BRUEL & KJAER 1024 - Compressor Functionality Tests; Compressor Balance Adjustment; Frequency Response of Compressor; Gain Reserve Measurement

BROEl & KJA:R
NC2rum - Denmark
4.1. Compre ssor Balance
ATTENUATOR: "1200 mV"
MATCHING IMP .: "Alt."
COMPRESSOR SPEED: "1000 dB / sec."
SWITCH 07: "Scanning Off"
BANDWIDTH SELECTOR: "S;ne"
METER SW1TCH: "0.3 sec. Output Vo lt."
fREQUENCY SCALE: "1000 Hz"
COMPRESSOR VO LT. , "10"
4.2 . Frequency Response
ATTENUATOR: "12000 mV"
MATCHING IMP.: "Alt. "
COMPRESSOR SPEED : "100 dB /s ec."
SW ITCH 07: "Scan ning Off"
BANDWIDTH SELEC T OR: "S;ne"
METER SWITC H: "0.3 see. Output Volt."
FREQUENCY SCALE: "1000 Hz"
OUTPUT LE V EL: "10"
4.3 . Go:" Reserve
COMPRESSOR SPEED: "3 dB / sec."
SWITCH 07: "Scanning Off"
BANDWIDTH SELECTOR: "S;ne"
METER SW ITCH : "0 .3 sec. Output Volt."
FREQUENCY SCALE: "1000 Hz"
b. COMPRESSOR SPEED to "Comp . OfP'
4.4. Compression
MATCHING IMP .: "6000 n"
COMPRESSOR SPEED: "100 dB /sec."
SWITCH 07: "Scanning Off"
BANDWIDTH SELECTOR: "S;ne"
METER SW1TCH: "0.3 sec. Output Volt."
FREQUENCY SCALE: "1000 Hz"
OUTPUT LEVEL: "10"
1024
.4 - 1.65
Compre~sor
1024.4
valid f rom seriol no. 131481
Adjust the OUTPUT LE VE L for a 0 .5 V dellecHon on type 1024.
Check that the signa l of the anodes of V 14 are equo t •
If necessary adjust P 6.
Adjust COMPRESSOR VO LTA GE for 0 20 dB deflecHon on type 1024.
V ar y the frequenc y from 20 - 20000 Hz.
Defl ect ;on on type 1024: 19 .5 - 20.5 dB
Adjust the OUTPUT LE V EL for a 20 dB dellecl;on on type 1024.
COMPRESSOR INPUT d;sconnected.
DelleeHon on type 1024: 10 -12 dB.
Adjust COMPRESSOR VOLTAGE for on 18 dB dellecHon on type 2107
(100 V ronge)
Increa se the go;n of type 2107 by 40 dB, (1 V range).
Ntax. change of deflection on type 2107: 1.5 dB .