JK Audio innkeeper 1x, innkeeper 1rx User Manual

innkeeper 1x

innkeeper 1rx

Digital Hybrid

JK Audio

User Guide

2

Introduction

Innkeeper 1x and innkeeper 1rx will allow you to send and receive
audio over analog telephone lines. While this may seem like a simple
task that any telephone can do, the challenge is getting the best
quality audio from such a miserable audio path.

What is a Digital Hybrid?
A digital hybrid connects audio signals to standard analog telephone
lines without the variation in quality found with analog hybrids. The
main function of a hybrid is to bring in the caller’s voice from the phone
line as clear and clean as possible. In the real world, when you send
your voice down the telephone line it has a tendency to bleed over into
the caller’s audio. The hybrid must adapt to the phone line to properly
separate transmit and receive audio. We use a 16 bit DSP (Digital Sig­nal Processor) to continuously monitor the phone line and audio
signals and deliver excellent separation. Our dual-convergence
algorithm can achieve excellent trans-hybrid loss, typically exceeding
50 dB, without any setup.

Ready to go?
The innkeeper 1x/1rx controls and connectors are clearly marked and
ready for operation. The innkeeper 1x comes in a desktop case and
the innkeeper 1rx has a rack mountable case. All features and opera­tion are the same. The Features diagrams will help you pinpoint 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.

1 2 3 4 5 6 7 8

9 10 11 12 13

Features—Front View

14 15 16

3

Features—Front View

1 Call Button - Press this button to answer or place a telephone call

(takes the line off-hook).
2 Drop Button - Press this button to drop (hang up) a call.
3 Send Level - Adjusts the signal that you are sending down the

telephone line.
4 Caller Level - Adjusts the level of the signal coming in from the

telephone line, going out the “Caller” jack.
5 Send > Mix Level - Adjust the level of your audio that will be sent to

the “Mix Out” jack.
6 Mix < Caller Level - Adjusts the level of caller audio that will be

sent to the “Mix Out” jack.
7 Headphones - The stereo headphone jack contains the signal that

you have created with the send> mix level and caller> mix level

controls. Both left and right channels get the same signal.
8 Mix Monitor - Adjusts the mix signal level sent to the headphone

and rear panel speaker terminals.
9 Ring LED - Flickers when you have an incoming call.
10 OH LED - Lit when you are on line with a call (off-hook).
11 Signal LEDs - Send LEDs represent the signal level going out to

the telephone line. Receive LEDs represent the signal level coming

from the phone line, after the DSP.
12 AGC - press this switch to allow the innkeeper 1x/1rx to automati-

cally adjust the gain of caller audio.
13 Caller Ducking - press this switch to lower the caller’s audio level

by 9 dB when local audio is present.
14 Presence - press this switch to boost the low end of the caller audio

signal. Presence is added to the caller audio signal only.
15 1 kHz tone generator - press switch once to send a full scale 0 dB,

maximum output level 1kHz tone down the phone line, press again

to send this signal out the Caller jack, press a third time to turn off.
16 Auto-Answer - Press this switch to enable the innkeeper to auto-

matically answer an incoming call and then disconnect after the

caller hangs up. Auto answer will occur on the first ring.

4

Features—Rear View

17 Caller Output - Male balanced XLR output contains only the

callers voice.

18 Mix Output - Male balanced XLR output contains a mix of send

and receive audio determined by the Send > Mix level and Mix <
Caller level controls.

19 Send Input - Female balanced XLR input for signals going into

the phone line. Mic or line level input.

20 Remote Control Jack - 10 pin RJ-50 modular jack for

connection to the RS-232 cable, the optional JK Audio RIU-IP
remote interface or the optional JK Audio Guest Module 1
Remote Keypad.

21 AC Power - Universal AC power input for 100-240 Volt, 50-60

Hz supply current.

22 Phone Line - Connect to a standard, single line, analog

telephone line.

23 Aux. Phone - Connect a single line analog telephone for call

setup / dialing, or producer call screening.

24 Mic / Line switch - Sets the front end sensitivity of the Send

XLR jack. Set to Mic if you intend to plug a dynamic microphone
directly to the Send jack. Set to Line if you are connecting to a
mic mixer. This device does not provide phantom power for a
condenser type microphone.

25 Remote Terminals - Screw terminals provide connections for a

small speaker, remote LEDs, tape recorder control, or console
call control switches.

22 24

25

17 18 19 20

21

23

5

Connection—Mix-Minus Setup

Number of mics
depends on mixer

Caller to any
line level input

Aux Send to Send 1,
Mic/Line button out (Line)

Use Main Outputs,
USB or Firewire
connectors to
send audio to
recording device,
or broadcasting
equipment inputs

For whichever input channel you have the Caller connected to, turn the
corresponding Aux control to minimum (usually hard left). All other Aux
controls should be set for what you want to send to the phone line. Each
Aux Send bus is completely separate from all other outputs, so these Aux
controls will not affect what is heard on the Main outputs or on any other
Aux buses. This Aux Send bus should be pre-fader, so you can use the
fader controls to set the levels of each channel to the main output.

Auxiliary telephone optional.
Used to dial out to set up calls.