SoundCraft SPIRIT 8, Руководство пользователя

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Page 7
STEREO INPUTs, CASS/CD INPUTS
Accept 3-pole `A’ gauge jacks, or 2-pole mono jacks which will automatically ground
the ‘cold’ input. Use these inputs for sources such as keyboards, drum machines, synths,
tape machines or as returns from processing units. The input is BALANCED for low
noise and immunity from interference, but you can use UNBALANCED sources by
wiring up the jacks as shown, although you should then keep cable lengths as short as
possible to minimise interference pick-up on the cable. Note that the ring must be
grounded if the source is unbalanced. Mono sources can be fed to both paths by plug-
ging into the Left jack only.
STEREO RETURNS
Similar to the Stereo Inputs. Input gain is sufficient to allow the connection of +4dBu
professional or -10dBV semi-professional equipment. HF and LF Equalisation is included
on Returns 1,3,5 & 7 for those sources which need additional treatment.
Mix INSERTS, GROUP INSERTS
The unbalanced, pre-fade Mix insert point is a break in the output signal path to allow
the connection of, for example, a compressor/limiter or graphic equaliser. The Insert is
a 3-pole ‘A’ gauge jack socket which is normally bypassed. When a jack is inserted, the
signal path is broken, just before the mix fader.
The mix signal appears on the TIP of the plug and is returned on the RING. A ‘Y’
lead may be required to connect to equipment with separate send and return jacks as
shown below:
Left Signal
Right Signal
Ground
Headphones
Signal -
Screen
Signal Send
Signal Return
Gnd/Screen
Tip
Ring
Sleeve
Mix & Group Inserts
Mix Outputs
Group Outputs
Matrix Outputs
Aux Outputs
Rec Outputs
Direct Outputs
1. Screen
3. Signal -
2.
MIX, GROUP & MATRIX
The Mix, Group and Matrix outputs are on 3-pole XLR male connectors, wired as
shown on the left and below, and incorporate impedance balancing, allowing long cable
runs to balanced amplifiers and other equipment.
Typical uses would be feeds for speaker fills, effects speakers or multitrack tape
sends.
Send to External Device
Signal Send
Screen
Signal Return
Insert Point
Return from External Device
(a) Balanced Connection
To External Device
Signal
Signal
Screen
Screen
Signal Ground
Signal Ground
Experience has shown that sometimes it is better
not to connect screen at external device end.
From SPIRIT 8
Impedance Balanced
Output
From SPIRIT 8
Impedance Balanced
Output
To External Device
(b) Unbalanced Connection