Lake People ADDAC F45 Bedienungsanleitung Seite 8

-The balanced AES/EBU sync input is equip-
ped with an XLR connector and meets AES
3(11) - 1992 recommendations. It is transfor-
mer balanced, impedance 110 ohms.
The valid clock range is 28 ... 56 kHz or ...108
kHz in the 96 kHz Version.
-The coaxial wordclock input is equipped with a
BNC connector.
Input impedance is selectable to 75 ohms and
10 kohms by means of an internal jumper.
Ex works the impedance is set to 75 ohms.
The valid clock range is 28 ...56 kHz.
SELECTING A SYNC SOURCE
The switch to select the sync source is found on
the front panel and has three positions:
- "AES" to activate the external AES/EBU
sync input - the corresponding yellow LED is
lit.
- "INT"ernal to select one of the internal sync
frequencies.
- "WCLK" to activate the external wordclock
input - the corresponding yellow LED is lit.
When "INT"ernal was selected, with the next
switch one of two or three internal sample fre-
quencies may be selected.
As a standard F45 is equipped with 44.1 kHz,
48 kHz (and 96 kHz) oszillators.
A faulty signal on the external sync inputs is
displayed by the red "ERROR"-LED.
A valid sample-rate is shown by the green
"LOCK"-LED.
Furthermore the actual sample rate is displayed
by three yellow LED´s for the standard frequen-
cies "96, 88.2, 48, 44.1 and 32 kHz" as far as
the computed frequency is within a range of +/-
200 Hz around the above values.
Sample rates outside this window but in the
range of 28 ... 56 (108) kHz are only displayed
by the green "LOCK"-LED.
A faulty sample rate or data errors of the selec-
ted sync source are shown by the red "ER-
ROR"-LED. Simultaneously the A/D converter is
muted.
The reasons are generally:
- a week signal on the selected sync input
- unvalid data on the selected sync input
- no sync signal present
- sample-rate outside the range of 28 ... 56
(108) kHz
THE FORMAT SWITCH
The "FORMAT"-switch influences the channel
status bit of the A/D converter (see "BIT SET-
TING" table on page 13):
- Professional mode is selected when the yel-
low "PRO"-LED is lit. The channel status bits
of the digital output word from the A/D con-
verter are set to professional mode.
- Consumer mode is selected when the yellow
"PRO"-LED is not lit. The channel status bits
of the digital output word from the A/D con-
verter are set to consumer mode.
THE MUTE SWITCH
With the "MUTE"-switch a mute and recalibrati-
on of the A/D converter can be processed.
HINT:
The "MUTE"-switch does not affect any function
of the D/A converrter.
An active mute is displayed by the red "MUTE"-
LED and additionally by the red "ERROR"-LED.
A-to-D SECTION
THE ANALOG INPUTS
The analog inputs are situated on the rear pan-
el, equipped with balanced XLR connectors.
XLR pinout corresponds to AES 14-1992 re-
commendations:
1 = Ground, 2 = (+) Phase, 3 = (-) Phase
Input impedance is 5 kOhms, while input sensi-
tivity for digital full scale can be calibrated indi-
vidually for both channels within a range of +2
... +22 dBu approximately.
8