3. Net-Log Set-up & Installation
N
ET
-L
OG
S
ET
-
UP
&
I
NSTALLATION
3
Figure 3.1 Network Topology
Adjusting Record Input Levels
The peak audio input levels are preset at +12dBu. This
means that an audio signal of +12dBu, once encoded, will
be at the maximum digital value. To change the peak
audio input level, follow the procedure below.
1. Switch the unit on and while the alarm LED’s on the
front panel are flashing, press the record control
button. The record button will illuminate.
2. Connect a constant audio signal at the required peak
level to Input 1.
3. Adjust the Input 1 level control on the rear panel until
the input level LED 1 on the front panel is green.
4. Repeat steps 2 & 3 for all 4 inputs. When you have
finished, simply press the record control button and
the Net-Log will complete its initialisation procedure.
Network Topology
The network that the Net-Log is connected to must be a
dedicated network, if you are to guarantee the audio being
available for play streaming. The ideal configuration is
shown in
Figure 3.1
, with the Net-Log(s) connected
directly to a network switch, which is connected directly to
dedicated network interface cards in the PC’s. It is under
these conditions that the test results have been achieved
in
Figure 3.2
.
Maximum Network Connections
The maximum number of people that can connect to the
Net-Log and use Play Streaming simultaneously is
dependent on the number of software licenses that have
been bought and also the data rate of the recordings that
you are making. The software license is available as either
a 2-stream license, or a 5-stream license. Due to the low
fixed bit rate of the G.729A record format, the type of
license (2 or 5 streams) is the only limiting factor for the
number of simultaneous Play Streams when G.729A is
selected.
Figure 3.2
shows the maximum number of streams, for
the MPEG record format, for the given recording bit rate
configured. These figures assume that there is no other
activity on the network, including Archiving of Net-Log
audio.
The figures show that for 5 people to be able to
simultaneously Play Stream one stereo channel of MPEG
audio, the recording bit-rate must be set to 160kbps or
less.
If you have two pairs of stereo channels on a Net-Log set
at different bit-rates, the total number of people that can
Play stream them is governed by the combined bit rates of
the play streaming. The limit of the maximum total stream
rate is around 900kbps.
Sonifex Net-Log User Handbook
13
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...