Fluke 5820A, Руководство по обслуживанию

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Calibration and Verification
Verification
3
3-35
4. Allow the 5790A reading to stabilize, then record the 5790A’s rms reading for each
voltage listed in Table 3-19.
5. Multiply the rms reading by the conversion factor of 2.8284 to convert it to the peak-
to-peak value.
6. Multiply the peak-to-peak value by (0.5 * (50 + Rload) / Rload), where Rload = the
actual feedthrough termination resistance, to correct for the resistance error.
Compare result to the tolerance column.
Table 3-19. Leveled Sine Wave Amplitude Verification
Calibrator
Mainframe
Output
(@ 50 kHz)
5790A Reading
(V rms)
5790A Reading x
2.8284 (V p-p)
V p-p value x
Correction
Tolerance
(V p-p)
5.0 mV 400
µ
V
7.5 mV 450
µ
V
9.9 mV 498
µ
V
10.0 mV 500
µ
V
25.0 mV 800
µ
V
39.0 mV 1.08 mV
40.0 mV 1.10 mV
70.0 mV 1.70 mV
99.0 mV 2.28 mV
100.0 mV 2.30 mV
250.0 mV 5.30 mV
399.0 mV 8.28 mV
0.4 V 8.3 mV
0.8 V 16.3 mV
1.2 V 24.3 mV
1.3 V 26.3 V
3.4 V 68.3 mV
5.5 V 110.3 mV
3-43. MHz Leveled Sine Wave Flatness Verification
Leveled Sine Wave flatness verification is divided into two frequency bands: 50 kHz to
10 MHz (low frequency) and >10 MHz to 600 MHz (high frequency). The equipment
setups are different for each band. Leveled Sine Wave flatness is measured relative to 50
kHz. This is determined directly in the low frequency band. The high frequency band
requires a “transfer” measurement be made at 10 MHz to calculate a flatness relative to
50 kHz.
3-44. Equipment Setup for Low Frequency Flatness
All low frequency flatness procedures use the following equipment.
•
5790A/03 AC Measurement Standard with Wideband option
•
BNC(f) to Type N(m) adapter
•
N to BNC cable supplied with the Scope Calibrator