Musicam Liberty, Руководство пользователя

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Liberty USERS GUIDE
24
07 Exit Menu
Sub Menus of 08 Test Modes
01 Loop back
mode
Select bit
rate (9,600
– 33,600) Tests all signal processing circuitry within Liberty. (Except
modem). Input signals can be monitored on the “Line Out”
connector and headphones.
02 400Hz Test
Tone
Must be
online Sends a 400Hz tone to the remote Liberty if online and to the unit
output if not online. The tone is 4DBu, which means the
LIBERTY can be used for line up, and testing.
Note: Tones are generated in the DSP module. The Peak Program
meter does not display the level on the originating LIBERTY.
03 Exit Menu
Sub Menus of 09 Memory Setup
The Memory setup is where the stored telephone numbers are accessed from. For full instructions see page
14.
Sub Menus of 10 Unit Details
Provides information on the Liberty:
HOW THE LIBERTY WORKS
Analogue audio inputs (two) are combined and amplitude limited prior to being digitized by a high quality
stereo 20-bit analog-to-digital converter. The serial data bit stream is then fed to an extremely fast 32-bit
DSP that encodes the audio data using the proprietary digital audio compression algorithm. After
compression, the DSP then produces a low bit rate serial data stream that is fed to a V.34 data modem.
At the remote LIBERTY, the reverse process takes place. The audio data is decompressed, fed to a digital-
to-analogue converter, then amplified to line level and fed to a balanced output connector for broadcasting.
Serial#: 1234567P r2
CPU Ver: P1. 11
DSP Ver: 80. 01
[CANCEL]
Serial number of this Liberty
DSP
software
CPU
software