DeltaOHM HD2010UC/A, Руководство по эксплуатации

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HD2010UC/A
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V4.1
Linearity range
The lower limit of the linearity range, by constant percentage bandwidth, can be taken by the in-
trinsic noise table and adding 7 dB. The upper limits correspond to 141 dB and 131 dB, respec-
tively for input gain equal to 0 dB and 10 dB. The linearity range is almost independent of fre-
quency in the 31.5 Hz … 12.5 kHz interval, and it is shown in the following table according to
the input gain:
Input Gain [dB] Parameter
Lower Limit
[dB]
Upper Limit
[dB]
0
LpA 60
141
LpC 60
LpZ 60
LpkC
68 144
LpkZ
72
10
LpA 50
131
LpC 50
LpZ 50
LpkC
58 134
LpkZ
62
20
LpA 40
121
LpC 40
LpZ 43
LpkC 52 124
LpkZ
55
30
LpA 33
111
LpC 37
LpZ 40
LpkC 50 114
LpkZ 52
40
LpA 31
101
LpC
36
LpZ 40
LpkC 50 104
LpkZ 52
The starting level for the linearity range detection matches the reference level (94 dB) at 1 kHz.
With different frequencies, the starting level takes into account the attenuation of the frequency
weighting being measured. In the secondary fields the starting level is subject to the same incre-
ment of the input gain.
Integration Time
It can be set from a minimum of 1s to a maximum of 99 hours.
Measurement Dynamics with Electromagnetic Fields
Minimum measurable level equal to 60dBA with carrier from 26 MHz to 1 GHz and amplitude
equal to 10V/m modulated 80% at 1 kHz.
Reference Conditions
ƒ The measuring range is that with input gain equal to 10 dB.
ƒ The level corresponds to 94 dB.