Linear Acoustic LAMBDA-II Audio Monitor User Guide
13
Chapter 3: Application Notes
The Linear Acoustic L.A.M.B.D.A. monitor can be thought of as a multi-format audio and
metadata router followed by optional decoding, with outputs in the form of powered
speakers, headphones, and baseband PCM. Metadata must be carefully checked prior to
the final encoding process and this monitor also provides this necessary functionality.
In its simplest form, LAMBDA can be used to monitor baseband or embedded PCM audio
signals grouped into pairs, and metadata can be selectively applied. For example, if 8 sep-
arate stereo programs are applied to the unit, each pair can be assigned to its own program
(1-8), then easily cycled between using the Menu navigation cluster.
More complex configurations are also easily supported. Program one and program four are
special in that they are able to support mono, stereo, or 5.1 channel programs. All other
programs can support mono or stereo programs.
3.1
Inputs and Reference
Audio can be applied as baseband or compressed via AES or HD-SDI. Metadata is via RS-
485 to accompany AES signals, extracted from the vertical ancillary (VANC) space of an
applied SDI signal, or provided by the optional Dolby E/Dolby Digital (AC-3) decoding
module.
Reference for the LAMBDA is automatically changed when the input source is selected.
For AES sources supplied via the discrete BNC connectors, the clock reference is derived
from Input 1/2. For SDI sources, the reference is of course the SDI input. If no reference
is connected, the unit will revert to an internal 48kHz oscillator.
3.2
Monitoring PCM Sources
The first step is to set the Source Mode to the desired PCM input format. If the input signal
is baseband PCM over AES, the choices are PCM Via BNC or PCM Via BNC+MD for
monitoring audio and RS-485 metadata.
The menu screen below shows how PCM inputs can be assigned to programs. Note the
presence of audio on BNC 1 (assigned to Lf/Rf) and the absence of signal on other chan-
nels as indicated by “XX”:
Summary of Contents for L.A.M.B.D.A.-II
Page 1: ...L A M B D A II Digital Audio and Metadata Monitor User Guide...
Page 2: ......
Page 8: ...Linear Acoustic LAMBDA II Audio Monitor User Guide viii...
Page 12: ...Linear Acoustic LAMBDA II Audio Monitor User Guide Introduction 8...
Page 16: ...Linear Acoustic LAMBDA II Audio Monitor User Guide Connections and Quick Setup 12...
Page 20: ...Linear Acoustic LAMBDA II Audio Monitor User Guide Application Notes 16...