Crown PIP-EDCB User manual

125511-1
11/97
Printed on
recycled paper.
P.I.P.–EDCb
© 1997 by Crown International, Inc., P.O. Box 1000, Elkhart, IN 46515-1000
U.S.A. Telephone: [phone]. Fax: [phone]. P.I.P. modules are
produced by the Professional Audio Division of Crown International, Inc.
Trademark Notice: Crown
®,
Macro-Tech
®,
Com-Tech
®,
IOC
®and
P.I.P.
®are
registered trademarks of Crown International, Inc. Other trademarks are the
property of their respective owners.
Programmable
Input Processor (P.I.P.)
INPUT
3
12
GND
PUSH
CH-2 CH-1
PUSH
INPUT
EDC
b

P.I.P.–EDCb
Page 2

P.I.P.–EDCb
Page 3
1 Welcome
Thank you for purchasing the
Crown P.I.P.-EDCb . P.I.P.
®
modules are designed to
quickly install in the back of
many Crown amplifiers. P.I.P.
stands for “Programmable In-
put Processor.” Their versatile
features expand the capabili-
ties of your amplifier and en-
ableyoutocustomizeitforyour
particular needs.
The P.I.P.-EDCb addsstate-of-
the-art error-driven compres-
sion, signal-driven input com-
pressionwithadjustablethresh-
old and a configurable sub-
sonic (high-pass) filter to each
input of your amplifier. Three
conditions can cause a com-
pressor to activate: (1) if the
compressor receives an “er-
ror” signal from the amplifier’s
input/outputcomparator( IOC
®)
circuitry, (2) if the input signal
exceeds its adjustable thresh-
old,or(3)ifanexcessivelylarge
input signal level is sensed.
The compressor circuits acti-
vate ahead of all preamp cir-
cuitry resulting in low distor-
tion.
Each channel’s compressor
can operate independently or
both channels can be tied to-
gether causing the compres-
sors to track each other.
Balanced XLR connectors are
provided for quick connection.
Feature Summary
❏Error-driven compression
for each channel.
❏Variable threshold, signal-
driven compression for
each channel.
❏User-selectable fast/slow
attack and release times.
❏Each compressor can be
turned off.
❏Variable subsonic (high-
pass) filter.
Programmable
Input Processor (P.I.P.)
INPUT
3
12
GND
PUSH
CH-2 CH-1
PUSH
INPUT
EDC
b
Fig. 1.1 P.I.P.-EDCb

P.I.P.–EDCb
Page 4
2 Facilities
A. Input Connectors
A balanced XLR connector is
providedforinputtoeachchan-
nel. The pin assignments are
labeledonthefaceofthe P.I.P.
Refertoyour amplifier Owner’s
Manual for wiring details.
CAUTION: Input channel 2
should NOT be used in either
monomode,anditslevelcon-
trolshouldbeturnedoff(fully
counterclockwise).
B. DIP Switches (S1, S2)
A nine-segment DIP switch is
provided for each channel.
Segments 1–6 select the sub-
sonic corner frequency and
segments 7–9 configure the
compressor.S1controls chan-
nel 1; S2 controls channel 2.
C. Compressor Threshold
Each channel’s compressor
thresholdcan be adjusted with
these controls. They set the
Fig. 2.1 P.I.P.-EDCb (Bottom View)
12345
ON
6789
S2
12345
ON
6789
S1
Z1
ON OFF
COMPRESSOR
TRACKING
AA
10
0
5
10
0
5
BCDCB

P.I.P.–EDCb
Page 5
maximum output voltage and
can be used to protect loud-
speakers and listeners. When
turned to the maximum setting
(fully clockwise), the compres-
sor responds only to the
channel’s IOC error signal.
When set lower, the compres-
sor responds to a maximum
audio level (see Figure 3.4).
D. Tracking Jumper (Z1)
Movingthis jumper to the“ON”
position causes the compres-
sors to track each other.

P.I.P.–EDCb
Page 6
3 Installation
Before installing the P.I.P. mod-
ule,it should first be configured.
3.1 P.I.P. Configuration
1. Setthecornerfrequency(–3 dB
frequency)foreachsubsonic
filter withDIP switchesS1 and
S2(seeFigure3.2).Noticethat
the first six switch segments
control the corner frequency.
Fig. 3.2 S1/S2 DIP Switch Settings
36 Hz Corner Frequency
32 Hz Corner Frequency
28 Hz Corner Frequency
24 Hz Corner Frequency
Slow Attack / Slow Release
Slow Attack / Fast Release
Fast Attack / Slow Release
Fast Attack / Fast Release
Compressor OFF
Function
ON
ON
OFF
OFF
1
ON
OFF
ON
OFF
2
ON
ON
OFF
OFF
3
ON
OFF
ON
OFF
4
ON
ON
OFF
OFF
5
ON
OFF
ON
OFF
6
OFF
OFF
ON
ON
7
OFF
OFF
OFF
OFF
ON
8
DIP Switch (S1 or S2)
OFF
ON
OFF
ON
9
Subsonic
Filter
Compressor
Slow Attack / Slow Release
Slow Attack / Fast Release
Fast Attack / Slow Release
Fast Attack / Fast Release
Compressor
Setting
5 msec
10 msec
1.25 msec
1.5 msec
Approximate Time
Attack Release
900 msec
220 msec
900 msec
220 msec
Figure 3.2). Notice that the
last three DIP switch seg-
ments control attack and re-
lease times. The actual attack
time depends on the release
time. Figure 3.3 provides ap-
proximate times for each set-
ting.
3. Adjust each channel’s com-
pressor threshold using the
compressor threshold pots
(see Figure 2.1, “C”). Each
Fig. 3.3 Compressor Attack and
Release Times (Approximate)
2. Use DIP switches S1 and S2
to configure each compres-
sor’s attack and release
times (fast or slow), or turn
each compressor off (see
12345
ON
6789
Fig. 3.1 S1/S2 DIP Switch

