JK Audio BluePack User manual

The model BluePack is covered by a 2 year
warranty to be free from defective workmanship
and materials. In the event that the BluePack
needs repair, you must call us to get an
authorization, and then carefully pack and ship
it to us. You will pay for shipping to us and we
will pay for return back to you, UPS ground. No
free repairs will be made if the defect was
caused by misuse, weather conditions, or other
cause, except for defective workmanship or
materials.
THERE ARE NO EXPRESSED OR IMPLIED
WARRANTIES WHICH EXTEND BEYOND
THE WARRANTY HERE MADE.
Warranty
8/08
JK Audio, Inc. 1311 E 6th Street, Sandwich, IL 60548 USA
Voice: [phone] Toll Free: 800-JK-Audio
Fax: [phone]
[email protected] www.jkaudio.com
Copyright ©2008 JK Audio, Inc. All rights reserved.
BluePack
Wireless Audio Interface
JK Audio
User Guide
peak

2
BluePack allows live man-on-the-street interviews
through a cell phone that is equipped with Blue-
tooth* Wireless Technology. This sleek belt pack
provides a professional look and feel to field report-
ers and remote talent.
BluePack pairs to your cell phone like a Bluetooth
wireless headset. This professional microphone
preamp and powerful headphone amplifier make
sure the message gets through. A 3.5 mm stereo
line input jack allows recordings to be mixed into
the broadcast.
* The Bluetooth word mark and logos are owned by
the Bluetooth SIG, Inc. and any use of such marks
by JK Audio, Inc. is under license. Other trademarks and
trade names are those of their respective owners.
Description
19
FCC-B Part 15 Compliance
This device has been tested and found to comply
with the limits for a Class B digital device, pursuant
to Part 15 of the FCC rules. These limits are de-
signed to provide reasonable protection against
harmful interference when the equipment is oper-
ated in a commercial environment. This equipment
generates, uses and can radiate radio frequency
energy and, if not installed and used in accor-
dance with the instruction manual, may cause
harmful interference to radio communication. Op-
eration of this equipment in a residential area is
likely to cause harmful interference, in which case
the user will be required to correct the interference
at his/her own expense.
Changes or modifications not expressly approved
by JK Audio can void the user's authority to
operate the equipment.
Shielded interface cables and AC power cord, if
any, must be used in order to comply with the
emission limits.
The internal antennas used for this mobile trans-
mitter must not be co-located or operated in con-
junction with any other antenna or transmitter.

18
Inputs:
Female XLR: Balanced, 2k ohms,
-35 dBu nom.
Stereo Line In: Unbalanced, 3.5mm,
20k ohm, -10 dBu nom.
Outputs:
Stereo Line Out: Unbalanced, 3.5mm,
100 ohms, -10 dBu nom.
Left: Mic at line level
Right: Bluetooth return
Headphone mode: 8 ohms, 1 watt per
Channel
Bluetooth
Standard: Bluetooth 2.0
Distance: 30 feet (10 meters)
Frequency response
Hands Free mode: 300 Hz - 3400 Hz
Headset mode: TX 30 Hz - 17 kHz
RX 30 Hz - 20 kHz
Power: One 9-volt battery
Size: 4.7” x 3.75” x 1.65”
(12 x 9.5 x 4.2 cm)
Weight: 10 ounces
Specifications
3
Safety Precautions
BluePack contains a headphone ampli-
fier that is more powerful than a con-
sumer 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 track-
side 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 pedes-
trian crossings.
Note: While BluePack was designed to be very rug-
ged and durable, it is not waterproof and care
should be taken to keep the unit dry.

4
Features
1. This thumbwheel will control the level of your
microphone input.
2. The peak LED indicates clipping on the input
channel if the level is set too high. The micro-
phone and Aux Send are a combined input. If
you see this red LED flashing, you should de-
crease the Mic and/or Aux Send input levels.
3. This control will adjust the level of audio from
the 3.5 mm Aux Send input jack.
1 2 3 4 6 75
9 8
peak
17
FAQs
?If I have an audio source connected to the Aux
Send input, 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 Bluetooth source. 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 over your
Bluetooth connection.
?Can I send and receive audio at the same
time?
!Yes you can! You can have full duplex conversa-
tions with your microphone sent to the Left chan-
nel of the stereo line output and the Bluetooth au-
dio sent to the Right channel.
?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 flashing, you
should decrease the Mic and/or Aux Send input
levels until the combined input is no longer clip-
ping.

16
?What is the range of the Bluetooth transmit-
ter/receiver?
!BluePack will transmit and receive audio signals
up to 30 feet (10 meters) from your Bluetooth de-
vice. Because transmitting signals over longer
distances will require more power, you should
keep BluePack as close as possible to your Blue-
tooth device to conserve battery power.
?Can I pair my BluePack to two cell phones
and send my audio to two locations simulta-
neously?
!No, your BluePack can only be paired to one
Bluetooth enabled device at a time.
?How long will the battery last?
!Based on our tests using a standard alkaline bat-
tery, with BluePack about 1 meter from a Blue-
tooth device the battery should last for about 10
hours under normal use. Lithium batteries can
significantly 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 ex-
hausted and the unit shuts down.
FAQs
5
Features
4. This LED flashes red when the BluePack has a
stereo listen-only audio connection to your
Bluetooth device. If the music is paused, such
as when you receive an incoming phone call or
the music player is shut off, the red stereo LED
will turn off until the music resumes playing.
5. This LED flashes blue when setting up or using
a Bluetooth connection. See page 11 for timing
diagrams. The LED will illuminate briefly when
the unit is first powered on.
6. The Headphones control will set the level of
audio sent to the headphone output jack.
7. This red LED indicates when the power is
turned on.
8. Press this Power button in to activate the unit.
Press again to turn the unit off.
9. The blue Multi-Function Button (MFB) is used
to establish a connection with your Bluetooth
enabled cell phone, laptop or other device.

