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5500A
Service Manual
5790A
INPUT 1
1000V RMS MAX
SHELL FLOATING
SHUNT
3V RMS MAX
WIDEBAND
7V RMS MAX
SHELL FLOATING
GROUND
10V PK
MAX
Figure 6-4. Connecting the Calibrator Mainframe to the 5790A AC Measurement Standard
6-38. 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 600 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
low frequency band, then the high frequency band for the second amplitude, and so on,
until the flatness calibration is complete.
Press the OPTIONS and NEXT SECTION blue softkeys until the display reads "Set up
to measure leveled sine flatness".
6-39. Low Frequency Calibration
Connect the Calibrator Mainframe SCOPE connector to the 5790A WIDEBAND input
as described under "Equipment Setup for Low Frequency Flatness".
Follow these steps to calibrate low frequency Leveled Sine Wave flatness for the
amplitude being calibrated.
1. Press the GO ON blue softkey.
2. Establish the 50 kHz reference:
3. Press the GO ON blue softkey.
4. Adjust the amplitude using the Calibrator Mainframe front panel knob until the
5. Repeat steps 1 to 4 until the Calibrator Mainframe display indicates that the
6-24
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
•
Allow the 5790A rms reading to stabilize.
•
Press the 5790A Set Ref blue softkey. (Clear any previous reference by pressing
the 5790A Clear Ref blue softkey prior to setting the new reference if required.)
5790A reference deviation matches the 50 kHz reference within 1000 ppm.
reference frequency is now 10 MHz. Continue with the high frequency calibration.
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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