JK Audio BlueKeeper User manual

JK Audio
User Guide
BlueKeeper™
Wireless Audio Gateway

ii BlueKeeper™ Wireless Audio Gateway
Welcome
Thank You
Thank you for purchasing a JK Audio BlueKeeper Wireless Audio Gateway.
Please read this guide for instructions on setting up and using your new product.
Getting Assistance
If you have technical or application questions,
call us M-F: 8:30am-5:00pm (CT)
In the US & Canada (Toll-Free)
800-552-8346 All other countries: 815-786-2929
Email us at:
[email protected]
Or check out our FAQ section for answers to common questions.
Limited Warranty
The BlueKeeper is covered by a 2 year warranty to be free from defective work-
manship 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.

Contents
Overview 1
Getting to know your BlueKeeper
2Controls & Indicators
4Inputs & Outputs 2
Getting Connected 6
Bluetooth Wireless Technology 8
FAQs 10
Technical Information 12
Contents iii
Contents

iv BlueKeeper™ Wireless Audio Gateway
HD Voice (Wide-Band Speech)*
Bluetooth Wireless Technology
Send XLR Line Input
Mic/Line Switch
3.5mm Stereo Line Input
3.5mm Mono Line Input
Caller XLR Line Output
3.5mm Stereo Line Output
3.5mm Mono Mic Level Output
3.5 mm Stereo Headphone Jack
Send and Caller Signal Level LEDs
Send and Caller Volume Controls
Universal Power supply with
detachable cord
Features
In the Box
Features
HD Voice
While standard phone calls have a narrow
bandwidth of 300 Hz to 3.4 kHz, HD Voice
calls o󰀨er 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
HD Voice is available on many third party
headsets and cell phones. 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.

Overview 1
Introducing the BlueKeeper
JK Audio combines Bluetooth Wireless Technology with professional audio
electronics in a convenient desktop design. BlueKeeper pairs to your cell
phone like a Bluetooth wireless headset. Connect your favorite microphone and
headphones for dramatically improved sound quality at both ends of the call.
BlueKeeper allows you to send mic and line level signals into your wireless
phone while maintaining excellent separation between your voice and the caller.
The stereo output jack provides your voice on one channel and only the caller’s
voice on the other channel. The balanced XLR output jack contains only the
caller’s voice.
The 3.5 mm stereo line input jack allows recordings to be sent into the Bluetooth
device. The 3.5 mm stereo line output jack provides your full bandwidth
send mix on the left channel and Bluetooth caller audio on the right channel.
The headphone output gives you a mix of the XLR input, 3.5 mm input, and
Bluetooth audio.
Ready to go?
The BlueKeeper controls and connectors are clearly marked and ready for
operation. If this is your rst exposure to a hybrid, we suggest that you read the
entire manual to allow you to take advantage of all these features.
Overview

2BlueKeeper™ Wireless Audio Gateway
Getting to Know Your BlueKeeper
3 4 5 6 71
8 9
2
10 11
1. Call/Pair Button
Use this button to control the access Bluetooth functions, answer incoming
calls or redial the last number called.
2. Drop Button
Press this button to drop (hang up) a call.
3. Send 1 Level
Adjusts the signal level that you are sending into the phone call, through the
female XLR input.
4. Send 2 Level
Adjusts the signal level that you are sending into the phone call, through the
3.5mm mini jack input.
5. Caller Level
Adjusts the level of the incoming caller’s audio as it is going out the output
jacks.
6. Headphone Level
Adjusts the signal level coming from the 3.5mm front panel headphone jack.
7. Headphones
The 3.5mm stereo headphone jack contains a mix of both the Send input
audio and the Caller audio.
Controls & Indicators

