected 4
Bluetooth Wireless Technology
6Bluetooth Status LED
7Pairing
8Master or Headset Mode
9Switching between Master/Headset Mode, Master Mode Streaming
10 Connection History, Disconnecting from a Device, Reconnecting to a Device
6
FAQs 11
Technical Information 14

Contents v
Contents
HD Voice*
Bluetooth Wireless Technology
XLR Mic Input
3.5 Mm Stereo Line Input and Output
¼" Stereo Headphone Jack
>10 Hours on one 9 Volt Alkaline Battery
Features
7 kHz
* HD Voice. While standard phone calls have a narrow bandwidth of 300 Hz to 3.4 kHz, 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.

vi BluePack Wireless Interview Tool
Introducing BluePack
JK Audio combines professional audio electronics with a exible communications
interface in a rugged new belt pack design. BluePack™ offers a professional look
and feel to eld reporters and live remote talent.
BluePack™ allows you to perform live man-on-the-street interviews through your
cell phone in HD Voice. BluePack also provides two-way IFB connections through
a cell phone or notebook for truly exible remote monitoring.
HD Voice is available on many third party headsets and cell phones. Interview in
7 kHz audio bandwidth for rich,natural voice clarity.
Connect to cell phones and notebooks through Bluetooth Wireless Technology.
This professional microphone preamp and powerful headphone amplier provide
a vast improvement in sound quality. A 3.5 mm stereo line input jack allows
recordings to be mixed into the broadcast. The 3.5 mm stereo line output jack
provides your full bandwidth microphone signal on the left channel and the return
audio on the right channel.
The stereo headphone output gives you a mix of the XLR microphone input,
3.5 mm input, and return audio. This powerful stereo headphone amplier will cut
through any crowd noise.
Overview

Applications 1
Applications
Live Man-On-the-Street
Broadcasts
Connect your microphone and
headphones to the BluePack, then
establish a Bluetooth connection
to your wireless phone. Dial up the
studio and you are ready to go.
Add prerecorded sound clips or
background music to your interviews
through the Aux Send input.
Telephone Interviews
Call out and interview other people
as part of your pre-game show.
Connect your mic and headphones
as shown and send audio through
the line output to your laptop for live
streaming or to your portable recorder
for later broadcast.
Mic Pre-Amp
Connect your dynamic microphone
to the XLR jack and connect the
line level 3.5 mm output to your
other audio equipment. Use the
thumbwheel on the top of the
BluePack to set the volume level for
the mic input.
BluePack in Master Mode
Congure the BluePack in Master
mode, pair it with a Bluetooth enabled
stereo headset and send stereo audio
to the headset. Tap the <MFB> to
switch to Hands Free mode and have
a full-duplex conversation.

2BluePack Wireless Interview Tool
Controls & Indicators
1 2 3 64 5 7
98
2) Peak Indicator
The peak LED indicates clipping
on the input channel if the level is
set too high. The microphone and
Aux Send are a combined input. If
you see this red LED ashing, you
should decrease the <Mic> and/or
<Aux Send> input levels.
1) Mic Control
Controls the level of your microphone
input.

Controls & Indicators 3
6) Headphones Control
Sets the level of audio sent to the
headphone output jack.
7) Power Indicator
LED indicates when the power is
turned on and dims when the battery
charge is getting low.
8) Multi-Function Button (MFB)
Establish a connection with your
Bluetooth enabled cell phone, laptop
or other device.
9) Power Button
Press to activate the unit. Press again
to turn the unit off.
Controls & Indicators
3) Aux Send Control
Adjusts the level of audio from the
3.5 mm Aux Send input jack.
4) Stereo LED (Listen-Only)
The <st> LED ashes Red when the
BluePack has a stereo listen-only
(Headset) audio connection with your
Bluetooth device.
When you receive an incoming phone
call, the stereo LED will turn off.
This LED will ash Green when the
unit is in Master mode, sourcing
stereo A2DP audio to a Bluetooth
enabled headset device
5) Bluetooth LED
See section on Bluetooth Wireless
Technology.

