Operations Manual
LE3000S
5
DECODES 24 BIT DATA FROM TWO HIGH-SPEED 16 BIT WORDS
• 2:1 DOWNSAMPL
SYNCHRONOUS DOWNSAMPLING FROM 88-96K TO 44-48K
24 High Frequency Sample Rate Conversion
IN:PRO 44 44100 50/15uS
OUT:CON 44 96.0 kHz XTAL
Up/Down Sample Rate Conversion between high-speed modes (88.2 kHz and 96 kHz sample rates) and
low speed modes (44.1 kHz and 48 kHz sample rates) is accomplished by the Model 3000S. The input is
automatically sensed by the 3000S, and is displayed on the top line. The output frequency is selected by
the mode select procedure above.
DC Removal, Boost/Cut, and Delay functions are disabled in high-speed output modes. Conversion
between 96 kHz and 88.2 kHz is not possible.
24 Bit Encode and Decode
IN:PRO 44 44100 50/15uS
OUT:CON 44 24 BIT ENCODE
The 24 BIT ENCODE mode is used for encoding a 48 kHz or 44.1 kHz 24 bit stereo signal into a 96 kHz
or 88.2 kHz 16 bit stereo signal. The 24 BIT DECODE mode is used to reconstruct the original 24 bit
stereo signal. Both modes operate at a synchronous 2:1 or 1:2 data rate; the original bits are not modified
in any way.
This mode allows high-sample rate 16 bit recorders, such as those made by Pioneer, to be used for wide-
word recording at conventional sample rates.
2:1 Synchronous Downsampling
IN:PRO 44 44100 50/15uS
OUT:CON 44 2:1 DOWNSAMPL
A 2:1 synchronous downsampling mode has been provided. This mode has superior THD and dynamic
range for down sampling from the AD122-96. (-125 dB THD+N).
The mode is invoked by selecting
2:1 DOWNSAMPL
on the main screen for the output mode.
If the input signal is switched from high sampling (88-96kHz) to low sampling (44.1-48kHz) the 3000S will,
in this mode, pass the signal through 1:1 (similar to
BYPASS
). This allows quick selection of sample-rate
for listening comparisons.
All dither modes and delay are active in this mode; DC Removal and Boost-Cut are not available.
Summary of Contents for 3000S
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