Audio Authority 1311 User guide

Audio Authority 1311 User guide
Innkeeper 1rx is covered by a 2-year warranty to be free from
defective workmanship and materials. In the event that the
Innkeeper 1rx 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
innkeeper 1rx
Digital Hybrid
User Guide
JK Audio, Inc. 1311 E 6th Street, Sandwich, IL 60548 USA
Voice: (815) 786-2929 Toll Free: 800-JK-Audio Fax: 815-786-8502
[email protected]
Copyright © 2006 JK Audio. All Rights Reserved.
JK Audio
FCC Registration (continued)
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.
1. Connection and use with the nationwide telephone network
The FCC requires that you connect this telephone equipment to the
national telephone network through a USOC RJ-11C modular
telephone jack.
This equipment may not be used with Party Line Service or Coin
Telephone Lines
This equipment is hearing aid compatible.
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 1rx controls and connectors are clearly marked and
ready for operation. 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.
Features—Front View
14 15
2. Information for the telephone company
Upon request from your local telephone company, you are required to
provide the following information:
a) The "line" to which you will connect the telephone equipment (that
is, your telephone number), and
b) The telephone equipment's FCC registration number. This can be
found on the bottom of your telephone equipment, and,
c) the ringer equivalence number (REN) for this equipment.
The REN is used to determine the quantity of devices which will be
connected to the telephone line. Excessive RENs on the telephone
line may result in the devices not ringing in response to an incoming
call. In most, but not all areas, the sum of the RENs should not
exceed 5.0. To be certain of the number of devices that may be
connected to the line, as determined by the total RENs, contact the
local telephone company.
3. Repair Instructions
If it is determined that your telephone equipment is malfunctioning,
the FCC requires that it not be used and that it be unplugged from the
modular outlet until the problem has been corrected. Repairs to this
telephone equipment can only be made by the manufacturer or its
authorized agents or by others who may be authorized by the FCC.
For repair procedures, follow the instructions outlined under the
warranty section of the manual.
4. Rights of the telephone company
If telephone equipment is causing harm to the network, the telephone
company may temporarily discontinue your telephone service. If
possible, they'll notify you before they interrupt service. If advanced
notice isn't practical, you'll be notified as soon as possible. You'll be
given the opportunity to correct the problem, and you'll be informed of
your right to file a complaint with the FCC.
Your telephone company may make changes in its facilities,
equipment, operations or procedures that could affect the proper
functioning of your JK Audio product. If such changes are planned,
you'll be notified by your telephone company.
Mix Out:
Phone Line Connector:
Frequency Response:
Features—Front View
Balanced Female XLR, 1k ohms, -10 mV RMS
(-35 dBm nom.)
Mic / Line pad switch, Line = +5 dBm nominal
Balanced Male XLR, 200 ohms, 500 mV RMS
(+12 dBm Max.)
Balanced Male XLR, 200 ohms, 500 mV RMS
(+12 dBm Max.)
1/4" Stereo, 8 ohms, 250 mW per channel
Screw Terminals, 8 ohms, 1 watt
1500 VAC
0.5B REN
Telephone side 200 Hz - 3600 Hz
Universal AC supply, 120-240 VAC, 50-60 Hz
25 watts max.
1.75" x 7.3" x 10.5" (4.5 x 18.6 x 26.7 cm)
5.7 Pounds
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. 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 own expense.
Call Button - Press this button to answer or place a telephone call
(takes the line off-hook).
Drop Button - Press this button to drop (hang up) a call.
Send Level - Adjusts the signal that you are sending down the
telephone line.
Caller Level - Adjusts the level of the signal coming in from the
telephone line, going out the “Caller” jack.
Send > Mix Level - Adjust the level of your audio that will be sent to
the “Mix Out” jack.
Caller > Mix Level - Adjusts the level of caller audio that will be
sent to the “Mix Out” jack.
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.
