JK Audio Broadcast Host Bedienungsanleitung
ANALOG DESKTOP DIGITAL HYBRID
JK Audio
Broadcast Host™
User Guide
ii Broadcast Host™ Analog Desktop Digital Hybrid
Thank You
Thank you for purchasing a JK Audio Broadcast Host Analog Desktop Digital
Hybrid. Please read this guide for instructions on setting up and using your
new product.
Getting Assistance
If you have technical or application questions:
In the US & Canada, call us toll free at: 800-552-8346
All other countries dial: 815-786-2929 (M-F 8:30-5:00pm Central Time Zone)
Or, check out our FAQ section for answers to common questions.
Limited Warranty
The Broadcast Host is covered by a 2 year warranty to be free from defective
workmanship 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 modications, or damages occurred
in shipping, only defective workmanship or materials.
THERE ARE NO EXPRESSED OR IMPLIED WARRANTIES WHICH EXTEND BEYOND THE
WARRANTY HERE MADE.
Welcome
Contents
Overview 1
Getting to know your Broadcast Host™
2 Controls & Indicators
4 Inputs & Outputs
2
Getting Connected 6
Operation 8
Conguration 9
FAQs 10
Technical Information 12
Contents iii
Contents
iv Broadcast Host™ Analog Desktop Digital Hybrid
16 bit DSP Technology
Auto-Answer (Switchable On/Off)
Proprietary Auto Null Algorithm
(50 dB null)
Send XLR Line Input
Mic/Line Switch
3.5mm Mono Line Input
Caller XLR Line Output
3.5mm Stereo Line Output
3.5 mm Stereo Headphone Jack
Send and Caller Signal Level LEDs
Send and Caller Volume Controls
Guest Module Remote Jack
Universal Power supply with
detachable cord
60” RJ11 Phone Cord
Features
In the Box
Features
Overview 1
Introducing the Broadcast Host™
Broadcast Host 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 limited audio path.
What is a Digital Hybrid?
The Broadcast Host digital hybrid connects audio signals to a standard analog
telephone line without the variations 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 in order to properly separate transmit and
receive audio. We use a 16 bit DSP (Digital Signal Processor) to continuously
monitor the phone line and local audio signals to deliver excellent trans-hybrid
loss, also known as separation. Our dual-convergence algorithm can achieve
excellent separation, typically exceeding 50 dB.
Ready to go?
The Broadcast Host controls and connectors are clearly marked and ready for
operation. The Features diagrams and Operation sections on the following pages
will help you pinpoint any minor questions that you may have. 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.
Any Questions?
Before you pick up the phone... Please thumb through the rest of this manual.
You might nd those deep technical questions are covered on later pages.
Overview
2Broadcast Host™ Analog Desktop Digital Hybrid
Getting to Know Your Broadcast Host
3 4 5 6 71
8 9
2
10 11
1. Call Button
Press this button to answer an incoming call or to connect your call through
the hybrid if you have used an auxiliary phone to set up the 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 down the telephone line,
through the female XLR input.
4. Send 2 Level
Adjusts the signal level that you are sending down the telephone line,
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
Getting to Know Your Broadcast Host™ 3
Getting to Know Your Broadcast Host
Indicators Cont’d
8. OH LED
Lit when you are on line with a call (Off-Hook).
9. Send LEDs
Displays the signal level going to the phone line. The goal is to drive the
phone line audio at levels high enough to avoid phone line noise, but
not so loud as to cause excessive clipping. Adjust the Send level control
so that you rarely see ashes of the red -3dB 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.
10. Power LEDs
Lit when unit is plugged in and receiving power.
11. Caller LEDs
Displays the signal level coming in from the phone line, after the DSP.
This signal level will not change when you adjust the Caller knob. 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 Caller channel of the stereo output mini jack.
4Broadcast Host™ Broadcast Field Mixer
Getting to Know Your Broadcast Host
Inputs & Outputs
1. Line Jack
Connect to a standard, single line, analog telephone line.
2. Phone Jack
Connect a single line analog telephone for call setup, dialing, or call
screening. (Optional).
3. Auto-Answer
This switch enables Broadcast Host to automatically answer an incoming
call and then disconnect after the caller hangs up. Auto answer will occur on
the rst ring.
4. Caller Output
Male balanced XLR output contains only the caller’s voice.
5. Send 1 Input
Female balanced XLR input for signals going out to the phone line. Mic or
line level input.
6. Mic / Line switch
7. 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.
3 4 5 6 1097 81 2
Inputs & Outputs Cont’d
7. Send 2 Mono Input
3.5mm mono mini jack input for signals going into the phone line.
Line level.
8. Stereo Output
3.5 mm stereo mini jack output 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 telephone line.
9. 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.
10. Power Jack
For connection only to the supplied 9VDC regulated power supply.
Getting To Know Your Broadcast Host™ 5
Getting to Know Your Broadcast Host
6Broadcast Host™ Broadcast Field Mixer
Setting Up
1. Connect the supplied RJ-11 phone line cable between the jack marked Line
and your wall jack. Be sure this jack supports standard single line analog
telephone operation.
2. There are 2 ways to set up the audio equipment for your Broadcast Host:
A. One Mic/Headphone (No Mixer): See Figure 6a.
1. Connect a dynamic microphone cable to the Send 1 jack on the
Broadcast Host. Be sure to set the Broadcast Host Mic/Line
switch to the Mic position.
2. Connect a stereo cable from the mini-jack Stereo Out on the
Broadcast Host to the Line In on your computer sound card or
other recording equipment that has a stereo input.
B. Two or more Inputs/Outputs (Mix-Minus Caller): See Figure 7a.
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 Broadcast Host will cause an
echo, or feedback.
1. Connect Caller to any Line Level input on mixer.
2. Connect Aux (or FX) Send on mixer to Send 1 on Broadcast Host.
Set the Broadcast Host Mic/Line switch to the Line position.
3. Connect the supplied DC power supply to the back of the Broadcast Host
and then to an AC power outlet.
Your Broadcast Host is now ready to take calls. You may want to connect an
auxiliary telephone to the Broadcast Host Phone jack so you can dial out and set
up calls, or use the Auto-Answer feature to answer incoming calls.
Place a test call to a quiet location. Set the Send level control so that while you
are speaking into the microphone, the Send LEDs on the hybrid light the -20 dB
green LED consistently and ash the -9 dB green LED. If you ash the -3 dB red
LED, lower the level. Set the Caller control for good recording level of the caller
audio at the output jack.
Getting Connected
GUEST MODULE 1
Figure 6a
Andere Handbücher für Broadcast Host
2
Inhaltsverzeichnis
Andere JK Audio Empfänger Handbücher
