BlueKeeper Wireless Audio Gateway User Guide JK Audio
Introduction 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 also pairs to Bluetooth equipped sound cards and music players in full bandwidth stereo A2DP mode.
Warnings and Safety Precautions 1. Read and keep these instructions. 2. Follow all instructions and heed all warnings. 3. Clean only with a soft dry cloth. 4. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 5. Do not defeat the safety purpose of the three-prong groundingtype plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 6.
Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Warnings and Safety Precautions . . . . . . . . . . . . . . . . . . . . . 3 Features Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Connection Basic Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Operation Send Signal Level . . . . . . . . . . . . . . . . . . . . . .
Table of Diagrams Figure 1: BlueKeeper Front View . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2: BlueKeeper Rear View . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3: Basic Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4: Studio Mix-Minus Setup . . . . . . . . . . . . . . . . . . . . . .10 Figure 5: Simple Setup for Mixer. . . . . . . . . . . . . . . . . . . . . . . 13 Figure 6: Mono Output to Recorder. . . . . . . . . . . . . . . . . . . .
Features—Front View 1 2 3 8 9 10 11 4 5 6 7 Figure 1: Front View 1. Call Button - Press this button to initiate Bluetooth Idle or Pairing mode, redial an outgoing call or accept an incoming call. 2. Drop Button - Press this button to drop (hang up) a call. 3. Send 1 Level - Adjusts the signal level that you are sending out to the cell phone through the female XLR input. 4. Send 2 Level - Adjusts the signal level that you are sending out to the cell phone through the 3.5mm mini jack input.
Features—Rear View 12 13 14 15 16 17 18 19 Figure 2: Rear View 12. Bluetooth antenna - do not obstruct. 13. Caller Output - Male balanced XLR output contains only the caller’s voice at line level. 14. Send 1 Input - Female balanced XLR input for signals going out to the cell phone. Mic or line level input. 15. 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.
Connection Although each application may require a slightly different setup, the following diagram shows a primary configuration. For a direct connection to BlueKeeper: • Send Audio - Connect a dynamic microphone cable to the Send 1 jack on the BlueKeeper. Be sure to set the Mic/Line button to the “Mic” position.
Operation Send Signal Level The Send LEDs display the signal level as it goes out to the phone caller and can be used as a general guide during setup. The goal is to drive the Send audio at high enough levels to avoid phone line noise, but not so loud as to cause excessive clipping and distortion. Adjust the Send level control so that you occasionally see flashes of the red -3dB peak Send LED. Then place a test call to someone.
Studio Mix-Minus Setup Caller to line level input on mixer Aux Send B (post-fader) on mixer to Send 1 on BlueKeeper, Mic/Line button out (Line) Number of mics depends on mixer Use Main Outputs, USB or Firewire connectors to send audio to recording device or broadcasting equipment inputs Figure 4: Studio Mix-Minus Setup 10
Studio Mix-Minus Setup Following the instructions in the owner’s manual for your audio mixer, connect your microphones, headphones and recording device and set the levels on your mixer. On the front of the BlueKeeper, set the Send 1 and Caller knobs to 12 o’clock. (Send 2 and Headphones are not used in this configuration so they can be turned off).
Mix-Minus Setup for Mixer Why do I need a Mix-Minus Setup? Mix-minus is an audio signal that is designed to avoid feedback and echo in a conference or telephone interface application. When connecting an audio interface to a mixing console, the caller’s audio will be connected to an input channel on the mixer along with all the microphones, music, etc. All of these inputs combine to create the Master mix to be sent to your broadcast, recording device, or the speakers of your PA system.
Connection Simple Setup - Alternate for Mixer Setup Diagrams Caller to any line level input on mixer Aux Send A (pre-fader) on mixer to Send 1 on BlueKeeper, Mic/Line button out (Line) Number of mics depends on mixer Use Main Outputs, USB or Firewire connectors to send audio to recording device For whichever input channel you have the Caller connected to, turn the corresponding Aux A control to minimum (usually hard left).
Connection - Alternate Setup Diagrams Set Mic/Line button In for Mic To Mic input on laptop or other recording device Figure 6: Mono Output to Recorder Recorder or Audio Interface Mic/Line Inputs L Line Outputs Mono/ R Stereo Set to Stereo Figure 7: Stereo Output Interface 14 R L If your microphone is connected to the Left channel input, then use the Left channel output to connect to the BlueKeeper so that only your mic audio goes back to the caller Set Mic/Line button Out for Line
Bluetooth Wireless Technology Bluetooth Profiles 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 bandwidth. BlueKeeper supports A2DP, Hands Free and Headset profiles with BlueCore 5-Multimedia technology.
Connecting to a Bluetooth Device When you power up the BlueKeeper, the blue status LED is not lit as the unit waits for a command. Establishing a Bluetooth connection varies with different cell phones. On your phone, find and select the option to set up a connection. Press and hold the Call/Pair button on your BlueKeeper for a full 3 seconds and release. The blue LED will flash rapidly, about every 100 ms, as BlueKeeper enters Pairing Mode.
Connecting to a Bluetooth Device When bonding is complete, the blue LED will flash at a rate of 1 sec on, 2 sec off. Once BlueKeeper has been added to your cell phone, subsequent connections can be made more quickly from Idle mode. When the unit is placed in Idle mode, it will search its connection history and automatically connect to the last device that is available.
FAQs ? ! What is the range of the Bluetooth transmitter/receiver? BlueKeeper will transmit and receive audio signals up to 15 feet (5 meters) from your Bluetooth device. ? ! Can I send and receive audio at the same time? Yes you can! You can have full duplex conversations with your microphone sent to the Left channel of the stereo line output and the Bluetooth audio sent to the Right channel.
FAQs ? ! ? ! How can I send more audio to the caller without lighting the red -3 dB LED? Cell phones have different audio levels so the Send control knob and the Send LEDs will respond differently. Use the Send LED meter as a general guide, then you may need to readjust for a comfortable listening level without distortion. See page 9. What is the difference 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.
Specifications Inputs Send 1: Send 2: Outputs Caller: Balanced Female XLR,1k ohms, 15 mV RMS (-34 dBm nominal) Mic/Line pad switch, Line = +6 dBu max. Unbalanced 1/8 “ (3.5 mm) mono, 20k ohms 250 mV RMS (-10 dBu nominal) Balanced Male XLR, 200 ohms, 500 mV RMS (-4 dBu nom, +14 dBu max.) Stereo Out: Unbalanced 1/8 “ (3.5 mm) stereo, 50 ohms 250 mV RMS (+6 dBu max.) Left = Send Right = Caller Mono Out: Unbalanced 1/8 “ (3.5 mm) mono, 50 ohms 15 mV RMS (-34 dBu nom.
Block Operation Diagram (continued) Figure 9: Block Diagram 21
Notes 22
FCC Part 15 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.
Warranty BlueKeeper is covered by a 2-year warranty to be free from defective workmanship and materials. In the event that the BlueKeeper 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.