4BluePack Wireless Interview Tool
2) Stereo Line Level Output
The unbalanced 3.5 mm stereo xed
line level output jack provides your full
bandwidth microphone signal on the
left channel and the Bluetooth audio
on the right channel.
Getting Connected
1) Headphones
Connect your headphones to this 1/4”
jack. The stereo headphone output
gives you a mix of the XLR mic input,
3.5 mm Aux Send input and the
Headset Interface audio.
21 3 4

Getting Connected 5
4) Mic Input
Connect your dynamic microphone
to the XLR jack. This device will
not provide phantom power for a
condenser type microphone.
You can use both the balanced
XLR and unbalanced 3.5 mm inputs
simultaneously. The line level Aux In
jack allows recordings to be mixed into
the broadcast with your microphone
to be sent out through the Bluetooth
connection.
Getting Connected
This stereo output jack allows you to
make a full bandwidth recording using
your favorite recorder for transfer back
at the station or over the web.
3) Stereo Line Level Aux In
Connect the output of your other audio
equipment to this unbalanced stereo
3.5mm Aux In jack. This enables you
to add background music or sound
clips to your remote broadcast.
This audio is not present at the
Stereo Output but will be sent to the
Headphone jack.

6BluePack Wireless Interview Tool
Bluetooth Wireless Technology
Pairing Mode
In Pairing Mode, any Bluetooth
wireless technlogy enabled device
within range can pair with your
BluePack. To put the unit in Pairing
Mode, press the blue <MFB> for 6
seconds while the unit is on. 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
automatically from Idle Mode.
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 Idle or
Pairing mode, you should power the unit off then back on before pressing
the <MFB>. If you put the unit into the wrong state due to releasing the <MFB>
at the wrong time, holding the <MFB> for "X" seconds will not put it into the
desired mode.
Idle Mode
In Idle Mode, BluePack searches for
paired devices. To put the unit in Idle
Mode, press the blue <MFB> for 4
secs when the unit is on. The blue
LED will ash at a rate of 2 secs off,
200ms on.
Connected Mode
After bonding is complete, the blue
LED will ash at a slower rate of
2secs off, 1sec on (2 secs off,
4 secs on for HD Voice). The
connection to that device is secure.

7
Pairing to a Cell Phone
with Bluetooth Wireless
Technology
When you're 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. Turn the BluePack on, then hold
the blue <MFB> button for 6full
seconds. After you release the
<MFB> button, the blue LED should
ash rapidly if BluePack is in Pairing
Mode.
2. 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 "JKBPxxxx" where:
xxxx = last four digits of the serial
number.
3. If asked for a pin, enter "0000".
4. 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 BluePack
has been added to your cell phone,
subsequent connections can be
made more quickly from Idle Mode.
Bluetooth Wireless Technology
Bluetooth Wireless Technology
When Should I Release the MFB Button?
Idle Mode Pairing Mode Role Change Clear
Bluetooth LED
seconds

8BluePack Wireless Interview Tool
Master or Headset Mode
In the Bluetooth world, a Master
device, such as a wireless phone,
computer, or music player, is
connected to a Headset device. The
Master device controls the connection,
and also has the ability to stream
stereo A2DP audio to the Headset
device. A2DP music streaming is a
one-way path from Master to Headset.
BluePack can act as either a Master
or Headset. Please note that wireless
phones typically cannot receive A2DP
stereo music streaming.
BluePack will rst attempt to connect
using the Hands-Free prole, allowing
3.4 kHz (7 kHz if HD Voice is available
on your phone) telecom bandwidth
for a mono full-duplex connection. If
the Hands-free prole is not available,
BluePack will attempt to connect in
A2DP stereo streaming mode.
Bluetooth Wireless Technology
What is the Difference
between Proles?
A2DP (Advanced Audio
Distribution Prole):
Used for stereo music streaming.
Headset: Facilitates mono,
full-duplex audio between two
paired devices.
Hands-Free: Similar to Headset
prole, but allows the receiving
device more control over the call,
such as volume, accept/reject/end
a call.

Bluetooth Wireless Technology 9
Master Mode Streaming State
Simply tap the <MFB> button to toggle
between stereo A2DP and mono
Hands-Free proles. This can only be
done while the unit is in Master mode.
During A2DP streaming, the
<st> LED will be lit Green.
The <st> LED will not be lit when the
Hands-Free prole is in use.
Switching between Master and
Headset Modes
To switch between Master and
Headset mode, you must start from
the Bluetooth power-off state. Power
off the unit, then back on again. Hold
the <MFB> down for 11 seconds then
release. The ST LED on the top of the
BluePack will ash Green when the
device is in Master mode. The ST LED
will ash Red when it is in Headset
mode. The <st> LED only indicates
whether the BluePack is in Master or
Headset Mode on Startup and when
the Master/Headset role is switched.
The timing of the LEDs while pairing
with another device should remain the
same for either state.
Bluetooth Wireless Technology

