1-3
Installing the 300L
OUT
MIDI
THRU IN
DO DI
DI
DO
EIAJ CP340
COMM PORT
AES/EBU
DOTIME CODE IN
PUSH
DI
PUSH
R OUT R IN
PUSH
L OUT L IN
PUSH
INPUT
GAIN
MIDI Connectors
AC Power
Standard 3-pin IEC
power connector.
Communications
Port
DE9 LARC connec-
tor.
Input Gain
2-position (In/Out)
switch for matching in-
put gain to the source
being used.
In = +16dB; Out = 0dB.
Out: Transmits MIDI data to other equipment.
Thru
: Passes any MIDI data received without
change.
In
: Receives MIDI information from other MIDI
equipment such as master keyboard controllers,
MIDI foot controllers, sequencers and synthesiz-
ers.
The Rear Panel
Analog Inputs and Outputs
Digital Inputs and Outputs
Inputs
Three connectors are provided for digital input:
AES/EBU professional format (1):
3-pin female XLR
S/PDIF EIAJ CP-340 consumer format (2):
unbalanced coaxial RCA
optical (fiber-optic)
One of these connectors may be selected for
digital input.
Outputs
Output format can be AES/EBU or S/PDIF.
Output always goes to all three digital outputs.
Digital interfaces conform to AES 3-1992 (ANSI
S4.40-1992). Input/output impedance levels of
the AES/EBU connectors comply with the
CCITT V.11 EIA RS-422A.
Time Code In
3-pin female XLR con-
nector for input of
SMPTE (Drop or Non-
drop), EBU, or FILM
time code formats.
(Electronically bal-
anced, 100mV p-p
minimum)
3-pin XLR connectors, electronically balanced.
Either pin 2 or pin 3 can be used as high but, to
maintain polarity when transferring data to the
digital domain, pin 2 high convention is used by
Lexicon.
Pin 1 and either pin 2 or pin 3 of each output
must
be grounded for unbalanced operation.
Input impedance is 50kΩ unbalanced, and
100kΩ balanced. Inputs accept input levels from
-14dBu to +20dBu.
Output impedance is 75Ω, and levels up to
+18dBu are possible.
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