Inhaltsverzeichnis
Werbung
Verfügbare Sprachen
Verfügbare Sprachen
Anhang
44
General Information Regarding the CE Marking
ROHDE & SCHWARZ measuring instruments comply with
regulations of the EMC Directive. ROHDE & SCHWARZ is
basing the conformity assessment on prevailing generic
and product standards. In cases with potentially different
thresholds, ROHDE & SCHWARZ instruments apply more
rigorous test conditions. Thresholds for business and com-
mercial sectors as well as small business are applicable
for interference emission (class 1B). As to the interference
immunity, the standard thresholds for the industrial sec-
tor apply. Measurement and data lines connected to the
measuring instrument significantly affect compliance with
specified thresholds. Depending on the respective appli-
cation, utilized lines may differ. In regards to interference
emission and immunity during measurements, it is critical
that the following terms and conditions are observed:
1. Data Cables
It is imperative to only use properly shielded cables when
connecting measuring instruments and interfaces to ex-
ternal devices (printers, computers, etc.). Unless the man-
ual prescribes an even shorter maximum cable length,
data cables (input/output, signal/control) may not exceed
a length of 3m and may not be used outside of buildings.
If the instrument interface includes multiple ports for inter-
face cables, only one cable at a time may be connected.
Generally, interconnections require double-shielded con-
necting cables. The double-shielded cable HZ72 (available
at ROHDE & SCHWARZ) is well suitable as IEEE bus cable.
2. Signal Cables
In general, measuring cables for the transmission of sig-
nals between measuring point and measuring instrument
should be kept as short as possible. Unless the manual
prescribes an even shorter maximum cable length, sig-
nal cables (input/output, signal/control) may not exceed a
length of 1m and may not be used outside of buil-dings.
In general, all signal cables must be used as shielded con-
ductors (coaxial cable- RG58/U). It is important to ensure
proper ground connection. Signal generators require the
use of double-shielded coaxial cables (RG223/U, RG214/U).
3. Impact on Instruments
General remarks regarding the CE marking
If strong high-frequency electric and magnetic fields are
present, it may occur despite diligent measurement setup
that unwanted signal units are injected into the instru-
ment via connected cables and lines. This does not result
in destruction or shutdown of ROHDE & SCHWARZ instru-
ments. In individual cases, external circumstances may
cause minor variations in the display and measuring values
beyond the selected specifications.
Werbung
Kapitel
Inhaltsverzeichnis
