JK Audio BROADCAST HOST Ibrido Telefonico Digitale da Tavolo User manual
Broadcast Host
Desktop Digital Hybrid
User Guide
JK Audio
Introduction
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?
A 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 callers 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
to continuously monitor the phone line and audio signals to deliver excellent separation. Our dual-convergence algorithm can
achieve excellent trans-hybrid loss, typically exceeding 50 dB,
without any setup.
Ready to go?
The Broadcast Host controls and connectors are clearly
marked and ready for operation. The feature diagram 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.
2
Features
1 2 3 4 5 6 7
8 9
10 11
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 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 signal coming in from the
telephone line, 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.
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.
10. Power LED - Lit when unit is plugged in and receiving power.
11. Receive LEDs - Displays the signal level coming from the phone
line, after the DSP.
3
Features (continued)
12 13 14 15 16 17 18 19 20 21
12. Line Jack - Connect to a standard, single line, analog telephone line.
13. Phone Jack - Connect a single line analog telephone for call setup /
dialing, or producer call screening.
14. Auto-Answer - Press this switch to enable the Broadcast Host to automatically answer an incoming call and then disconnect after the caller
hangs up. Auto answer will occur on the first ring.
15. Caller Output - Male balanced XLR output contains only the caller’s
voice.
16. Send 1 Input - Female balanced XLR input for signals going into the
phone line. Mic or line level input.
17. Mic / Line switch - Sets the front end sensitivity of the Send 1 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 the output of a mic mixer.
18. Send 2 Mono Input - 3.5mm mono mini jack input for signals going into
the phone line. Line level.
19. Stereo Output - 3.5 mm stereo mini jack output contains Send and
Caller audio determined by the Send 1 and Send 2 levels and the
caller level controls. Left channel contains your local Send audio and
right channel contains the Caller's audio from the telephone line.
20. Remote Control Jack - 8 pin modular jack for connection to the JK Au-
dio Guest Module 1 Remote Keypad or your broadcast console switch
contacts.
21 Power Jack - For connection to supplied 9VDC regulated power supply
only.
4
Loading...