BRUEL & KJAER 1022 Instructions And Applications page 14

The signal-to-noise ratio of the instrument is better than 70 dB for maxi-
mum output voltage. It is independent of the position of the attenuator, but
somewhat dependent on the position of the Output Level potentiometer.
The optimum setting is whEm the voltmeter indicates 20 dB.
The amount of harmonic distortion also depends on the setting of the
Output Level potentiometer. As long as the output is kept within the meter
range the distortion will be of the order indicated in Fig.3.3.
The 1022 can be operated from 100, 115, 127, 150, 220,240 Volts AC
and 50 to 400Hz mains supplies and the maximum power consumption is of
the order of 26 W with full load.
o.J.
~
c
~
0·2
-=
0
; 0·1
..
.:
-;
c
0
z
14
10
"""
"'
t'-.....
............
~
...........
.............__
............__
--
1--
20 30 50
100
2 3 5
1k
___...
1 Watt
7
Load
v
/ l.-/
_......,
~t.10V
-
__,
No load
5
10k
Frequency (Hz) _ , .
11oo'J5
20k
Fig.3.3. Distortion curves for different loads