Benchmark ADC1 USB Instruction Manual page 8

Setting the Fixed Sample Rate on
the Main Outputs
Press-and-release the Mode Switch up
•
repeatedly to cycle through the
available sample rates. The four LED's
in the upper left of the Mode Display
indicate the sample rate, as illustrated
in the diagrams below.
Black = Lit
White = Not Lit
Gray = Irrelevant
44.1kHz 48 kHz
96 kHz 176.4 kHz
Sample Rate Display
Main Output
Column one of the Mode Display has a '48'
LED and a '44' LED. These indicate sample
rates of 48 kHz and 44.1 kHz respectively.
Column two has an 'x4' LED and an 'x2' LED.
These indicate 4x or 2x multipliers. Multiply
the sample rate shown in column one by the
multiplier shown in column two. For example,
if the '44' and 'x2' LED's are on, the sample
rate is 88.2 kHz (44.1 x 2 = 88.2).
ADC1 USB Instruction Manual – Rev C
Aux Output
The Aux Output can be programmed to mirror
the Main Outputs (bit for bit), or it can
provide a lower-resolution copy of the
converted signal at an independent sample
rate. Column three of the Mode Display
displays the Aux Output mode setting.
NOTE: The Aux Output setting does not affect
the Main Outputs in any way.
Aux Output Programming
Press-and-release the Mode Switch repeatedly
to cycle through the Aux Output mode
settings. The right-hand column of LED's in
the Mode Display indicates the Aux Output
mode as illustrated in the following diagram:
88.2 kHz
Exact Copy of
Main Outputs
192 kHz
ADAT or AES/EBU Selection for
the Optical Output
The Optical Output (one of the three Main
Outputs) can provide either AES/EBU or ADAT
format. The AES/EBU mode works with most
S/PDIF optical inputs.
Press and hold the Mode Switch down to
change the Optical Output mode. The
bottom-center LED indicates the optical mode
as illustrated in the following diagram:
When ADAT is active, S/MUX is automatically
enabled at all 2X and 4X sample rates (88.2
kHz, 96 kHz, 176.4 kHz, and 192 kHz).
44.1 kHz
16 bit
(24 bit) Dithered
Off = AES/EBU on Optical
Output
On = ADAT on Optical Output
48 kHz
16 bit
Dithered
Page 8