Philips PM2521 Operating Manual page 19

dB measurements (valid in function V~ rms)
Range
0 dB reference
Resolution
P
A*-
Number of representation units
Accuracy
Temperature coefficient
Input impedance
Common Mode Rejection Ratio
(CMRR)
AC detector
Crest factor
Response time
Relative reference setting
Maximum input voltages
-57,7 dB . . . +57,7 dB
1 mW in 600
£1
,0,775 V or when selecting the relative
reference function with pushbutton ZERO SET at the
front of the PM 2521
0,1 dB
Measured value less than —57,7 dB is displayed as —99,9 dB
999
Signals
Frequency Accuracy
-31,7 dB ... +47 dB
40 Hz- 20kHz
20kHz - 100kHz
± 0,2 dB
± 1 dB
-50 dB ... -31,7 dB 40 Hz- 20kHz + 2 dB
—57,7 dB ... —50 dB
40 Hz- 20kHz
+ 3 dB
>+47 dB
40 Hz-500 Hz + 1,5 dB
0,02 dB /°C
Signals Impedance
.0 V- 1,8 V 20 Mf2//60 pF
1,8V- 18 V 11 ML2//85 pF
18 V - 600 V 10 ML2//95 pF
100 dB for dc signals
80 dB ac signals 50 Hz or 60 Hz ± 1 %
RMS convertor, ac coupled
2 at range end
3s *
With pushbutton ZERO SET at the front of the PM 2521
In all ranges:
Between Hi and Lo
Between Hi and earth
Between Lo and earth
Maximum dc voltage
Maximum VHz product
600 V rms
1000 V rms
400 V rms
400 V
107