JK Audio innkeeper LTD User Manual
innkeeper LTD
Digital Hybrid
User Guide
JK Audio
Introduction
Innkeeper LTD allows you to send line level signals into the phone
line while maintaining excellent separation between your voice and
the caller. The balanced XLR output jack contains only the caller’s
voice, making this the perfect companion to mixers, consoles, and
PA systems that demand talk show quality audio from a phone line.
The digital hybrid connects audio signals to a standard analog
phone line without the transmit/receive crosstalk common to analog
hybrids. Its Digital Signal Processor (DSP) continuously monitors
both the phone line and audio signals to deliver excellent separation. This proprietary, dual-convergence echo canceller algorithm
can achieve separation typically exceeding 50 dB without any setup
and without sending a noise burst down the line. While this may
sound complicated, it’s all done automatically during every call.
Ready to go?
The innkeeper LTD controls and connectors are clearly marked and
ready for operation. The Features, Setup diagrams and Operation
sections on the following pages will help you answer any minor
questions that you may have. If this is your first exposure to a
hybrid, we suggest that you read the entire manual to allow you to
take advantage of all these features.
Any Questions?
Before you pick up the phone... Please thumb through the rest of
this manual. You might find those deep technical questions are
covered on later pages.
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Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . 4
Features
Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Connecting Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setup diagrams
Studio Mix-Minus Setup . . . . . . . . . . . . . . . . . . . . . . . 8-9
Mix-Minus Explanation . . . . . . . . . . . . . . . . . . . . . . . . . 10
Simple Mix-Minus Setup . . . . . . . . . . . . . . . . . . . . . . . 11
PA System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Alternative to Mix-Minus Setup . . . . . . . . . . . . . . . . . . 12
Operation
Auxiliary Telephone . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Optional Jumper Settings . . . . . . . . . . . . . . . . . . . . . . 13
Auto Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Remote Control Jack . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Optional Guest Module 1 . . . . . . . . . . . . . . . . . . . . . . . 14
FAQs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
FCC Compliance and Registration . . . . . . . . . . . . . . . . . . . . . 18-19
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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Warnings and Safety Precautions
1. Read and keep these instructions.
2. Heed all warnings.
3. Follow all instructions.
4. Clean only with a soft dry cloth.
5. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
6. 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.
7. Do not use this unit if the electrical power cord is frayed or broken. The power cord should be routed so that it is not likely to
be walked on or pinched by items placed upon or against it.
8. To reduce the risk of fire or electric shock, do not expose this
apparatus to rain or moisture.
9. Refer all servicing to qualified service personnel.
10. The following warning symbol may be used elsewhere in this
manual:
The exclamation point within an equilateral triangle is
intended to alert the user of the presence of important
operating and maintenance (servicing) instructions in
the user guide.
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Features—Front View
1 2 3 4
5 6 7
Figure 1: Front View
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1. Call Button - Takes the phone line off hook - press this button
to answer a call or to direct a call from your phone through the
hybrid.
2. OH LED - Lit when you are on line with a call (off-hook). LED
will flicker when you have an incoming call.
3. Drop Button - Press this button to drop (hang up) a call.
4. Send LEDs - Indicate the signal level going out to the phone
line.
5. Power LED - Indicates that the unit is receiving power.
6. Caller LEDs - Indicate the signal level coming in from the
phone line, after the DSP.
7. Send Level - Recessed volume control adjusts the signal that
you are sending down the telephone line.
8. Caller Level - Recessed volume control adjusts the level of the
signal coming in from the telephone line, going out the “Caller”
XLR jack.
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Features—Rear View
9 10 12 13 14 11
Figure 2: Back View
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9. Phone Line - Connect only to a standard, single line, analog
telephone line.
10. Aux. Phone - Connect a single line analog telephone for call
setup / dialing, or producer call screening.
11. Auto Answer - This button enables innkeeper LTD to automatically answer an incoming call and then disconnect after the
caller hangs up. Auto Answer will occur on the first ring.
12. Caller Output - Male balanced XLR line level output contains
only the caller’s voice.
13. Send Input - Female balanced XLR line level input for signals
going out to the phone line.
14. Remote Control Jack - 8-pin modular RJ-45 jack for connection to the optional JK Audio Guest Module 1 Remote Keypad
or your broadcast console switch contacts. Do not connect this
jack to your computer network port.
15. Power - For connection only to the supplied 9VDC regulated
power supply.
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