Controls & Indicators 33
Getting to Know Your BlueKeeper
Indicators Cont’d
8. Bluetooth LED
Indicates Bluetooth Status (see page 8).
9. Send LEDs
Displays the signal level sent to the caller. The goal is to drive the send
audio at levels high enough to avoid noise, but not so loud as to cause
excessive clipping. Adjust the <Send> level controls so that you rarely
see ashes of the red -3 dB peak Send LED. These ashes should occur
only during loud speech bursts. If the red LED stays lit for extended
periods you can assume that much of your speech is being clipped or
distorted. In this case you should lower the <Send> volume control for the
input that is causing the clipping.
The <Send 1> volume control will set the level of any audio connected
to the <Send 1> XLR jack on the back of the BlueKeeper. The <Send 2>
control will set the level of the <Send 2> mini jack on the back of the
BlueKeeper. These two inputs will be combined on the LED meter and on
the Left channel of the stereo output mini jack.
10. Power LED
Lit when unit is plugged in and receiving power.
11. Caller LEDs
Displays the signal level coming in from the cell phone, after the DSP.
This signal level will not change when you adjust the <Caller> knob. If
you see the red -3 dB peak Caller LED light more than occassionally,
you should lower the volume on your cell phone to avoid overdriving
and distortion.
The <Caller> level control knob does not change what you see on these
LEDs. Adjust the <Caller> level control to give you the best signal level
at the <Caller> XLR output or the right channel of the stereo output
mini jack.
You can listen to the combined audio level in your headphones. After
setting the Send levels for the highest level you can send without
distortion as indicated by the LED meter, listen to the audio in your
headphones and set the <Caller> level to match the Send level. Or if your
recording device has a meter, you can use that to match the <Caller>
level to the Send level.

4BlueKeeper™ Wireless Audio Gateway
Getting to Know Your BlueKeeper
Inputs & Outputs
1. Bluetooth Antenna
Do not obstruct.
2. Caller Output
Male balanced XLR output contains only the caller’s voice.
3. Send 1 Input
Female balanced XLR input for signals going out to the cell phone.
Mic or line level input.
4. Mic / Line switch
Sets the front end sensitivity of the Send 1 XLR jack. Set to <Mic> if you
intend to connect a dynamic microphone directly to the Send 1 jack. Set to
<Line> if you are connecting to the output of a mic mixer.
5. Send 2 Stereo Input
3.5 mm <Stereo In> mini jack for signals going into the cell phone.
Line level.
3 4 5 6 7 81 2

5
Inputs & Outputs Cont’d
6. Stereo Output
3.5 mm <Stereo Out> mini jack contains both Send and Caller audio
channels with levels determined by the <Send 1> and <Send 2> level
controls and the <Caller> level control. Left channel contains your local
Send audio and right channel contains the Caller’s audio from the cell
phone.
7. Mono Output
3.5 mm <Mono Out> mini jack contains a mix of <Send 1>, <Send 2>
and <Caller> audio with levels controlled by each of the input control
knobs on the front of the unit. This output is at Mic level and is suitable for
connecting to the Mic input on a computer or other recording device.
8. Power Jack
For connection only to the supplied 9VDC regulated power supply.
Inputs & Outputs 5
Getting to Know Your BlueKeeper

6BlueKeeper™ Wireless Audio Gateway
Getting Connected
Note: There are 2 ways to set up the audio equipment for BlueKeeper.
• If you are only using one mic, please continue to Step 3.
• If you are using a mixer with two or more mics, please skip to Step 6.
Setting up for One Mic/Headphone (No Mixer)
1. Connect a dynamic microphone cable to the <Send 1> jack on the hybrid.
Be sure to set the BlueKeeper <Mic/Line> switch to the <Mic> position.
2. Connect a headphone to the front of the BlueKeeper.
3. Connect a stereo cable from the mini-jack <Stereo Out> on the BlueKeeper
to the <Line In> on your computer sound card or other recording equipment
that has a stereo input. Continue to Step 12.
Setting up for two or more Mics and a Mixer (Mix Minus Caller)
Note: A mix-minus signal is an audio signal that contains a mix of your local microphones plus
any other audio, minus the Caller’s own voice. Sending the Caller’s audio back to the BlueKeeper
will cause an echo, or feedback.
4. Connect the BlueKeeper <Caller> output to any Line input on the mixer.
5. Connect microphone(s) to the mic inputs on your mixer.
6. Connect the mixer’s Mix-Minus bus or Aux Send output (this may be labeled
FX or Mon but any Aux bus will work) to the <Send 1> input on BlueKeeper.
Set the BlueKeeper <Mic/Line> switch to the Line position.
7. If your mixer doesn’t have a mix-minus bus: Whichever input channel
you have the <Caller> connected to, turn the corresponding Aux control to
minimum. All Aux controls for other channels should be set for audio sent
to the phone line. Each Aux Send bus is completely separate from all other
outputs, so these Aux controls will not a󰀨ect what is heard on the Main
outputs or on any other Aux buses.
Tip: Using anAux Send bus that is Pre-Fader allows you to control the levels of each
channel to the main output without a󰀨ecting what is sent to the phone call.
Recording
Device
Set to <Mic>
12
3
1
5
10

