Db Measurements - Philips pm2521 Operating Manual

1 8
2.1.5.
dB measurements (valid in function V- rmsl
R a n g e
- 5 7 , 7 d B . . . + 5 7 , 7 d B
0 d B r e f e r e n c e
1 m W i n 6 0 0 d L , 0 , 7 7 5 V o r w h e n s e l e c t i n g t h e r e l a t i v e
r e f e r e n c e f u n c t i o n w i t h p u s h b u t t o n Z E R O S E T a t t h e
Í r o n t o f t h e P M 2 5 2 1
R e s o l u t i o n 0 . 1 d B
M e a s u r e d v a l u e l e s s ï h a n - 5 7 , 7 d B i s d i s p l a y e d a s - 9 9 , 9 d B
N u m b e r o f r e p r e s e n t a t i o n u n i t s
9 9 9
Accu racy
S i g n a l s Frequency
Accuracy
- 3 1 , 7 d B . . . + 4 7 d B
4 0 H z - 2 0 k H z
2OkHz - 100kHz
r 0,2 dB
t 1
d B
- 5 0 d B . . . - 3 1 , 7 d B
40
Hz- 2OkHz
! 2
d B
- 5 7 . 7 d 8 . . . - 5 0 d B
40
Hz- 2OkHz
! 3
d B
> + 4 7 d B
4 O H z - 5 0 0 H z
r 1 . 5 d B
Tem peratu re coeÍf icient
I n p u t i m p e d a n c e
0 , 0 2 d B / o c
S i g n a l s lmpedance
0 v - 1 , 8 v
20 M0//60 pF
1 , 8 V 1 8 V
1 1 M A / / 8 5 p F
1 8 V - 6 0 0
1 0 M A / / 9 5 p F
C o m m o n M o d e R e j e c t i o n R a t i o
1 0 0 d B f o r d c s i g n a l s
( C M R R )
8 0 d B a c s i g n a l s 5 0 H z o r 6 0 H z + 1 o Á
A C d e t e c t o r
R M S c o n v e r t o r , a c c o u p l e d
: ê s t f a c t o r
2 a t r a n g e e n d
Response time 3s
R e l a t i v e r e f e r e n c e s e t t i n g
W i t h p u s h b u t t o n Z E R O S E T a t t h e f r o n t o f t h e P M 2 5 2 1
M a x i m u m i n p u t v o l t a g e s I n a l l r a n g e s :
B e t w e e n H i a n d L o
6 0 0 V r m s
B e t w e e n H i a n d e a r t h
1 0 0 0 V r m s
Between Lo and earth
400 V rms
M a x i m u m d c v o l t a g e
4 0 0 V
M a x i m u m V H z p r o d u c t
r c 7