USER’S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 41
When
the
V.35/X.21
interface
is
present
(and
selected)
the
Sync
LED
will
be
illuminated
only
if
a
valid
external
clock
signal
at
the
correct
frequency
for
the
Bit
Rate
setting
(in
the
CODEC
menu)
is
present
on
one
of
the
two
V.35/X.21
ports.
When
the
Ethernet
interface
is
selected,
the
Sync
LED
will
blink
while
the
Xstream’s
clock
works
to
sync
with
the
Xstream
on
the
other
side
of
the
connection.
Due
to
network
conditions,
it
is
common
for
this
light
to
be
solidly
on,
and
then
start
blinking
again
as
the
clock
readjusts.
Lock
1
&
2
LEDs
The
green
Lock
1
and
Lock
2
LEDs
represent
the
codec
decoder
status.
When
a
dual
channel
receive
mode
is
used
(i.e.
L3
Dual
‐
mono
or
G.722)
the
Lock
1
LED
represents
that
the
decoder
is
locked
(or
“framed”)
to
the
incoming
coded
audio
on
“Line
1”
while
the
Lock
2
LED
represents
a
decoder
lock
on
an
incoming
audio
stream
on
“Line
2”.
In
the
case
of
a
receive
mode
requiring
both
B
channels
(most
stereo
mode
as
well
as
mono
128)
both
lock
LEDs
will
illuminate
only
once
a
compatible
pair
of
bit
‐
streams
are
present
on
both
“Lines”.
Send
Bargraph
The
Send
bargraph
LEDs
represent
the
level
of
audio
into
the
coder
section.
This
level
is
affected
by
several
factors:
The
output
level
of
the
device
connected
to
the
Zephyr
Xstream;
the
setting
of
the
Ch
"x"
Gain
option
in
the
AUDIO
menus;
the
mixer
knob
setting.
As
with
most
digital
equipment,
these
meters
are
calibrated
in
dBfs
(decibels
below
full
scale).
In
other
words,
the
top
LED
represents
the
clip
point
and
the
numbers
are
calibrated
in
dB
below
f
ull
s
cale.
Therefore,
it
is
important
that
your
levels
be
set
to
where
the
top
LED
is
never
lit.
There
is
a
transition
of
LED
color
at
‐
10
dBfs.
Since
the
meters
are
peak
indicating,
it
will
generally
be
safe
to
run
things
into
the
red,
depending
on
the
desired
headroom
and
the
dynamics
of
the
material.
When
setting
levels
with
a
sine
wave
(tone),
a
level
near
the
red
green
boundary
should
be
used.
h
HOT TIP!
The individual level for the audio of each of the 4 mixer inputs (post fader) can be monitored
on the first AUDIO menu. This permits viewing the ratio of the 4 inputs in the mix shown on
the main SEND bargraphs.
Receive
Bargraph
The
Receive
Bargraph
LEDs
represent
the
level
of
the
audio
being
decoded
from
the
far
end.
The
level
is
monitored
in
the
digital
domain
at
the
output
of
the
decoder.
The
calibration
and
characteristics
of
the
Receive
meter
match
those
of
the
Transmit
meter.
Summary of Contents for Zephyr Xstream
Page 2: ......
Page 26: ...USER S MANUAL Section 1 QUICK RESULTS 14...
Page 30: ...USER S MANUAL Section 2 INTRODUCTION Getting to Know the Zephyr Xstream 18...
Page 70: ...USER S MANUAL Section 3 GUIDED TOUR of the HARDWARE 58...
Page 144: ...USER S MANUAL Section 6 AUDIO CODING REFERENCE 132...
Page 164: ...USER S MANUAL Section 8 LIVEWIRETM IP Audio 152...
Page 310: ...USER S MANUAL Appendix 1 Codec Interoperability Information 298...
Page 320: ...USER S MANUAL Appendix 3 ISDN Cause Phrases Values 308...
Page 324: ...USER S MANUAL Appendix 4 Known Working SPID Formats by Telco 312...
Page 356: ...USER S MANUAL Appendix 9 Modular Cable Guide 344...
