Crown PIPSLM Brochure

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@crown

* System® Product Reference

* System® Product Reference

®

®

IQ System P.I.P.-SLM

AUDIO IN

CH-2 CH-1

Programmable
Input Processor

OVERVIEW

An IQ System amplifier is a Crown am­plifier (MA Series, CT Series, or Refer­ence Series) that is equipped with an IQ
P.I.P.® Programmable Input Processor
input module. The IQ P.I.P.-SLM is one
such input module. The P.I.P.-SLM in­cludes the “basic” and “SLM” feature
sets, auto-standby and EEPROM
memory backup. The P.I.P.-SLM is fully
PIP2 compatible. The P.I.P.-SLM is an
IQ2 component and requires an IQ
compatible interface for communica­tion with a computer.

CROWN AMPLIFIERS

There are three families of Crown ampli­fiers which are fully IQ System compat­ible. They include the Macro-Tech Se­ries for professional PA, the Com-Tech
Series for commercial installations, and
the Reference Series for studio applica­tions. In the case of the P.I.P.-SLM,
however, it should only be installed in a
PIP2 amplifier such as the CT “10” Se­ries.

P.I.P.-SLM PROCESSING

The P.I.P.-SLM allows you to communi­cate directly with an amplifier whether it
is sitting on a bench next to you or
mounted in rack hanging from a loft.
Before the advent of IQ, it was impos­sible to directly control and monitor
amplifiers unless you were physically
present at the amplifier. Even then your
abilities were limited by the physical
features of the amplifier. Today you can
control amplifier attenuation in half dB
steps, and control a host of other func­tions. Unlike other amplifiers, you also
have access to thermal headroom infor-

SLM#.###

AUX

OUT IN

P.I.P.-SLM

mation and visual status of signal level
and distortion.

The P.I.P.-SLM module includes
EEPROM memory backup. This feature
allows the onboard processor to main­tain its memory in the event that main
AC power is lost, disconnected, or
switched off at the front panel.

The System and Load Monitor feature

2

set adds the ability to perform reference
and test sweeps and plot results, then
report the results as pass-fail based on
your defined criteria. Additional auto­mation includes auto-standby for en­ergy conservation.

PHYSICAL ATTRIBUTES

All P.I.P.-SLM is about the size of a 3 x
5 card, and the panel face (shown
above) mounts flush with the rear panel
of the amplifier.

Front Panel

• Euro-style 3-pin barrier block audio
input connections per channel.

• Euro-style 4-pin barrier block connec­tor for Crown Bus data loop.

VALUE

ON

124

8163264128

SW1

12345678

TOP VIEW

SW1 Address Switch

Programmable
Input Processor

DATA CROWN BUS

OUTIN

• Euro-style 3-pin barrier block connec­tor to send or receive external control
voltages.

• DSPI (data) LED informs you when the
unit is receiving data, and can also be
used for troubleshooting.

• Dual function memory reset switch is
accessible from the front panel, how­ever it is recessed and unmarked to
prevent unintended operation. Press
once to reset unit to custom default,
press and hold to reset to factory de­fault.

Circuit Boards

• Two multi-layer printed circuit boards.

• Loop address eight segment DIP
switch. Up to 250 IQ amplifiers may
operate on a single data loop.

• PIP2 Jumpers (set to OUT position
when used in a PIP2 amplifier) to com­pensate output meter scaling depend­ing on amplifier type.

• PIP2 Resistor Packs must be installed
when the module is installed in a PIP
amplifier and must be removed if used
in a non-PIP2 amplifier.

Note: The pri­mary purpose of this module is to sup­port internal load monitoring. This can
only be done with a PIP2 amplifier.