77
Getting Connected
8. Connect your headphones to the mixer.
9. Use Main Outputs to send audio to recording device or broadcasting
equipment inputs.
Completing Setup
10. Connect the supplied DC power supply to the back of the BlueKeeper and
then to an AC power outlet.
11. Adjust the <Send> level controls so that you consistently light the green
-20 dB and -9 dB and rarely light the red -3 dB peak Send LED. These
ashes should occur only during loud speech bursts. If the red LED stays
lit for extended periods you can assume that much of your speech is being
clipped or distorted. Set the <Caller> control for good recording level of the
caller audio at the output jack.
12. Finally, pair to your Cell Phone (see page 9).
Mic 1 Mic 2 Mic 3 Mic 4
Aux
L
R
Main Mix Out
Pre
/Mon
Post
/FX
Headphones
+-
Pre
/Mon
Aux
+-
Pre
/Mon
Aux
+-
Pre
/Mon
Aux
+-
Pre
/Mon
Aux
+-
Pre-Fader
(Mon)
L
R
+-
Post
/FX
+-
Post
/FX
+-
Post
/FX
+-
Post
/FX
+-
Post
/FX
Aux SendLine In 5/6
Recording
Device
Mix Minus Caller
Caller
Set to <Line>
4
6
7
10
98
5
12

8BlueKeeper™ Wireless Audio Gateway
When attempting to put the unit into Idle or Pairing mode, you should
power the unit o󰀨 then back on (by disconnecting and reconnecting the
power cord) before pressing the <Pair> button.
Note: If you put the unit into the wrong state due to releasing the <Pair> button at the wrong time,
holding the <Pair> button for “X” seconds will not put it into the desired mode.
Pairing Mode
Hold the <Pair> button for 5seconds, then release to activate Pairing Mode.
Once the pairing process is complete, the unique device ID of the paired device
is stored in Bluekeeper’s Connection History. Subsequent connections can be
made from Idle Mode.
In Pairing Mode, any Bluetooth enabled device within range can pair with your BlueKeeper. 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.
Idle Mode
Hold the <Pair> button for 2seconds, then release to activate Idle Mode.
In Idle Mode, BlueKeeper searches for paired devices.
Connected Mode
After bonding is complete, the connection to that device is secure.
BlueKeeper returns to Idle Mode when a connection is dropped or terminated.
Bluetooth Status LED
The blue LED on the top of the unit ashes in di󰀨erent sequences to indicate the
current connection status.
Pairing
100ms o, 100ms on 0 1s 2s 3s 4s 5s 6s
Idle
2s o, 200ms on 0 1s 2s 3s 4s 5s 6s
Connected
2s o, 1s on 0 1s 2s 3s 4s 5s 6s
HD Connected
2s o, 4s on 0 1s 2s 3s 4s 5s 6s
Bluetooth Wireless Technology

Bluetooth Wireless Technology 9
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. Connect BlueKeeper to power, then hold the <Pair> button for 5full seconds.
After you release the <Pair> button, the blue LED should ash rapidly if
BlueKeeper 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
"JKBKxxxx" 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 o, 1sec
on (2 seconds o, 4seconds on for HD mode). Once BlueKeeper has been
added to your cell phone, subsequent connections can be made more quickly
from Idle Mode.
Placing a call with BlueKeeper
1. To place an outgoing call, dial the number on your cell phone and the call will
be active on BlueKeeper. To redial the last number or answer an incoming call,
press the <Call> button.
2. When your call is completed, press the <Drop> button on BlueKeeper.
Note: If you do not hear your cell phone ring, you may need to check the Bluetooth headset
settings on your phone. The phone may send a beep to your headphone instead of ringing to
indicate an incoming call.
Disconnecting from a device with Bluetooth
Wireless Technology
To disconnect your cell phone, disconnect the Bluekeeper from your phone’s
Bluetooth menu, turn o󰀨 Bluetooth on your phone, power o󰀨 your phone or
BlueKeeper, or take the cell phone out of range.
Connection History
BlueKeeper retains a history of the 16 most recent devices. To clear the
connection history and return to factory reset, from the power o󰀨 state, hold the
<Call> button in for at least 20 seconds. The Bluekeeper will clear the history and
then go into Pairing mode.
Bluetooth Wireless Technology

