Electro-Voice Precision P3000, Руководство по обслуживанию

Страница: 12 / 32

7
DIM 100
< 0.009 % < 0.005 % 3.15 kHz, 15 kHz
11. Frequency Response
vs 21 JUN 94 10:06:59
-21.00
-18.00
-15.00
-12.00
-9.000
-6.000
-3.000
0.0
3.0000
AMPL(dBr)
10 100 1k 10k 100k
FREQ(Hz)
1
2
1
2
Plot 1: HI/LO-Cut on Plot 2: HI/LO-Cut off
12. Noise Interference
- U(F) = external voltage un-weighted with B = 22 Hz … 22 kHz, effective value (IEC 268-1)
- U(G) = noise voltage, frequency-weighting filter according to CCIR-468-3, quasi peak weighted (IEC 268-1)
- U(A) = interference voltage A-weighted, dB(A), effective value (IEC 268-1)
- Signal-to-noise ratio referenced to a nominal output voltage of 69.3 V (1200W/4ohms)
- HI/LO-CUT ON, GND LIFT = GROUNDED, input sensitivity = 0 dBu
Interference
output voltage
S/N ratio Equivalent input
interference
voltage
Equivalent input
interference level Residual
interference
output voltage
U(F) < 615µV > 101 dB < 6.9µV < -101 dBu < 435µV
U(G)
< 3.65mV > 85.5 dB < 41µV < -85.5 dBu < 1.55mV
U(A) < 490µV > 103 dB < 5.5µV < -103 dBu < 345µV
13. Crosstalk
- at f = 1 kHz < -70 dB
14. DAMPING FACTOR - internal >300
- internal with f = 1 kHz
15. SLEW RATE >40 V/µs
- internal
16. Factory Defaults
• Caution: make sure to ckeck these settings:
Function Location Control State Setting
Input Sensitivity L & P 86207/86211 Jumper J11/J21 plugged in 0 dBu
Limiter Off Switch 86207/86211 S102 open Limiter on
Limiter Service 86207/86211 S101 / S201 open
Fan Service 86207/86211 S001 open
Input Routing rear panel slide switch Dual/Stereo Dual Mode
HI/LO-Cut Filter rear panel slide switch on Filter on
Bridged Mode rear panel slide switch Normal Dual Mode
Limiter rear panel slide switch Slow Limiter slow
CIR.GND to Chassis rear panel slide switch Grounded