Crown PIP-RPA Reference Manual page 8

fore it removes the attenuation. The
result is a fast transition when the
duck circuit is activated and a slower,
smooth transition when it is deacti-
vated.
The duck level controls have a wide
0–70 dB range as shown in Figure
3.6. (The setting numbers in the table
in Figure 3.6 refer to the tick marks on
the duck level pot in Figure 3.5.)
Fig. 3.5 Duck/Voice-Over Control
(Inverted for Readability)
Note: Note: Note: Since Inputs A and C have Note: Note:
independent ducking circuitry, they
Fig. 3.6 Duck Level Settings
Page 8
may be used to provide two different
ducking levels for lower priority in-
puts. For example, assume the rout-
ing/priority switch has been set to the
"l" setting (as shown in Figure 3.4)
and the Tie function has been turned
on. This setting makes Input A priority
1, Input C priority 2, and Inputs B and
D priority 3. If the ducking level for A
is 70 dB, and the ducking level for C
is 46, Inputs B, C and D will all duck 70
dB when there is a signal over the
sensitivity threshold on A. Inputs B
and D will duck 46 dB when a signal
on Input C surpasses its threshold. In
this scenario, background music on B
and D would be pulled under by a
normal page on Input C, and Input A
could be reserved for emergency an-
nouncements.
3.3 Setting the Voice-Over
Sensitivity
If you gave all four main audio inputs
the same priority, skip to Section 3.4.
When two or more inputs have a
different priority, the voice-over sen-
sitivity circuits set the points at which
Input A and C will activate their re-
spective ducking circuits.
Only Inputs A and C have signal-
sensing capability so they will al-
ways have the highest priorities.
Each voice-over sensitivity circuit
senses the input signal level after the
input level control (the pot accessed
through the front panel of the PIP)
and before the remote-controlled at-
tenuator. This is shown in the block
diagram in Figure 3.19. This means
that the remote attenuation setting
does not affect the duck level.
Figures 2.1 and 3.5 show voice-over
sensitivity controls. They look identi-
Reference Manual
P.I.P.-RPA