Fluke 5790B - Calibration Adjustment of Wideband Input Flatness

Calibration Adjustment and Verification
Calibration 3
3-33
Calibration Adjustment of Wideband Input Flatness
The wideband source characterization must be done within 30 minutes of
beginning flatness calibration. Before you start, make 8 copies of Table 3-7 with
the 5730A error column filled in (Recorded entries into the 5730A error column
during in the first part of WIDEBAND calibration.)
1. Connect the equipment as shown in Figure 3-13.
5730A Calibrator
WIDEBAND
OUTPUT
ATTE N
10 dB
WIDEBAND
INPUT
5790B
See Table 3-9 for
attenuators required for
each range
elu039.eps
Figure 3-13. WIDEBAND Input Flatness Calibration Test Setup
2. The 5730A will be set to a nominal 3.2 V for all flatness calibration. The
only deviation from the nominal value will be for calibration corrections for
the 5730A and the attenuators.
3. Enter a range voltage at the top of each copy you made of Table 3-8 (7 V,
2.2 V, 700 mV, 220 mV, 70 mV, 22 mV, 7 mV, and 2.2 mV). Also enter
the attenuator corrections as required for each range. Add the total error
for each frequency and enter the result in the TOTAL ERROR column in
each copy. The total error equals the sum of errors of the 5730A and all
attenuators used for that frequency.