Hioki DT4282 - Page 99

93
Accuracy Table
15
Decibel conversion measurement
Function Range Standard Standard impedance R
dBm 600.00 dBm W
ref
= 1 m [W] 4/8/16/32/50/75/93/110/125/135/
150/200/250/300/500/600
(default)/800/900 /1000/1200
Ω
dBV 60.00 dBV V
ref
= 1 [V] None
Conversion formula (as measured value V (V))








×
=










=
R
1,000V
10log
W
R
V
10log
dBm
2
10
ref
2
10
V
20log
V
V
20log
dBV
10
ref
10
=








=
Accuracy: dBm (when standard impedance is 600
Ω
)
Measurement
Range
[dBm]
20 to
below 45
[Hz]
45 to 65
[Hz]
Over 65
to 1 k
[Hz]
Over 1 k
to 10 k
[Hz]
Over 10 k
to 20 k
[Hz]
Over 20 k
to 100 k
[Hz]
-48 to
below -21
±0.8 dBm ±0.5 dBm ±0.5 dBm ±0.5 dBm ±0.6 dBm ±3.0 dBm
-21 to
below -1
±0.3 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.3 dBm ±1.0 dBm
-1 to below
17
±0.3 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.5 dBm
17 to below
37
Not
specied
±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.5 dBm
37 to below
57
Not
specied
±0.2 dBm ±0.2 dBm ±0.2 dBm
Not
specied
Not
specied
57 to 62 Not
specied
±0.2 dBm ±0.2 dBm ±0.2 dBm
Not
specied
Not
specied
1
2
3
4
5
6
7
Appx. Ind.
HIOKI DT4281A981-08