1. Introduction
I
NTRODUCTION
1
Figure 1.1 System Block Diagram
Figure 1.2 Single Net-Log Connection example
General Overview
The principal behind the Net-Log logger is that generally
speaking, computers should not be used for recording
audio where their general unreliability can cause system
crashes or lockups, with little regard for the security of the
audio being recorded. However, for playback, using
computers is perfectly acceptable and probably preferable,
due to the ability to manipulate and edit the audio,
provided it is in a suitable format.
The Net-Log
The Net-Log is a 1U rack-mount, hardware audio recorder,
designed primarily for audio logging in a broadcast
environment. It is able to record up to 4 mono, or 2 stereo
audio feeds, which are saved onto a large internal IDE
hard disk. The hard disk is continuously over-written,
allowing access to all the audio recorded on it. Apart from
the front panel mounted record override button, all
functions and configurations are controlled via the
Ethernet TCP/IP network connection using the supplied
Windows control software package.
Net-Logs can be used singularly (
Figure 1.2
), or if more
record channels are required, multiple Net-Logs can easily
be configured to operate on the same Network (
Figure
1.3
).
Net-Log Control Software
Net-Log works in conjunction with a software control
package that runs under Windows. This package consists
of Net-Log-Win, Net-Util and Net-Log Auto-Archive. Net-
Log-Win is the main control and configuration program.
Net-Util is a configuration and monitoring utility that
communicates with Net-Log via a serial connection. Net-
Log Auto-Archive is a program designed to Archive audio
data from multiple Net-Logs simultaneously.
Recording
Audio presented to the inputs is encoded in one of two
user selectable formats, MPEG layer 2 or G.729A (An
additional license is required to enable the G.729A format
– contact Sonifex Ltd for details). The compressed data is
then written to the internal IDE hard disk drive. Recording
can be either continuous or programmed to start and stop
at selected times. Record set-up allows for mono/dual
mono/stereo and sample-frequency/bit-rate selection,
depending on record format selected.
When recording has started, these parameters can only be
altered once the audio on the disk has been deleted. The
hard disk audio cannot be deleted whilst the logger is
recording.
Sonifex Net-Log User Handbook
7
Summary of Contents for Net-Log
Page 1: ...Sonifex Net Log User Handbook...
Page 6: ...Contents Sonifex Net Log User Handbook...
Page 10: ...License Form Sonifex Net Log User Handbook 4...
Page 16: ...1 Introduction Sonifex Net Log User Handbook 10...
Page 24: ...3 Net Log Set up Installation Sonifex Net Log User Handbook 18...
Page 32: ...5 Recording Sonifex Net Log User Handbook 26...
Page 36: ...6 Playing Downloading Sonifex Net Log Win User Handbook 18...
Page 48: ...9 Serial Control Interface Sonifex Net Log Win User Handbook 30...
Page 56: ...11 The Administrator Sonifex Net Log Win User Handbook 38...
Page 62: ...13 Technical Specification Sonifex Net Log Win User Handbook 44...
Page 64: ...14 Glossary Sonifex Net Log Win User Handbook 46...