6
Connection
1. Connect your headphones to this 1/4” jack.
The 1 watt stereo headphone output gives you
a mix of the XLR mic input, 3.5 mm Aux Send
input and Bluetooth audio.
2. The unbalanced 3.5 mm stereo fixed line level
output jack provides your full bandwidth micro-
phone signal on the left channel and Bluetooth
audio on the right channel.
Like any phone call, live interviews are limited
to 3.4 kHz voice bandwidth back to the station.
This stereo output jack allows you to make a
full bandwidth recording using your favorite re-
corder for transfer back at the station or over
the web.
3. Connect the output of your other audio equip-
ment to this unbalanced stereo 3.5mm Aux
Send jack. This enables you to add back-
ground music or sound clips to your Bluetooth
broadcast. This audio is not present at the Ste-
reo Output but will be sent to the Headphone
jack.
15
Block Diagram
L R

14
Applications
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.
Portable
recorder
7
Connection
4. 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 un-
balanced 3.5 mm inputs simultaneously. The
line level Aux Send input allows recordings to
be mixed into the broadcast with your micro-
phone to be sent out through your Bluetooth
connection.
1 2 3 4

8
Bluetooth Wireless Technology
Establishing a Bluetooth connection varies with dif-
ferent cell phones. On your phone, find and select
the option to set up a connection. Press and hold
the blue button (Multi-Function Button or MFB) on
BluePack for a full 5 seconds and release. The blue
LED will flash rapidly, about every 100 ms, as
BluePack enters Pairing Mode.
There is a difference between “Pairing Mode” and
“Idle Mode”. The very first time you connect to a
new device you must be in Pairing Mode. When you
hold the Bluetooth MFB in for 2 seconds and re-
lease, the blue LED will come on steady for a mo-
ment, then it will flash at a rate of 200 ms on and 2
seconds off. This first stage is Idle Mode. Holding
the MFB in for 5 seconds before release will acti-
vate pairing mode. In pairing mode the LED flashes
rapidly, about every 100 ms. Once in pairing mode,
any Bluetooth enabled device within range can pair
with BluePack. After pairing is complete, the con-
nection to that device is secure.
Now go to your Bluetooth device and search for
Bluetooth connections. If this is the first time you
have paired with this device, select the option to
add an audio device. When the cell phone has
13
Applications
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.
Audio
Console

12
Applications
Live Man-on-the-Street Broadcasts
Cover that breaking news story, conduct live inter-
views from the convention floor or broadcast play-
by-play action from the football field.
Connect your microphone and headphones to the
BluePack as shown, then establish a Bluetooth
connection to your wireless phone. Dial up the stu-
dio and you are ready to go. Add pre-recorded
sound clips or background music to your interviews
through the Aux Send input.
Portable
audio
player
9
Bluetooth Wireless Technology
found the new device, select from the list the device
ID of "JKBPxxxx" where the “xxxx” corresponds to
the last 4 digits of the unit’s serial number. Enter
“Yes” when asked to Bond with this device. Enter
the pin number as "0000". The BluePack can main-
tain up to 16 devices in its connection history to
make reconnecting to a previously used device sim-
pler and quicker.
When bonding is complete, the blue LED will flash
at a rate of 1 sec on, 2 sec off. Once BluePack has
been added to your cell phone, subsequent con-
nections can be made more quickly from Idle Mode.
To disconnect from the Bluetooth device, simply
press the MFB and hold for 5 seconds. Depending
on the model of cell phone, if left unused in Idle
Mode or if a live call is disconnected, the BluePack
may automatically disconnect Bluetooth.
To clear the connection history and return to factory
reset, hold the MFB button in for at least 20 sec-
onds. After resetting, the BluePack will return to
pairing mode.

10
Bluetooth Wireless Technology
The Bluetooth interface will first attempt to connect
in Hands Free mode to a cell phone, allowing 3.4
kHz telecom bandwidth. If this is not available, it
will attempt to connect in Wireless Headset mode
to any product, such as a laptop computer, that
allows a Bluetooth wireless audio connection. The
Wireless Headset mode offers 20 kHz audio band-
width.
BluePack supports A2DP (Sink), Hands Free and
Headset profiles with BlueCore 5-Multimedia tech-
nology. You will be able to receive full bandwidth
stereo audio from any cell phone that supports
A2DP.
While all phones and portables are different, typi-
cally if you connect in cell phone Hands Free
mode, you will have a mono full duplex connec-
tion. If you connect to a music player, you will be
in stereo mode. Consult your cell phone or port-
able device for more details.
11
Bluetooth LED pattern after Bonding
Bonded
2 seconds off,
1 second on
Idle Mode
2 sec off,
200 ms on
Initialize
2 sec off,
2 sec on
Bluetooth LED pattern to initiate Bonding
Pairing Mode
100 ms off,
100 ms on
Bluetooth Wireless Technology
Hold Bluetooth MFB in at least 5 sec
to reach Pairing Mode the first time
a new device is connected,
> 2 sec thereafter to easily
connect from Idle Mode