Mix Monitor - Adjusts the mix signal level sent to the headphone
and rear panel speaker terminals.
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 to automatically
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.
Changes or modifications not expressly approved by JK Audio can void
the user's authority to operate the equipment.
14 Presence - press this switch to boost the low end of the caller audio
signal. Presence is added to the caller audio signal only.
FCC Registration
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.
Your new JK Audio product has been registered with the Federal
Communications Commission (FCC). This product complies with the
standards in Part 68 of the FCC rules.
16 Auto-Answer - Press this switch to enable the innkeeper to automatically answer an incoming call and then disconnect after the
caller hangs up. Auto answer will occur on the first ring.
Features—Rear View
Operation (continued)
22 23
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
caller> mix 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 - 8 pin modular jack for connection to
the 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.
Remote Control Jack
The RJ-45 type 8 pin jack on the back of the innkeeper is for
connection to a JK Audio Guest Module 1 Remote Keypad. The
Guest Module 1 features:
Ring and Call LEDs
Call and Drop buttons
DTMF Keypad
Keypad disable switch
Also, when you dial using the Guest Module keypad, the tones are
sent directly down the phone line, and do not come back blasting in
your ear.
Contact your JK Audio dealer for additional information.
? Does the innkeeper 1rx send a burst or beep down the phone
line at the beginning of the call like our current hybrid?
No. Innkeeper 1rx uses the actual transmit signal to evaluate
the phone line and tune its algorithm. As you begin to speak,
innkeeper 1rx is hard at work canceling your voice from the
Caller Output jack. Within milliseconds your voice is reduced
into the noise floor.
Will your innkeeper 1rx provide phantom power for my condenser microphone?
No, our devices will not provide phantom power. If you plan to
connect your microphone directly to an innkeeper 1rx, you
should use a dynamic mic.
24 Mic / Line switch - Sets the front end sensitivity of the Send
XLR jack. Set to Mic if you intend to plug a microphone directly
to the Send jack. Set to Line if you are connecting to a mic
25 Remote Terminals - Screw terminals provide connections for
a small loudspeaker, remote LEDs, tape recorder control, or
console call control switches.
Ring LED Supplies +4.3 VDC, 40 mA pulse signal during
incoming ring cycles.
Chassis Ground
OH LED Supplies +4.3 VDC, 40 mA steady signal during an
active call.
Call (NO) Pull this pin to ground momentarily to simulate
pressing the Call button.
Drop (NO) Pull this pin to ground momentarily to simulate
pressing the Drop button.
Operation (continued)
Connection—Mix-Minus Setup
The Auto-Answer feature will answer on the first ring. When AutoAnswer is enabled, you can still take calls manually using the call
button. When finished, you can either drop the call manually or allow
the call to Auto-Disconnect. Innkeeper 1rx will look for a CPC
(calling-party-control) disconnect signal or ROH (receiver-off-hook)
message from the phone company to determine when a call has
disconnected. This can take up to a minute.
1 kHz Tone Generator
The 1 kHz tone generator is used for setting levels. When pressed
once a full scale 0dB maximum output level signal is sent down the
phone line. This will allow you to calibrate levels at the other end of
the call. When pressed again, this same signal is sent to the caller
output only. This will allow you to calibrate the signal level at your
console. The tone generator is disabled when pressed a third time.
Auxiliary telephone optional.
Used to dial out to set up calls.
Caller to any
line level input
Aux Send to Send 1,
Mic/Line button out (Line)
Number of mics
depends on mixer
Dry Lines
Innkeeper 1rx was designed to work on standard (wet) telephone
lines as well as on custom pbx (dry) lines. Dry line installation is
always a custom configuration and requires substantial telephone
system knowledge. These installations are found in radio and
television studios for both PBX and intercom applications.
