1 -5 .
S PECIFICATI ONS , MODE L 852
&
852-01
conti nued
FLAT AMPLITUDE (BUTTERWORTH) RES PONSE
Passband Gain:
Low Pass : 0 dB/20dB, ± 0 . 5 dB .
High Pass: 0 dB/20 d B , ± 0 . 5 dB,
(± 1 dB in
x
10K Multipl ier posi tion);
-
3
dB at approximately 1 MHz .
Band Pass: Depends on separati on of cutoff
frequencies . If separation is more than two
octaves, the Low Pass & High Pass specifi cations
appl y . If Low Pass & High Pass cutoffs are
identi cal , an i nsertion l oss of approx . 6 dB
is produced; the 3 dB bandwidth extends
from 0 . 9 fc to 1 . 1 2 fc and is equal to 0 . 22 f .
Band Reiect: An insertion loss of approximate
l
y
6 dB is produced .
Cutoff Frequency Accuracy:
± 2%
Attenuation at Cutoff:
3 dB
Stopband Attenuation Rate (Rol loff):
48 dB/octave , nominal
Maximum Stopband Attenuation:
90 dB
Stab i l ity of Cutoff Frequency (Typical):
± 200 ppm/oC
Phase Match between Channel s (Typi cal ) : 2° or 2%, whichever is greater
FLA T D E LAY R ESPONSE
Low Pass D e l ay (Typi cal ):
Attenuation at Cutoff:
Stabil ity of Delay (Typical):
Phase Match between Channel s (Typical ) :
INPUT CHARACTE RISTICS
Ci rcuil:
Impedance:
1
seconds
c
Approx . 1 7 dB
2° or 2%, whi chever is greater
Single-ended , diode-protected
1 Megohm shunted by 50 pF i n 0 dB Gai n ,
shunted b y 75 p F i n 2 0 dB Gain
1-7