10 BlueKeeper™ Wireless Audio Gateway
1. What is the range of the Bluetooth transmitter/receiver?
BlueKeeper will transmit and receive audio signals up to 66 feet (20 meters)
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
o󰀨ers extended range capabilities, maximum usable range is limited by the
weaker of the two paired/connected devices.
2. Will the digital hybrid provide phantom power for a
condenser mic?
No, this device will not provide phantom power. If you connect a microphone
directly to the BlueKeeper, you should use a dynamic mic.
3. Why is there a Send 2 mini-jack on the back of my
BlueKeeper?
This is a second line level input to the BlueKeeper. Here you can connect
another device, such as a MP3 player or computer, to add audio to the
conversation. This enables you to play background music or other sound
bites during your discussion. Do not connect a microphone to this jack.
4. How do I record onto my computer and edit the les?
You will need to purchase or download any audio editing software of your
choice. You may also need to edit the audio conguration les on your
computer or in your software to allow recording in stereo. BlueKeeper just
enables you to access the audio from your cell phone or other connected
Bluetooth device.
5. Why does my laptop only record half of the conversation? I
am using the Stereo output on the BlueKeeper and I have a
stereo cable.
Many laptop computers only have a mic input, which is mono. If you want
to record 2 track stereo audio, you will need to either get a sound card with
a stereo line level input for your laptop or use a USB or FireWire interface
product. However, the BlueKeeper has a mono, mic level output that can
be connected directly to the mic input of your laptop if available. This will
allow both sides of the conversation to be recorded onto one mono track
in your software. This jack will not work with a TRRS headset jack on your
laptop/tablet.
6. Why does my laptop / tablet not receive audio from the
Bluekeeper for recording?
Many newer laptops / tablets only have a TRRS headset jack. If you want
to record 2 track stereo audio, you will need to either get a sound card
with a stereo line level input for your laptop or use a USB or FireWire
interface product.
If you would like to record from the mixed Mono Out of Bluekeeper, you will
need to get an appropriate TRRS to mic / headphone adapter.
FAQs

FAQs 1111
7. There is a loud hum on the output of my BlueKeeper, even
when nothing else is connected. What else could it be?
Make certain you are using the regulated power supply that was shipped
with this unit. Power supplies are not all the same.
8. Can I still use my phone to take regular calls or do I have to
disconnect the BlueKeeper when I am not using it?
If you would like to use your phone normally while it is connected to the
BlueKeeper, you will need to select “Handset” or “Speaker” from the
phone’s call menu instead of “Bluetooth”. This will allow you to have a
conversation on your phone without the audio being routed via Bluetooth to
the BlueKeeper.
9. Can I pair my BlueKeeper to two cell phones and send my
audio to two locations simultaneously?
No, a BlueKeeper can only be connected to one mobile device with
Bluetooth Wireless Technology at a time.
10. What is the di󰀨erence between Mic Level and Line Level?
Mic level is typically 20-30 dB lower than Line level and needs a pre-amp
to bring it up to Line level. While many audio recording or playing devices
will have an 1/8” input, it is important for you to know what type of input it is.
Usually a mic input will be mono and will use a pre-amp circuit, and a line
input will be stereo.
Check your cable also to be sure it is compatible with the type of input/
output you are using. A stereo mini cable will have two black rings and a
mono cable will have one black ring on the plug. On many mixing consoles,
the XLR input will be mic level and the 1/4” TRS inputs will be line level.
11. My Bluetooth device has the latest Bluetooth version
(Bluetooth 4.0) but your product does not. Will there be a
compatibility problem?
No, the latest Bluetooth version should be backwards compatible with older
Bluetooth versions.
12. I have a stereo mixer with no Aux bus and only one set of
outputs. How do I create a mix-minus setup?
If your mixer does not have an Aux Send bus, you can use Pan controls
with the Left and Right outputs. Pan the Caller to the Right output. Then
connect only the Left output to the BlueKeeper <Send 1> input. Leave
the microphones panned to the middle and send the Right channel output
containing the mixed audio to your recording device.
Instead, you may also send the mix-minus signal from the L channel RCA
output to the <Send 2> input if necessary.
FAQs

