Snell & Wilcox IQBRT8 Manual

IQBRT8
IQBRT8 Digital Audio Router
Module Description
The IQBRT is a range of professional quality
Synchronous Digital Audio Routers, and are
capable of routing up to 8x8 AES/EBU pairs. The
IQBRT can accept PCM digital audio at sampling
rates of 16 kHz to 96 kHz and will automatically
detect the recognised standards of 32, 44.1 and 48
kHz. The IQBRT accepts both AES/EBU and
SPDIF (-B versions only) inputs, and outputs
professional AES/EBU digital audio. The Router
also has an AES/EBU monitoring output for
previewing input material. The IQBRT sample rate
converts all PCM audio inputs to 48 kHz with no
loss of audio quality. The outputs are then
synchronised to either 525 or 625 line video, or a
48 kHz AES Reference, and are frame aligned in
accordance to the AES11 specification. In the
absence of a reference the inputs can be re-
sampled to an internal 48 kHz reference of 10ppm
or Input 1. The IQBRT also accepts 48 kHz non-
PCM audio bitstreams but must be synchronous to
the IQBRT synchronising source.
REAR PANEL VIEWS
IQBRT8-3-B
IQBRT8OPS 020403
AES AUDIO OUTPUTS
2
1
5
4
8
7
IQBRT8 8x8 Digital Audio Router Unbalanced I/O
Version 1 Issue 7
All switching of PCM audio is done via v-fading, to
give seamless glitch-free routing. Non-PCM audio
bitstreams are switched (with no data processing)
on data packet boundaries.
The IQBRT Programme level on any of the inputs
(AES pair) can be adjusted from + 6dB to – 18dB
in 0.1dB steps, each input can also be polarity
inverted or muted. A built-in test tone generator is
also included and can be assigned to any number
of outputs for ease of system set-up.
The IQBRT's digital audio interface is available in
either transformer coupled balanced (-D) or
unbalanced (-B) type.
Full remote control via RollCallTM is included as
standard, which will enables complete control over
the IQBRT.
AES/SPDIF INPUTS
1
3 2
2
4
6 5
2
7
REF
MON
SECTION 41b
C
3
6
8
41b.1