Elen Powerfactor3, Руководство по обслуживанию

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POWER SPECIFICATIONS
POWERFACTOR 3 POWERFACTOR 5 POWERFACTOR 7
EIAJ impulse output power
1kHz, THD maximum 1%
Both channels
2 Ohms
4 Ohms
8 Ohms 1500+1500
820+820
450+450
2500+2500
1360+1360
750+750
3500+3500
1910+1910
1050+1050
ELECTRICAL SPECIFICATIONS
INPUT SENSITIVITY
INPUT IMPEDANCE
FREQUENCY RESPONSE
VOLTAGE GAIN +38 dB +40 dB +41 dB
SLEW RATE
DAMPING FACTOR
CROSSTALK
S/N ratio
Harmonic distortion THD
Intermodulation distortion SMPTE
Intermodulation distortion DIM 100
PROTECTIONS
DC offset current protection. When the protection trips the led PROTECT
lights up and the relative channel is muted.
Muting circuit at Power on and off.
High-frequency protections. Two dedicated device, one for each channel,
filters internal VHF signals and external RF interferences outside the audio
range, its activity is indicateted by means of HI-FREQ leds.
Soft Clipping protections. Two clip limiters, one for each channel, prevent
distortions due to excessive input signals.
Their activities are displayed by the VU-Meters:
3) Protected condition: When the temperature exceeds 70˚C all the
channels are muted until safe temperature level is restored, the TEMP led
lights steadily.
Green leds indicate normal running conditions.
First yellow led lights up at -3dB.
Second yellow led lights up at 0dB.
Red Led lights up at +4dB and indicates the interventions of the soft clip
circuit, it must lights up only occasionally.
2) Safety condition: When the temperature reaches 60˚C the protection
circuit gradually reduces the output gain and the TEMP led flashes.
50 V/µs
100Hz = 400, 10kHz = 400
POWERFACTOR SERIES • TECHNICAL SPECIFICATIONS
10 kOhms (balanced)
10÷40000 Hz (-0.5dB)
0dB (0.775Vrms)
power conversion and other dedicated devices are
the circuits used in these high technology amplifiers to
achieve their high performances.
Efficiency
(at any sound level)
95%
DIGAM (DIGital AMplifier) and PWM (Pulse Width
Modulation), "Full Switching" output amplification
stage using a 250KHz sampling rate, new D/A
AMPLIFIER
LOUDSPEAKERS
-90 dB
-100 dB
<0.5% from 0.1W to full power (typical <0.1%)
<0.5% from 0.1W to full power (typical <0.1%)
<0.02% from 0.1W to full power (typical <0.01%)
Short circuit and over current protection for loads < 2ohm. When the
protection trips the led PROTECT lights up and the relative channel is
muted.
Thermal protection with three operating levels:
1) Normal condition: The fan flow air from front to rear slits according with
the temperature level.To ensuring the normal condition the airflow must be
unubstructed from rack, fly-cases or dust.