Wet lines are typical tip / ring telephone lines that carry ring voltage,
talk battery, and full duplex, balanced audio over two wires to an
analog telephone. Dry lines carry the balanced, full duplex audio but
without the ring voltage or talk battery. innkeeper does allow dry line
operation with a few limitations:
• If talk battery is not present when the Call button is pressed, a
dry line is assumed.
• If talk battery suddenly appears during a “Dry Line” call, it
becomes a wet line call, and auto-disconnect will occur when a
disconnect signal occurs, or if talk battery disappears.
• Auto-answer does not work on a dry line.
• The aux telephone jack will not support an analog telephone
during a “Dry Line” call.
Rear Screw Terminals
1 Speaker (+) Minimum 8 ohms, 1 watt max
2 Speaker (-) Use together with terminal 1
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.
Operation (continued)
Connecting Cables
Although each application will require a slightly different setup, there
are four cables that everyone can agree upon:
1 Phone Line - Connect the supplied RJ-11 phone line cable
between the jack marked “Line” and your wall jack. Be sure this
jack can support standard analog telephone operation.
2 Send Audio - Connect a microphone or mixing console output XLR
cable to the Send jack on the innkeeper. Be sure to set the
innkeeper mic/line switch to the proper position for your application
3 Caller Audio - Connect the Caller Out jack to an input on your
mixing console.
4 Power - Connect the supplied AC power cord to the back of the
innkeeper and then to an AC power outlet.
Your innkeeper 1rx is now ready to take calls. You may want to
connect an auxiliary telephone to the innkeeper for call setup, or you
can simply use Auto-Answer or the Call button to answer an incoming
Jumpers 2 and 3 control whether or not phone line jack and phone
switched or bridged. In the factory default closed position, jacks are
bridged together. In the optional open position the jacks are switched.
This means that when the “call” button is pressed any phones connected to the phone jack of the innkeeper are disabled. When the
“drop” button is pressed phones become active again.
Auxiliary Telephone
Innkeeper 1rx does not disconnect the auxiliary telephone when you
press the call button. In fact, the DSP continuously monitors the
telephone line to achieve maximum separation between transmit and
receive signals. You can use an auxiliary telephone to place or screen
a call, and then you can place the call on hold. When you are ready to
take the call on innkeeper 1rx, simply press the call button. Your
telephone will automatically release the hold while you talk. If you
need to take the call back on the aux telephone, simply pick up the
phone before the innkeeper drop button is pressed. If you would
prefer the old world way of disconnecting the aux jack when the hybrid
takes the call, please refer to the optional jumper settings section.
Optional Jumper Settings
On the circuit board, jumper 1 controls incoming caller level. In factory
default closed position caller input is normal level. In optional open
position, incoming caller level is –6dB. This does not affect transmit
level. This option is not necessary except in some conditions where
phone line is unusually “hot”. Only set this option if incoming caller
level is too loud.
Send Signal Level
The Send LEDs display the signal level as it goes out to the phone
line. The goal is to drive the phone line at high enough levels to avoid
phone line noise, but not so loud as to cause excessive clipping.
Adjust the send level control until you see occasional flashes of the
red -3dB peak Send LED. These flashes should occur 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 back down on the Send volume control.
Receive Signal Level
The receive LEDs display the signal coming from the phone line and
out of the DSP. The Caller level control does not change what you
see on these LEDs. Adjust the Caller level control to give you the best
signal at your equipment.
When the Automatic Gain Control is used, innkeeper 1x automatically
adjusts the caller level to maintain acceptable levels between calls. In
this way an unusually loud caller will be similar in level to the unusually soft caller.
Caller Ducking
The Caller Ducking option lowers the level of the caller’s audio by 9dB
when local audio is present. This is a good way to regulate the obnoxious callers when the talent is speaking.
The Presence feature is a custom digital filter that boosts low
frequencies in the 120Hz to 500Hz region to compensate for losses in
the telephone network. This is a single ended algorithm that treats
only the caller signal before it leaves the digital hybrid. You may
notice that is has more of an effect on low pitched, or deeper voices.
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