Lavry AD11 Manual - page 9
AD11
Quickstart Guide
5
-
External Word Clock
. This setting enables synchronization to an external Word Clock
signal at the Sample Frequency set in the SF section (above). The LED
in the “
left
channel”
row
” above
wc
indicates “Lock” to an external Word Clock signal. Please see Diagram 2 on
page 10 for more details- the
wc
Lock indicator is labeled “a” in Diagram 2.
- If the external
wc
function is “On” as indicated by the LED, the AD11 will lock to TTL level
sample-
period Word Clock signals applied to the “
clock in
” BNC connector on the rear
panel. The Sample Frequency (SF) of the Word Clock signal
must match the AD11’s SF
.
- If the
wc
setting
is “off,” the AD11 will not lock to external Word Clock inputs.
Like other functions in the Setting mode, if the cursor is positioned at the
wc
LED, it will
flash
rapidly to indicate that the function is “on.” Clicking the set switch once will disable
external WC functions and this will be indicated by a slowly flashing LED. When the cursor is
at another position, the LED is
“off” (not illuminated) when the WC function is “off,” and the
LED is “on” when the function is “on.”
- The
wc
and
dig-a
functions are interlocked so that only one can be enabled at any time.
However; t
hey both can be “Off.”
-
External AES/SPDIF Sync
- Th
e setting designated “
dig-a
” (digital audio) enables
synchronization to an external AES or SPDIF signal at the Sample Frequency set in the
AD11’s SF section (above). The LED in the
left
row above
dig-a
indic
ates “Lock” to the
external AES or SPDIF signal.
This LED is labeled “b” in Diagram 2.
- If the external
dig-a
function is “On” as indicated by the LED, the AD11 will lock to either
an AES or SPDIF digital audio signal a
pplied to the “
clock in
” BNC connector on the rear
panel.
- If the
dig-a
setting is “off,” the AD11 will not lock to external AES or SPDIF sync inputs.
-
Use of a digital audio signal that contains “muted audio” (“digital black”) is recommended
as an external sync signal to minimize jitter effects. AES sync is preferable to SPDIF sync.
-
aes
and
spdif
. These settings determine the configuration of the digital output format. The
digital audio signal from
both
the XLR and RCA digital outputs will contain the same digital
code format, as determined by these settings. The output format
must be
either AES or
“SPDIF” (IEC 60958 type II), and the setting function is interlocked so that one of the two
settings is always active.
-
phantom
. This function is controlled separately for each channel, and
automatically
becomes inactive for gain settings of 12dB or less
. The +48V phantom power function is
enabled on the left channel input when the
left
channel LED is on, and is enabled for the
right channel input when the
right
channel LED is on (for gain settings from 20 to 65dB).
Please Note: Phantom power turn “on” is ramped to minimize the possibility of
damage to ribbon microphones. However, caution is still advised when using ribbon
microphones with the AD11, especially vintage ribbon microphones.
-
sat.
The AD
11 features Lavry’s exclusive digital tape saturation emulation (“Soft
Saturation
”) which can be enabled and disable separately for each channel. This function
provides peak level control without attack and release times,
and automatically adds 3 dB’s
of gain to the digital output
for signals below “-3dBFS.”
- W
hen this function is enabled, signals below “
-3
” on the AD11’s meters are completely un-
altered (linear), and signal peaks above this level are progressi
vely “rounded-off” in a
manner similar to analog tape saturation.
- Internally, s
ignals that would normally reach “0dBFS” are reduced to -3dBFS, thus allowing
the
sat
function to raise the
average
signal level
by 3 dB’s (for signals below the “saturation
threshold
”). This also causes the
peak
digital output level to be
restored to “0dBFS.” As a
result, i
t is still possible to “clip” the output signal if this input signal level is exceeded.