How to use ''channel patching" accessory jack
The accessory jack (Tip, Ring, Sleeve) is provided on each input channel to allow insertion of
outboard signal processing devices (example: compressor/limiters, noise gate, equalizer, etc.) into the signal path. The jack functions as both an output and an input (Tip=Receive,
Ring=Send, Sleeve=Shield). Connection cables for this purpose should be wired as illustrated in Fig. 2.
Inserting a plug into the jack interrupts normal signal flow and places the external device into
the circuitry just prior to the input equalizer section. (See Fig. 1.)
Figure 1
*The connection marked 
of the shield and sleeve is determined by the type of equipment to be connected.
Figure 2
The accessory jacks may also be used as a direct output for each input channel, allowing direct
connection to a
To unbalanced input of other input channels to mix dry signals with processed signals.
Figure 3
Normal impedance of the accessory send is greater than 10k ohms and the receive impedance is 10k ohms. Both nominal levels are at 0dB (0.775V).
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