b . N o w c o n n e c t c 6 pF c ap a c ito r in series w ith th e in p u t sig na l an d fe ed the
sig n al to th e go ld c o n t a c t on the fro n t end o f2 6 1 9 a n d measure the a tte n u a tio n
o f th e ou t p u t v o lt a g e : M a x . 1 dB
Cha nge th e fre q u e n c y to 1 0 Hz an d ch e c k ite m b . a g a in .
A tte n u a tio n : M a x . 4 dB
1 .4 . F req ue nc y Response
In p u t s ig n a l: 100 m V , 1 k H z co n n e c te d to the In p u t ad a p tor JJ 2 6 1 5.
C h e ck th e fre q u e n c y response in the ra ng e fro m 2 -2 0 0 , 0 00 H z .
a . 28 V DC su pp ly
F re q ue n cy : 3 Hz T o le ra n c e :re . 1 k H z -3 dB
" 1 k H z - 1 5 0 kH z " " ± 2 d B
20 0 k H z " " ± 0 .5 d В
b . 120 V DC sup p ly
F r e q u e n c y : 2 Hz a d ju s ta b le b y R 1 T o lera nc e re . 1 k H z -1 to - 3 dB
" 1 k H z - 1 5 0 k H z + 0 2 d B
200 k H z .1 dB
1 .5 . D is to r tio n
a . 28 V DC sup p ly
F re q ue n c y : 1000 H z . A d ju s t the in p u t v o lta g e fo r 4 V ou tp u t from 26 1 9.
D is t o rt io n : M a x . 4 %
b . 120 V DC su p p ly
M eas u re th e dis to r tio n a g ain b u t a t 32 V o u tp u t v o lt a g e .
D is t o rt io n : M a x . 4 %
1 .6 . N o ise and Hum
28 V DC sup p ly or Screw th e in p u t A d a p to r JJ 26 1 5 on th e p r e a m p lifie r an d c o n n e c t the in p u t o f
120 V D C su pp ly th e J J 261 5 to g ro u n d .
N o is e : L in . 2 0 -4 0 , 0 0 0 H z : 20 p V
C urv e " A " : 4 p V
2619.1
9.71
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