STB8827
Series Operation Manual Chapter 7 Command Reference
73
When in the boundary line of the frame, select a smaller value.
The basic measurement accuracy factor A is applicable to test level range of
500mVrms--1.0Vrms. When exceeding this level range, select the value of A
L
according to Table A, the current basic measurement accuracy is obtained by
calculating A
L
A.
Where, V
s
is test signal voltage.
Table A Level correction factor A
L
Test signal voltage Vs (Vrms)
[50m, 5m]
[200m, 50m)
[500m, 200m)
[1 , 500m ) [2 , 1 )
2.5×50mVrms / Vs 2.5
500mVrms / Vs 1 2
Figure B shows the level correction factor A
L
in graphic method according to the
data listed in Table A.
Figure B Level correction factor A
L
curve
Table B Impedance rate factor: K
a
, K
b
Speed Frequency
Ka
Kb
fm
Medium
Slow
1.2kHz
Z
V
f
m
s
m
100
)
200
1
10
)(1
(
3
Z
V
f
m
s
m
100
)
70
(0.3
10
9
)(1
1.2kHz
fm
≤
8kHz
)
200
(
1
10
)(1
Z
V
s
m
3
)
70
(1
10
9
)(1
Z
V
s
m
8kHz
fm
≤
150kHz
)
70
(3
10
9
)(1
Z
V
s
m
