Lexicon SDP-40 - Manual (Page 50)

DIGITAL BYPASS (ON, OFF)
DIGITAL BYPASS allows direct digital recording. When set to ON,
the unit passes the digital input signal - unaltered - to the S/PDIF
outputs. When set to OFF, the unit sends digital audio output
through a sample rate converter before passing it to the S/PDIF
outputs. This allows the digital output signal to match the input of
a digital recording device.
Note:
Changing the setting of the DIG OUT RATE
parameter will cause the RECORD AUDIO OUTPUT
labelled S/PDIF to mute momentarily. Otherwise, DIG
OUT RATE parameter settings will be ineffective when
the DIGITAL BYPASS parameter is set to ON.
DIG OUT RATE (44.1kHz, 48kHz, 88.2kHz, 96kHz, INPUT)
DIG OUT RATE sets the S/PDIF output sampling rate for analog or
digital inputs. When set to INPUT, the unit varies the S/PDIF audio
output rate to match the sampling rate of the input signal. When
set to a numerical value, the output sampling rate remains at the
selected value. This is useful for recording devices that operate on
a single sampling rate, such as CD-R (44.1kHz).
RECORD (ENABLED, BLOCKED)
RECORD prevents feedback loops with recording devices. When set
to ENABLED, the unit allows record signals from the selected input
to pass to the RECORD AUDIO and VIDEO OUTPUTS. When set to
BLOCKED, the RECORD AUDIO OUTPUTS are blocked, preventing
feedback loops. However, the unit will still pass video signals to the
RECORD VIDEO OUTPUTS.
3-17
The SETUP Menu
SDP-40
• The AUTO setting allows the unit to switch between the
selected DIGITAL IN and ANALOG IN connectors. The
DIGITAL IN connector is utilized when a valid digital audio
input type is present. When invalid digital audio input
types are received, the unit automatically switches to the
ANALOG IN connector. INPUT SELECT will automatically
be set to AUTO when a connect or selected for both the
DIGITAL IN and ANALOG IN parameters. This setting is
recommended for input sources that utilize both digital
and analog audio input types, such as a laser disc player.
Note:
Some sources supply valid digital audio input types
that remain active even when no audio is present in
the signal. Because the unit recognizes these as valid
digital audio input types, it will not switch to the
ANALOG IN connector. For these sources, it is
recommended to configure two different inputs - one
for digital audio input types, and a second for analog
audio input types.
ANLG IN LVL (-18 to +12dB)
ANLG IN LVL allows manual adjustment of the analog input level of
the RECORD AUDIO OUTPUT labelled S/PDIF. It is used to prevent
the internal analog-to-digital converter from overloading. It can be
adjusted while listening to an input source.
When ANLG IN LVL is selected, a white horizontal bar graph will
appear on the screen below the ANLG IN LVL parameter. This
graph illustrates the position at which the current setting falls
within the -18 to +12dB parameter range. Press the up and down
MENU arrows to increase and decrease the setting in 1dB
increments. Press the left MENU arrow to close the graph and
return to the RECORD ADV menu.