Leveled Sine Wave Flatness Calibration - Fluke 5500A Service Manual

5500A
Service Manual
1. Connect the BNC cable to the Calibrator Mainframe's SCOPE connector. Connect
2. Set the 5790A to AUTORANGE, digital filter mode to FAST, restart fine, and Hi
3. Press the GO ON blue softkey.
4. Press O to activate operating mode on the Calibrator Mainframe.
5. Allow the 5790A rms reading to stabilize. Multiply the 5790A reading by (0.5 * (50
The Calibrator Mainframe will warn when the entered value is out of
bounds. If this warning occurs recheck the setup and calculation and
carefully re-enter the corrected rms reading insuring proper multiplier
(i.e., m, u, n, p). If the warning still occurs, repair may be necessary.
6. Repeat step 5 until the Calibrator Mainframe display indicates that the next steps
5790A
INPUT 1
1000V RMS MAX
SHELL FLOATING
SHUNT
3V RMS MAX
WIDEBAND
7V RMS MAX
SHELL FLOATING
GROUND
10V PK
MAX
Figure 6-20. Connecting the Calibrator Mainframe to the 5790A AC Measurement Standard

6-108. Leveled Sine Wave Flatness Calibration

Leveled Sine Wave flatness calibration is divided into two frequency bands: 50 kHz to
10 MHz (low frequency) and > 10 MHz to 300 MHz (high frequency). The equipment
setups are different for each band. Flatness calibration of the low frequency band is
made relative to 50 kHz. Flatness calibration of the high frequency band is made relative
to 10 MHz.
Leveled Sine Wave flatness is calibrated at multiple amplitudes. Both low and high
frequency bands are calibrated at each amplitude. Calibration begins with the low
frequency band, then the high frequency band for the first amplitude, followed by the
6-82
the other end of the BNC cable to the 50 Ω feedthrough termination then to the
5790A INPUT 2 using the BNC(f) to Double Banana adapter.
Res on.
+ Rload) / Rload), where Rload = the actual feedthrough termination resistance, to
correct for the resistance error. Enter the corrected rms reading via the Calibrator
Mainframe front panel keypad, then press
calibrate Leveled Sine flatness. Press the OPTIONS, then STORE CONSTS blue
softkeys to store the new calibration constants.
AC MEASUREMENT
STANDARD
INPUT 2
1000V RMS MAX
INPUT1 INPUT1 INPUT1 SHUNT INPUT1
VIEW
HI 2.2 mV 22 mV 220 mV 2.2 V 22 V . 220 mV
REF
6 7 8 9 +/- DELETE
7 mV 70 mV 700 mV 7V 70V 700V
LO
4
0 1 2 3 5 CLEAR
10V PEAK
MAX
2.2 mV 1kV
AUTO MAN
ENTER
GUARD
E
Note
5500A CALIBRATOR
NORMAL AUX SCOPE
V, , A, -SENSE, 200V PK
RTD AUX V
MAX
HI
UTIL
SPEC
MENUS
1000V 20V
RMS RMS
MAX MAX
TRIG
LO
OUT
1V PK
MAX
20V PK
MAX
POWER
TC
I
O 20V PK
MAX
.
PREV
STBY
OPR EARTH SCOPE BOOST MENU
µ dBm sec
EDIT
7 8 9 SETUP RESET
m V Hz
FIELD
n W ¡F NEW
4 5 6 CE
k A ¡C
REF
p MEAS TRIG
1 2 3 M F
TC OUT
MULT DIV
/ + 0 • SHIFT ENTER ÷
x
POWER
I
O
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