DATA CROWN BUS

SLM#.###

AUDIO IN

CH-2 CH-1

AUX

OUT IN

OUTIN

BOTTOM

View of SW1 Address

Switch

2

SW1

P.I.P.-SLM (Page 1 of 3)

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AMP OUTPUT

VOLTAGE

CH 1

CH 2

* System® Product Reference

®

P.I.P.-SLM (Page 2 of 3)

MONITOR INPUTS

IOC

ODEP

AUX IN

AMP OUTPUT

CURRENT

PIP INPUT

LEVEL

+

-

BALANCED

AUDIO INPUTS

+

-

CH 1

CH 2

CH 1

CH 2

CH 1

CH 2

CONVERTER

BALANCE

TO SINGLE

ENDED CONV.

BALANCE

TO SINGLE

ENDED CONV.

A / D

DDS SINE

WAVE GEN.

DIGITALLY

CONTROLLED

ANALOG
SWITCH

Installation

Before installing the P.I.P.-SLM into the
amplifier you must first configure the
switches, jumpers, and install or re­move the PIP2 resistor packs as needed.
When initial configuration is complete,
remove the existing P.I.P. from the am­plifier and move the P.I.P. connector to
the P.I.P.-SLM. Set the amplifier sensi­tivity to the desired position. The ribbon
cable folds up as you insert the module.

IQ MONITORING

Refer to the P.I.P.-SLM Block Diagram.

• Pre-fade input levels (+20 to –40 dBu).

• Amplifier output signal level (0 to –40
dB re scaled rated output).

• IOC (Input/Output Comparator) indi­cates distortion >0.05%.

• ODEP (Output Device Emulation Pro­tection). ODEP is an amplifier circuit
that calculates thermal headroom of an
amplifier and is reported in IQ as a per­centage of thermal headroom used.

• Aux Port input sense.

REF VOL TAGE

RESET

AUX OUT

REM STANBY

DATA LED

IQ ADDR SWITCH

1

BUFFER

STAGE

2

INPUT MUX

A/D CONV.

MICROCONTROLLER

1

DIGITALLY

CONTROLLED

ANALOG

ATTENUATOR

2

P.I.P .-SLM Basic Block Diagram

IQ CONTROL

Refer to the P.I.P.-SLM Block Diagram.
The P.I.P.-SLM supports the complete
basic feature which consists of:

• Power (high voltage rails).

• Mute.

• Attenuation (0.5 dB steps from 0 to 80
dB).

• Polarity (XLR pins 2 and 3).

• Aux Port output voltage.

• DSPI/Data LED.

• Memory backup.

• User defined default memory.

• Output meter scaling.

AUTO STANDBY

Energy conservation is automated with
this function that allows the amplifier to
idle at a fraction of its normal idle draw.
Per channel with the following variables:
—On-Off
—Threshold (input)
—Turn-off Delay (minutes)
—Turn-on Delay (one switch for both
channels, when on adds a delay based
on address and when off the amplifier
powers up within 8 msec after breaking
threshold)

RECEIVER

OUTPUT

EEPROM

1

BUFFER

STAGE

2

INPUT

DRIVER

8K x 8

8K x 8

RAM

DROP-OUT

RELAY

1

POLARITY INVERT

& OUTPUT BUFFER

2

CROWN BUS

SERIAL

DATA INPUT

CROWN BUS

SERIAL

DATA OUTPUT

CH 1

AUDIO OUTPUTS

CH 2

SLM FUNCTIONS

System and Load monitoring is the major
feature benefit of the P.I.P.-SLM. The
purpose of the SLM function is to verify
repeatability of performance of the au­dio system. Reference data is first es­tablished and subsequent test sweeps
are performed to prove that system
operation is constant. The impedance
response test proves that the load per­formance is constant while frequency
response proves that the electronics
are a constant. When syncronized with
an external sweep generator (such as
the SLM-8) full system frequency re­sponse can be measured.

The signal generator is used to perform­ing sweeps or to produce a constant
tone. To perform a sweep you must
configure the generator and data ac­quisition. The tolerance criteria you set
determines whether the test will pass or
fail. The following is a complete list of
parameters associated with the SLM
functions:
—Sweep Enable
—Oscillator Enable