10 BluePack Wireless Interview Tool
Bluetooth Wireless Technology
Connection History
BluePack retains a history of the
16 most recent devices. To clear
the connection history and return
to factory reset, hold the <MFB>
button in for at least 20 seconds.
After resetting, BluePack will return to
Pairing mode.
Reconnecting to a Device
When reconnecting to a device that is
still in BluePack's pairing history, the
device that will be in Headset mode
should be powered up rst. Then
when the Master device is turned on, it
will nd the Headset device during its
power up cycle.
Disconnecting from a device
with Bluetooth Wireless
Technology
To disconnect from the Bluetooth
device, simply press the <MFB> and
hold for 5seconds or simply power
the unit off.
When a Bluetooth connection is
dropped or terminated, BluePack
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 pressing the <MFB> for
2seconds.

FAQs 11
FAQs
What is the range of the
Bluetooth transmitter/
receiver?
BluePack will transmit and receive
audio signals up to 65 feet from your
Bluetooth device. The maximum
range of this product is achieved when
a clear line of sight is maintained
between connected devices, but may
also be limited by interference due to
the environment. While this product
offers extended range capabilities,
maximum usable range is limited
by the weaker of the two paired/
connected devices. Transmitting
signals over longer distances will
require more power, therefore you
should keep BluePack as close as
possible to your Bluetooth device to
conserve battery power.
Can I pair my BluePack to
two cell phones and send
my audio to two locations
simultaneously?
No, your BluePack 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?
Based on our tests using a standard
alkaline battery, the battery should
last for >10 hours under normal use.
Lithium batteries can signicantly
increase the battery life, but at a
higher cost. 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.

12 BluePack Wireless Interview Tool
If I have an audio source
connected to the Aux In jack,
will that audio also be present
at the Output mini jack?
No, the stereo mini jack output only
contains audio from the <Mic> input
and the connected Bluetooth device.
This input would be a good place to
add background music or sound clips
during a live interview that is being
sent to your broadcast studio via the
Headset Interface.
Can I send and receive audio
at the same time?
Yes, you can have full duplex
conversations. The stereo line output
contains your microphone audio
on the Left channel and audio from
the Bluetooth device is on the Right
channel.
FAQs
Can I use my Bluetooth
headset with my cell phone
while I have my phone
connected to the BluePack?
No, your cell phone can only be
connected to one Bluetooth enabled
device at a time. In the standard
mode of operation, your cell phone
will be connected to our device as
if the BluePack were a headset.
So you need to use a microphone
and headphones connected to the
BluePack.

FAQs 13
FAQs
Why is the peak LED still red
after I turned down the mic
volume level?
The microphone and Aux Send are
a combined input. If you see this red
LED ashing, you should decrease
the <Mic> and/or <Aux Send> input
levels until the combined input is no
longer clipping.
My BluePack won’t pair with
my cell phone. Why won’t it
accept the PIN?
If this is the rst time you have paired
the BluePack with this cell phone,
make certain you are in Pairing Mode
and not Idle Mode. You must hold
the <MFB> in for approximately 6
seconds to reach Pairing Mode the
rst time you connect.
Can I have full duplex stereo
conversations if my stereo
headset uses A2DP?
No, the A2DP prole is only used for
stereo music streaming. Full duplex
conversations will be in mono.

14 BluePack Wireless Interview Tool
Input Impedance / Level
Female XLR Mic: 2k ohms / -34 dBu nom.
1/8” (3.5mm) Stereo Line: 20k ohms / -10 dBu nom.
Output
1/8” (3.5mm) Stereo: 100 ohms / -10 dBu nom.
Headphone 1/4” Stereo: 8 ohms / ½ watt per channel
Bluetooth (3.0)
Distance: 65 feet (20 meters)
Frequency Response:
Hands-Free (phone): 300 Hz - 3.4 kHz
Hands-Free (HD Voice): 50 Hz -7 kHz
A2DP Mode: 30Hz - 17 kHz
MISC
Power: 9 VDC Battery
Size: 4.7” x 3.75” x 1.65” (12 x 9.5 x 4.2 cm)
Weight: 10 oz (275 g)
Specications
Technical Information