12 BlueKeeper™ Wireless Audio Gateway
Technical Information
Input Impedance / Level
Balanced Female XLR: 1k ohms / 15 mV RMS; -34 dBu nom.;
Mic/Line Pad Switch = +6 dBu max
1/8” (3.5mm) Stereo: 20k ohms / 250 mV RMS; -10 dBu nom.; +6 dBu max
Output
Balanced Male XLR: 200 ohms / 500 mV RMS; -4 dBu nom.;
+14 dBu max; Caller Only
1/8” (3.5mm) Mono: 50 ohms / 15 mV RMS; -34 dBu nom
Mixed Send and Caller
1/8” (3.5mm) Stereo: 50 ohms / 250 mV RMS; -10 dBu nom; +6 dBu max
Left = Send; Right = Caller
Headphone 1/8” Stereo: 8 ohms / ½ watt per channel
Mixed Send and Caller
Bluetooth Wireless Technology
Standard: Bluetooth 3.0
Range: 66 ft (20 meters)
Frequency Response: Hands-Free (Full Duplex): 300 Hz– 3.4 kHz
Hands-Free (Full Duplex HD Voice): 50 Hz– 7 kHz
Misc.
Isolation: 1500 VAC
Power: 120-240 VAC Power Supply
Size: 7” x 6” x 1.6” (18 x 15 x 4.2 cm)
Weight: 2.2 lbs. (1kg)
Specications

13
Block Diagram 13
Technical Information
Block Diagram
JK Audio BlueKeeper Simplified Block Diagram January 12, 2009
XLR
Input
3.5 mm
Line Input
3.5 mm
Stereo Line
Output
Headphone
Bluetooth
L
R
L
R
Mic / Line
Caller
3.5 mm
Mono Mic
level Output
Send 1
Level
Send 2
Level Headphone
Level
Caller
Level

14 BlueKeeper™ Wireless Audio Gateway
FCC Part 15 Subpart A Compliance
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications.
Operation 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 modications not expressly approved by JK Audio can void the user’s
authority to operate the equipment.
FCC Compliance Notice

15
Declaration of Conformity 15
Manufacturer’s Name:
Manufacturer’s
Address:
JK Audio, Inc.
1311 E 6th Street
Sandwich, Illinois 60548 USA
Declares that the product:
Product Name:
Model Numbers: BlueKeeper WirelessAudio Gateway BlueKeeper
Conforms to the following Product Specications:
Safety:
ESD:
Emissions:
Bluetooth Radio:
CAN/CSA-C22.2 No. 60950-01-03
UL Standard 60950-01 1st edition
EN 61000-3-2, 3-3, 4-3, 4-4, 4-5, 4-6, 4-11
EN 301 489-17 V1.2.1
EN 55022:2006
AS/NZS CISPR 22: 2006
ETSI EN 300.328 V1.6.1: 2000
FCC Part 15, Subpart B
ICES-003
EN 300.328
FCC Part 15.247
FCC ID QOQWT32AE
IC 5132A-BGTWT32AE
The product herewith complies with the requirements of the following Directives and
carries the CE marking accordingly:
R&TTE 1999/5/EC
EMC 89/336/EEC, 92/31/EEC, 93/68/EEC
RoHS Directive 2015/863
The Technical File containing supporting documentation is maintained at:
JK Audio, Inc (Corporate Headquarters)
Compliance Manager
1311 E 6th Street
Sandwich, Illinois 60548 USA
815-786-2929 phone
815-786-8502 fax
Declaration of Conformity
Declaration of Conformity

© 2019 JK Audio, Inc. All rights reserved.
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.
JK Audio, Inc.
1311 E 6th St.
Sandwich, IL 60548
United States
Telephone: [phone]
Toll Free: 1.800.jkaudio
Fax: [phone]
www.jkaudio.com
BlueKeeper™
Wireless Audio Gateway
User Guide Version 6/26/19
JK Audio