38
MAX
LOW
MAX
LOW
INPUT
SECTION
OUTPUT
SECTION
PFL
AFL
PFL
AFL
METER
V.+
POWER SUPPLY
STATUS
V.-
5 V
12 V 48 V
DIMMER
METERING
LAMP
OUTPUT SECTION PFL/AFL
This switch determines the Meter’s source
signal for the
MAIN/LEFT/RIGHT
and
SUB
Meters. With the switch up, in
PFL
mode (Pre-
Fader Listen), signals are sent to the Meters
pre-Fader, pre-
MUTE
, and pre-
PAN
. In fact, in
PFL
mode, these Meters may save you the time
of having use
SOLO
, if all you need is a signal
confirmation. With the switch down, in
AFL
mode, signals are sent to the Meters post-
Fader, representing the output of the circuit.
DIMMER
LAMP
This control adjusts the brightness of the
4-pin XLR Littlite
®
lamps, which are available
at a music store near you.
Littlite
Part Number
Description
12X-HI-4
12" Hi-intensity lamp
with 4-pin XLR
18X-HI-4
18" Hi-intensity lamp
with 4-pin XLR
METER
This control adjusts the brightness of the
LED Meters.
Note:
When the
METER DIMMER
is turned
all the way down to
LOW
, the amber LEDs (+4
to +10) may appear to be off. This is normal,
and due to the varying current requirements of
the different colored LEDs to produce equal
brightness. Adjust the control to suit your taste.
POWER SUPPLY STATUS
These five LEDs let you know that each of the
SR40•8’s essential power supply voltages are
present.
V.+
and
V.–
are the positive and nega-
tive power rails that power the audio circuitry.
5 V
is a 5-volt DC supply that powers the logic,
like the
ULTRA MUTE
™
computer and
SOLO
relays.
12 V
powers the 4-pin XLR lamp sockets.
48 V
is the
PHANTOM
power supply.
On the off chance that one of these status
LEDs doesn't glow, indicating a problem, be
sure to power down as continued use could
cause further damage.
TALKBACK SECTION
The SR40•8’s extensive
TALKBACK
section
allows the engineer to speak into several out-
puts via a master
TALKBACK
switch, with
separate assignment switches for
AUX 1–4
,
AUX 5–8
,
L/R
mix, an
EXTERNAL
talkback out-
put, and one switch for each
MATRIX
(
A–D
).
Talkback microphones are patched into either
of the two phantom-powered XLR inputs and
regulated by a
LEVEL
control. Additionally, the
talkback signal may be replaced by a
400Hz
sine
wave for checking levels, or
PINK NOISE
for
quickly checking frequency response.
TALKBACK
Point Before:
OSCILLATOR
switch.
Point After:
ASSIGN
switches.
This switch is enormous, glows in the dark,
and is located right in your face, by the
LEFT/
RIGHT
Faders. To speak to the crew and/or tal-
ent, simply engage the switch and your voice
will be sent to all the destinations you’ve
assigned.
If you're using the intercom system, this
switch stops glowing and the intercom switch
glows to indicate that someone is calling you.
TALKBACK LEVEL
Point Before:
TALKBACK MIC
inputs’ preamp
Point After:
OSCILLATOR
.
This controls the signal level from the
TALKBACK MIC
inputs. The signal is off when
turned fully counterclockwise, with more than
enough gain turned fully clockwise. Set it so
everyone can hear you comfortably, probably
near the center detent.
O
O
MAX
O
O
MAX
O
O
MAX
ASSIGN
TALKBACK MIC
TALKBACK
AUX 1-4
MATRIX A
AUX 5-8
MATRIX B
EXTERNAL
MATRIX C
L/R
MATRIX D
INTERCOM
PHONES
SOLO LEVEL
LEVEL
TALKBACK LEVEL
ON
IGNORE
CALL
COMMUNICATIONS
OSCILLATOR
RECEIVE
400Hz
PINK NOISE
TALKBACK
CO
C
O S
O
O
MAX
O
O
MAX
