Rohde & Schwarz Smart Instruments UP300, Руководство по эксплуатации

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R&S UP300/350 Function Test
Operating Manual, 11/2007 3-43 E-1147.2759.00
3.5 Function Test
ATTENTION
The R&S UP300/350 does not contain any parts the operator can repair. Only
properly qualified technicians are allowed to repair the instrument. When
performing service procedures, follow the requirements of VDE 0701.
Function test After the R&S UP300/350 has been switched on ( Ê 3-42), the green LED ON
[2] on the instrument’s front panel comes on. During booting, the "R&S Smart
Instruments" symbol appears on a blue screen background [14]. Booting the
R&S UP300/350 is completed when the waveform and menu bar (
Ê 5-57)
appear.
In error case
If the application display ( Ê 5-57) does not appear and the red, or green LED
flash alternately, switch the R&S UP300/350 off and on. In case the error
continues, return the instrument to our service center for checking.
When the red and green LEDs [2] flash alternately, an internal error has been
recognized. Return the instrument to our service center for checking.
3.6 EMC
EMC
requirements
The R&S UP300/350 meets the EMC Directive 89/336/EEC (applied
standards EN 55011 Class B and EN 61326).
To prevent EMI, the R&S UP300/350 may only be operated with its enclosure
closed. Only appropriately shielded signal and control cables may be used.
External units, such as keyboard, printer or monitor that are to be connected
to the R&S UP300/350, must comply with EMC directives.
Notes on the
R&S UP300/350's
interference In audio engineering, inputs and outputs of test or operating instruments are
usually not referenced to the housing ground, but are rather floating or
balanced (or both). The main reason for this complex circuitry is to separate
hum loops.
The R&S UP300/350 inputs are implemented via BNC connectors; the
reference potential is at the outer conductor. If the input is floating (no
connection to the housing), interference at the input amplifier may occur at
extremely high-frequency RFI field strengths due to demodulation, which can
impair the measurement at low levels. Appropriate grounding measures on
the DUT as well as short line lengths help to reduce interference.
In case of doubt, check the spectrum of the measured signal.