P.I.P.–EDCb
Page 7
pot has a scale with ten marks
(orsettings) whichcorrespond
to the typical thresholds
shown in Figure 3.4.
4. Move the
P.I.P.’s tracking
jumper (Z1) to the “ON” posi-
tion to make the compressors
track each other. In the “OFF”
position,eachcompressorwill
operate independently (refer
to Figure 2.1, “D”).
Mark Max Sine
Wave RMS
Voltage
Watts into
8 Ohms
13.5
14
14.5
15
16
17
18
19
20
22
24
26
29
32
37
42
48
57
70
92
96
23
25
26
28
32
36
41
45
50
60
72
85
105
128
171
220
288
406
612
1058
1152
0
1
2
3
4
5
6
7
8
9
10
Macro-Tech 3600VZ and
36x12 (Channel 1) All Others
9.5
10
10.5
11
11.5
12
13
14
15
16
17
19
21
23
26
30
35
41
50
71
102
Max Sine
Wave RMS
Voltage
Watts into
8 Ohms
11
12
14
15
17
18
21
25
28
32
36
45
55
66
85
113
153
210
313
630
1300
Fig. 3.4 Compressor Threshold Settings
3.2 Installation Procedures
Youmayneedaphillipsscrew-
driver to remove the existing
P.I.P. moduleorpanelfromyour
amplifier.
CAUTION: Before connecting
this or any P.I.P. to your ampli-
fier, it is important to turn its
level controls down, turn it off

P.I.P.–EDCb
Page 8
1. Turn down the level controls
(fullcounterclockwise),turnoff
theamplifierandunplugitfrom
the AC power source.
2. Remove the existing
P.I.P.
module or panel (two screws).
For PIP2 amplifiers, this may
involve disconnecting the
P.I.P. froma PIP2 inputadapter
(see Figures 3.6 and 3.7). If a
PIP2 input adapter is already
present, do not remove the
ribbon cables from the
adapter. Otherwise you will
have to reconnect them in the
next step.
3.
Standard P.I.P. Amplifiers :
Align the edges of the
P.I.P.–
EDCb
in the P.I.P. card rails
and firmly push the unit in until
it is seated against the
mounting bracket (see Figure
3.5).
PIP2 Amplifiers: (Requires a
PIP2 inputadaptor.Crownpart
number Q43528-1.) Connect
the
PIP2 input adapter to the
two input cables of the
amplifier (see Figure 3.6).
Notice that the
PIP2 input
adapter should be positioned
with the
P.I.P. edge connector
on top and facing away from
the amplifier. The 20 pin cable
(A) is connected first, then the
18 pin cable (B) is connected.
Both ribbon cables should
extend below the
PIP2 input
adapter.
Next, insert the edge
connector of the
P.I.P.–EDCb
A
B
B
A
18 PIN (B)
20 PIN (A)
Q43528-1
FROM AMPLIFIER
P.I.P.
MODULE
BACK PANEL
OF PIP2
AMPLIFIER
PIP2 CONNECTOR
BOARD
Fig. 3.6 PIP2 Input Adapter
Connection
Fig. 3.7 Installation into a
PIP2 Amplifier
P.I.P.
MODULE
BACK PANEL
OF AMPLIFIER
Fig. 3.5 Installation into a
Standard P.I.P. Amplifier
andremovetheACpower.Don’t
touch the circuitry. Even though
the amplifier is off, there could
stillbeenoughenergyremaining
to cause electric shock.

P.I.P.–EDCb
Page 9
intothe PIP2 inputadapter(see
Figure 3.7) and insert the
assembly into the
P.I.P.
opening in the back of the
amplifier.
4. Secure the
P.I.P.–EDCb with
the two screws and lock
washers provided. (The lock
washers are important
becausetheybondthe
P.I.P. to
the chassis ground of the
amplifier.)
5. Connect input and output
wiring.
6. Plug in the amplifier and turn it
on.Adjustitslevelcontrolstoa
desired setting.
Do not tamper with the circuitry.
Circuit changes made by unau-
thorized personnel, or unautho-
rizedcircuitmodificationsarenot
allowed.
Remember: Crown is not liable
for any damage resulting from
overdrivingothercomponentsin
your sound system.
CAUTION: IF PHONE JACKS
ARE PROVIDED ON THE AM-
PLIFIER BACK PANEL, DO
NOT USE THEM AS INPUTS
WITH THIS
P.I.P. INSTALLED.
The amplifier phone jacks are in
parallelwiththe
P.I.P. outputs,so
theycanbeusedto“daisychain”
theinputsofseveralamplifiers.If
you do this, remember that the
signal feeding the other amplifi-
ers will be filtered and com-
pressed too.
Important:Iftheamplifierisused
in either Bridged-Mono or Paral-
lel-Mono mode, you must turn
the Ch. 2 amplifier level control
off (fully counterclockwise). The
input and level control of Ch. 2
are not defeated in mono mode
soanysignalappliedtoCh.2will
beat against the signal in Ch. 1.
Refer to the amplifier
Reference
Manual for more information
about Bridged-Mono or Parallel-
Mono modes of operation.

P.I.P.–EDCb
Page 10
Only one channel shown.
Electronic image for this figure
were not included due to quality
considerations. Please refer to
the printed documentation.