Precision 8
OPERATION MANUAL
11
Front Panel Controls
1
Phase reverse selector. Output signal polarity is reversed when the
φφ
button is
depressed.
2
Phantom power selector. Phantom power (+48V) is activated when the
48V
button
is depressed. Avoid selecting phantom power if you are using a ribbon
microphone. While not required, it is advisable to de-select
48V
when using a
dynamic microphone or a
DI
input.
3
Overload warning indicator.
OL
illuminates (and holds) at +26 dBu which is 5 dB
below actual overload. Depress
RESET
10 to clear
OL
.
4
Peak-Hold indicators. These are provided to help optimize level setting when the
Precision 8
is remotely located from the device to which it is connected. The
PK
indicator activates (and holds) at the level selected on the
PEAK REFERENCE
selector 9 . The
-3
indicator activates at peak level minus 3 dB. The
-6
indicator
activates at peak level minus 6 dB. Generally, the
PEAK REFERENCE
selector is
set for the maximum level you want to present to your mixing console, recorder,
etc. Depress
RESET
10 to clear
PK.
NOTE:
Only the
OL
light indicates impending preamp overload. The red
PK
light
simply indicates that the signal has exceeded the level selected on the
PEAK
REFERENCE
switch.
Note that the overload level of the
Precision 8
is +31dBu at the output. This level
exceeds the input capability of some devices (check manufacturer’s specifications).
In other words, it may be possible to cause overload distortion in the connected
device even though the
Precision 8
level indicator does not show a red light. We
16
64
30
35
40
45
50
55
16
64
30
35
40
45
50
55
16
30
35
TRUE
systems
1
2
SIG
+4
-6
-3
48V
Ø
OL
3
PK
SIG
+4
-6
-3
48V
OL
PK
SIG
+4
-6
-3
48V
OL
PK
ON
MI
D
SIDE
1
2
3
4
5
6
8
7
Ø
Ø