Hioki IM7580, Инструкция по эксплуатации

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284
Measurement Accuracy
Zsr: Power = between -7 dBm and +7 dBm
FAST MED SLOW SLOW2
13.5 9 5.1 3.9
Zsr: Power = between -40 dBm and -7.1 dBm
Zsr
Zoff
FAST MED SLOW SLOW2
3 × 10
(-0.048P + Zoff)
0.35 0.2 0 -0.15
P: Power setting value [dBm]
Yo
Yor F
=
+ + ×
( )
30 0 15
1000000
.
[S] F: Measurement frequency [MHz]
Yor: Power = between -7 dBm and +7 dBm
FAST MED SLOW SLOW2
7.5 5.7 3.3 2.4
Yor: Power = between -40 dBm and -7.1 dBm
Yor
Yoff
FAST MED SLOW SLOW2
3 × 10
(-0.046P + Yoff)
0.1 0 -0.2 -0.4
P: Power setting value [dBm]
12.2.2 Example: Calculation of Accuracy
Impedance, accuracy for Z = 50
Ω
Example: Measurement frequency = 50 kHz, measurement signal level = -10 dBm, measurement
speed = SLOW2
1
Obtain Ea.
From measurement conditions and accuracy specification:
Er = 3
×
10
(-0.046P + Eoff)
P = -10
(measurement signal level [dBm])
Eoff = -2.3
With the above, Ea is calculated as follows:
Ea = 0.5 + Er = 0.5 + 3 × 10
(-0.046 × (-10)-2.3)
= 0.543
2
Obtain Zs.
From measurement conditions and accuracy specification:
Zsr = 3 × 10
(-0.048P + Zoff)
P = -10
(measurement signal level [dBm])
Zoff = -0.15
F = 50
(measurement frequency [MHz])