Specifications - Crown IQ–P.I.P.–SLM Reference Manual

6 Specifications

General
Internal Controls: An 8-segment DIP switch is used to
set the IQ address (decimal range: 1–250). A Reset
switch, accessible with a straightened paper clip
through the P.I.P. panel, resets all settings (except the
amplifier initialization data) to the "user defaults" if it is
pressed for less than 2 seconds or the factory defaults
if it is pressed for more than 2 seconds.
Connectors: Crown Bus Input/Output: A 4-pin
removable Eurostyle barrier block connector; a mating
plug is shipped with the product. Audio Input: A 3-pin
removable Eurostyle barrier block connector for each
channel; mating plugs are shipped with the product.
AUX: A 3-pin removable Eurostyle barrier block
connector; a mating plug is shipped the with product.
Indicators: A yellow DATA LED flashes when a valid
IQ command is received from the IQ System via the
Crown Bus. Depending upon the firmware version in
your unit, the DATA indicator can be forced on to facili-
tate rapid troubleshooting of Crown Bus wiring.
Auxiliary Feature: +15 VDC is supplied across pins 1
(ground) and 3 (+) of the AUX connector when turned
on by the IQ System software.
Power Requirements: When installed into a Crown
P.I.P. -compatible amplifier, the unit receives ±24 VDC.
Crown Bus Data Communication
Protection: If communication is lost, the unit will
continue to function with the last commands received.
Data Rate: 38.4 K BAUD.
Data Format: Serial, binary, asynchronous; 1 start bit;
1 stop bit; 8 data bits; no parity.
Crown Bus Interface Type: Optically isolated 20
milliamp serial loop.
Operation: Half duplex.
Intelligence: 8-bit microprocessor with 12 K byte
control program.
Transmission Distance: Variable from 200 to 3,000
feet (61 to 914 m), depending upon wire capacitance.
Typically 1,000 feet (305 m) using shielded twisted-pair
wire, #26 AWG or larger. Can be extended with an IQ
Repeater.
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IQ–P.I.P.–SLM Programmable Input Processor with Load Monitoring for IQ Systems
Load Monitor
Impedance Measurement Capabilities: 50 ohms,
±–5% from 20 Hz to 22 kHz.
Generator Frequency Range: 20 Hz to 22 kHz.
Frequency Resolution:
or 1-octave spacing.
Generator Amplitude: Adjustable from +10 dBu to
–40 dBu.
Generator Total Harmonic Distortion (THD): <1%.
Audio
Please note: The audio specifications are referenced
to 0.775 V (0 dBu). Measurements were made at the
output of the IQ–P.I.P.–SLM module, itself.
Input Impedance: Nominally 20 K ohms balanced and
10 K ohms unbalanced.
Maximum Input Level: +25 dBu, peak.
Gain: Adjustable from 0 to –80 dB in 0.5-dB steps.
Muting: >100 dB.
Output: Unbalanced to amplifier via PIP2 ribbon
cables.
Maximum Output Level: +25 dBu, peak.
Output Noise: <–90 dBu from 20 Hz to 22 kHz.
Signal-to-Noise Ratio: >90 dB from 20 Hz to 20 kHz.
Frequency Response: ±0.25 dB from 20 Hz to 20
kHz.
Crosstalk: <–80 dB from 20 Hz to 22 kHz.
Common Mode Rejection (CMR): >50 dB at 60 Hz.
Total Harmonic Distortion (THD): <0.1% at 10 kHz,
+12 dBu input.
IQ System Data Acquisition
Input/Output Monitor Accuracy: Typically ±1 dB, ±2
dB maximum.
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