Crest Audio HP-EIGHT, Owner'S Manual

Page: 43 / 84

p. 43
groups
group connectors- rear panel
The HP-Eight group output connections are located on the Master rear output
panel. Each group features a 1/4” TRS output connector, along with a 1/4” TRS
Insert connector.The output is a ground-compensated, impedance-balanced TRS
jack. For wiring purposes, treat this connector exactly like a balanced output.
When connected to a balanced input,that input will see equal impedance on each
leg.When connected to an unbalanced input, the ground-compensation circuitry
will act to reduce the ground-signal differences between the console and the
remote gear.
The TRS Insert jack is wired as Tip=Send, Ring=Return, Sleeve= Audio Gnd.This
is the “industry-standard” wiring scheme for most single-jack inserts.The Insert
send-point is located directly after the group mix amp, the Insert return feeds the
top of the group fader, or the top of the level pot if Fader-Flip is active (see Block
Diagram).
group output
1/4" TRS
jack
The group output signal is available at this output jack.The output jack is
impedance-balanced, ground-compensated.
Tip is +Drive, Ring is -Drive Return, Sleeve is Chassis Ground.
Send (Drive) impedance is 50
Ω
Ring impedance is 50
Ω
to Audio Ground
Nominal Operating Level= +4dBu
Max Output Level= +21dBu (into 2k
Ω
or higher)
insert jack
1/4" TRS
jack
This switching 1/4” TRS jack allows an external signal processor to be
inserted into the signal path of the group.The tip carries the SEND signal from
the group, and the ring carries the RETURN signal back to the group.The
Insert-Send point is located directly after the group mix amp, the Return comes
back at the top of the group level control.
Tip is Send, Ring is Return, Sleeve is Audio Ground.
Send (output) impedance is 50
Ω
Return (input) impedance is 5K
Ω
Nominal Operating Level= -2dBu
NOTE: To avoid any degradation of the HP-Eight’s group signal, any processing
gear patched into the group insert jack should have a low impedance output
(<100
Ω
) and must be capable of cleanly driving a 2K
Ω
load to +21dBu.
3
T= Out+
R= GND (50
Ω
)
S= CHS
T= Send
R= Rtn
S= GND
+4dBu • 50
Ω
Ground-Comp
Impedance Bal
TRS
-2dBu
Unbal Send • 50
Ω
Unbal Rtn • 15K
Ω
TRS
Bus Inserts Grp•Aux Outputs
rear panel legend info
NOTE:
The Fader-Flip switch
does not change the function
of any of the rear-panel jacks.
The Group Output and Insert
jacks are always located
here. Similarly, the Aux
Output and Insert jacks
always retain their same
function.
+