Fluke 5790A, Operator'S Manual

Page: 18 / 220

5790A
Operators Manual
1-4
3. Applies correction factors saved at time of calibration.
4. Presents the results of the ac-dc transfer on the Measurement Display, showing rms
amplitude and frequency of the signal being applied, accurate to within the
uncertainty of the internal dc standard combined with the transfer uncertainty. (See
the Specifications.)
Pressing a softkey (a key whose function is defined on the Control Display) sets an
incoming signal as a reference, activating transfer mode. In transfer mode, the 5790A
automatically does the following:
1.
Displays the reference source, the formula it is using to compute ac-dc or ac-ac
difference, and the results of the formula.
2. Provides you with a softkey to easily correct for dc reversal error. You apply both
polarities of dc and the 5790A computes the average of the absolute values of the
applied dc.
3. Continuously shows the results of comparisons of the heating effect of the incoming
signal to that of the stored reference.
4. Applies correction factors saved at time of calibration as necessary.
5. Presents the results of the transfer on the Control Display, accurate to within the
uncertainty of the transfer device. (See the Specifications.)
6. Always displays the measured amplitude and frequency of the input signal on the
Measurement Display, no matter what other processes are taking place.
1-4. An Overview of the Features
See Section 3 for detailed descriptions of front panel connectors, controls, and displays.
Features of the 5790A include the following:
•
Two main input choices: 50
Ω
Type "N" coaxial or five-way binding posts
•
A dedicated SHUNT input terminal that provides current transfer capability.
•
WIDEBAND 50
Ω
Type "N" coaxial connector for measuring signals up to 30 MHz.
(Requires Option 5790A-03 Wideband Module.)
•
Closed-case periodic calibration in which no physical adjustments are necessary.
•
The ability to print or upload calibration reports. For reporting purposes, the 5790A
maintains in nonvolatile memory a database of the calibration shifts from the
previous calibration as well as from the most recent calibration. Calibration reports
provide a way to develop a performance history of each 5790A.
•
Real-time clock for date and time stamping reports, recording the time and date of
calibration, and calculating specifications.
•
Standard IEEE-488 (GPIB) interface, complying with ANSI/IEEE Standards 488.1-
1987 and 488.2-1987.
•
EIA Standard RS-232-C serial data interface for printing, displaying, or transferring
internally stored calibration constants, and for remote control of the 5790A.
•
Extensive internal software-controlled self testing and diagnostics of analog and
digital functions.