REAR PANEL CONNECTIONS
Mic/Line Input
This “combo” jack provides balanced inputs to the microphone preamplifier. The XLR connection is in parallel
with the front input jack XLR. The input impedance of both XLR connections is variable by the front panel
Impedance knob.
The rear 1/4” input of the combo jack overrides the front panel XLR input when used. This input’s impedance
is NOT affected by the front panel Impedance control and is fixed at 20K Ohms.
The Front panel Instrument input overrides the rear jack when it is used.
Mic Preamp Output
This 1/4” T/S unbalanced jack provides a direct signal from the microphone preamplifier, ahead of the EQ
and dynamics processors. This output can be used in conjunction with the INSERT INPUT jack to insert
external signal processors between the main preamp section and the EQ and dynamics processing of the
Voice Channel™.
Insert Input
This 1/4” T/S unbalanced jack is an input to the EQ and dynamics processing sections. This input can be
used in conjunction with the MIC PREAMP OUTPUT jack to insert external signal processors between the
main preamp section and the EQ and dynamics processing of the Voice Channel™.
Balanced Output
The analog output of the Voice Channel™ is available on both a 1/4” TRS balanced jack and an XLR jack.
This output is active balanced, and will adjust to balanced or unbalanced termination without gain change. The
LED and analog meter monitor the level present at this output. “0” VU on the analog meter corresponds with
+4dBu (about 1.2 Volts RMS).
A/D Main Insert and A/D CH2 Insert
Signal processing can be added between the analog output of the Voice Channel™ and the “left” and “right”
channels of the A/D converter by using the A/D MAIN INSERT and the A/D CH2 INSERT respectively. Use a
1/4” T/R/S (stereo) cable. The Ring is the output of the preamp and the Tip is the input to the A/D converter.
In order to use just the A/D converter and not the Voice Channel™ preamp, simply plug a standard 1/4” T/S
phone cable into either A/D insertion jack.
Wordclock Input and Thru Jacks
The WORDCLOCK INPUT is used to externally sync the Voice Channel™ to a master clock source. The
BNC WORDCLOCK INPUT jack is connected directly to the BNC WORDCLOCK THRU jack, providing the
ability to loop through the Voice Channel™ and connect other devices to the wordclock sync source, saving
the use of a BNC T–adapter.
The input is high impedance thus leaving the wordclock connection
unterminated
. (A 75 Ohm BNC
terminator should be used on the WORDCLOCK THRU jack if the WORDCLOCK INPUT jack is used only by
itself.)
Select the EXT/16 or EXT/24 sample rate setting on the front panel to utilize External Wordclock mode.
Refer to FIGURE 7 for wordclock termination examples.
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