Mixers, The In's And Out's; Vco - Lexicon Prime Time 93 Owner's Manual

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be continuously adjusted from the displayed value down to 50% of that value,
e.g. 128 msec can be adjusted down to 64 msec. A maximum sweep range of one
second is possible with optional memory. Uncalibrated delays set with
DELAY ADJUST are indicated with a bold UNCAL light centrally located in the
display window. With DELAY ADJUST in the detented
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(cal)
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position, M.93
locks into an accurate crystal time base for the actual indicated delay
time (the displayed value times the multiplier).
2.3 MIXERS, THE IN'S AND OUT'S
The INPUT MIX supplies the input signal to the digital delay processor. It
consists of four functions with independently adjustable level controls and
a MASTER control which determines the level of the resultant blend. The four
functions are two identical but independent inputs,IN and AUX, and two delay
taps, A and B. The delay taps are recirculated from the outputs through
variable 6 dB/octave ROLLOFF filters which adjust the high end rolloff
frequency from 15 kHz to 800 Hz.
Monitoring the delay processor input, the HEADROOM indicator displays peak
signal levels on a sequential array of five LED's indicating from 40 dB
below limit to 0 dB (limit). When the 20 dB LED just comes on, for example,
there is 20 dB of dynamic range left before limit, i.e. 20 dB of headroom.
Optimum levels can be achieved by proper adjustment of the INPUT MIX MASTER
control which provides up to 6 dB of gain and up to 25 dB of attenuation.
The OUTPUT MIX supplies signal to the MASTER OUTPUT. Like the INPUT MIX,
it blends four functions of which two are the inputs, IN and AUX, and two
are the delay taps, A and B. The overall level is adjusted with the MASTER
control which can provide from zero to infinite attenuation. When in danger
of overloading the output stage, the OVERLOAD indicator will light. The
OVERLOAD function indicates the levels of the four mixer functions only and
is not affected by the MASTER control. For additional flexibility IN, A, and
B functions can be inverted with their respective PHASE INVERT switches be-
fore the OUTPUT MIX. The PHASE INVERT switches also determine the phase of
the recirculated delays to the INPUT MIX.
2.4
vco
The voltage controlled oscillator (VCO) provides continuously variable delay
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