Crown Audio IQ-SLM8 - Manual (Page 21)

Page 21
IQ–SLM-8 System and Load Monitoring IQ System Component
Reference Manual
6 Specifications
General
Controls: An 8-segment DIP switch sets the IQ ad-
dress (decimal range: 1–250).
Connectors: Crown Bus: 4-pin male “Euro-style” con-
nector and a mating screw-terminal plug. AUX, gen-
erator and loudspeaker monitor connections: 3-pin
male “Euro-style” connectors and mating screw-termi-
nal plugs. Audio line input and output connectors: #8
screw terminals. Standard 3-pin AC power cord plug
on all US models.
Indicators : An amber Power LED on the front panel is
lit whenever the unit is powered from the AC mains. A
yellow Data LED flashes when data is received from
the Crown Bus, or it may be forced on via software con-
trol to facilitate rapid troubleshooting of Crown Bus wir-
ing. Sixteen two-color LEDs, one per channel for
Impedance Response and one for Frequency Re-
sponse; red indicates fail, green indicates pass, flash-
ing alternately indicates test in progress.
Memory Backup: EEPROM capable of 75,000 typical
writes (10 writes per day for 20 years). 20-year static
retention.
AUX Port: Output: +15 V, 15 mA (max), referenced to
AUX ground; high impedance when switched off. In-
put: logic level > 5 V = high, 20 V max, 10 kilohm input
impedance.
Power Requirements: 0.20 amp draw at 120 VAC, 0.12
amp draw at 230 VAC; 0.25 amp AC fuse (20-mm Euro-
pean-style).
Dimensions: Standard 19-inch (48.3 cm) rack width,
3.5 inches (8.9 cm) high, 16 inches (40.6 cm) deep
behind mounting surface.
Finish: Black powder-coat front panel and baked
screen print.
Crown Bus Data Communication
Protection: If communication is lost, the unit will con-
tinue 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; 12 mA minimum logic high, 4 mA
maximum logic low.
Operation: Half duplex.
Intelligence: 8-bit, 8-MHz, 2-MIPS Motorola 6811 mi-
croprocessor.
Transmission Distance: Variable from 200 to 3,000
feet (61 to 914 m), depending upon wire capacitance.
Typically 1000 feet (305 M) using shielded twisted-pair
wire, #26 AWG or larger. Can be extended with an IQ
Repeater.
Load Monitoring
Maximum Input-to-Output Current: 20 A RMS.
Maximum Input Voltage: 200 V peak.
Maximum Measurements: Current: 200 mA RMS.
Voltage: 7.75 V RMS (+20 dBu). Impedance: 1000
ohms, typical.
Minimum Measurements: Current: 5 mA RMS.
Voltage: 7.75 mV RMS (–40 dBu). Impedance: 1 ohm,
typical.
Measurement Response: Impedance: ±10% at 50 Hz
through 20 kHz at 0 dBu with a nominal 8 ohm load.
Voltage: ±1 dB from 20 Hz through 20 kHz at 0 dBu.
Note: The bandwidth decreases at the minimum and
maximum current and voltage levels.
Test Repeatability: Impedance: Typically better than
3% at midrange of measurable frequency and level
with an 8-ohm load. Voltage: Typically better than 1 dB
at midrange of measurable frequency and level with
an 8-ohm load.
Loudspeaker Monitor: Maximum power: 10 W RMS.
Relays: DPST break-before-make. Fuses: 1 A slow-
blow (20-mm European-style fuse).
Signal Generator
Maximum Output: +10 dBu balanced.
Distortion: Typically less than 0.5%.
Frequency: Adjustable in 1
¤
24
-octave steps from 20 Hz
to 22 kHz.
Level: Adjustable in 1 dB steps from –40 to +10 dBu.
Output Impedance: 100 ohms balanced, AC coupled.