Atec Rohde-Schwarz-ESIB Series - Manual (Page 3)

EMI Test Receivers ¸ESIB 3
Pulse weighting using quasi-peak,
peak, average and CISPR-average
detectors; the detectors operate in
parallel and can be switched in as
required
User-selectable transducer factors
for the output of results in the correct
unit; transducer factors for practically
any number of transducers can be
stored on the internal hard disk;
active transducers are powered and
coded via a socket on the ¸ESIB
front panel
User-defi nable limit lines with lin-
ear or logarithmic frequency scale;
limit lines are stored on the internal
hard disk
Time-domain measurements at up
to 50 ns resolution for interference
source analysis ◆
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◆ The excellent characteristics and func-
tions of the ¸ESIB family come into
their own when compliance with rele-
vant EMI standards is to be verifi ed on
the fi nished product. This may involve
limit values for RFI voltage measure-
ments using artifi cial mains networks, for RFI fi eld-strength measurements by
means of test antennas, or for RFI power
measurements with absorbing clamps.
Especially measurements using artifi cial
mains networks and absorbing clamps
put the pulse-handling capability of the
RF input to a severe test. The ¸ESIB
solves this problem by means of a
second, pulse-protected input for the
frequency range from 20 Hz to 1 GHz. In
the case of the ¸ESIB 7, for exam-
ple, this input can handle pulses with
voltages up to 1500 V and powers up
to 30 mWs without any damage being
caused. Pulses generated by artifi cial
mains networks during phase switching
or during RFI power measurements on
ignition cables using absorbing clamps
pose no problem.
The input bandwidth of the frontend is
limited by preselection fi lters to reduce
the total voltage level at the input mixer
to an extent compatible with the wide
dynamic range required for quasi-peak
detection in the CISPR frequency range.
Specifi cations in brief
Frequency range
Input 1: 20 Hz to 7/26.5/40 GHz
Input 2: 20 Hz to 1 GHz
Preselection in receiver mode (fi xed) and analyzer mode (selectable)
Three fi xed-tuned and six or seven tracking fi lters (models .26 and .40)
Preamplifi er with 20 dB gain switch-selectable in conjunction with preselector
Resolution bandwidths
200 Hz, 9 kHz, 120 kHz in accordance with CISPR 16-1-1,
10 Hz to 10 MHz, in decadic steps (6 dB bandwidths,
receiver and analyzer mode)
1 Hz to 10 MHz, adjustable in steps of 1/2/3/5 (3 dB bandwidths,
analyzer mode)
Parallel detectors (max. 4) in receiver mode
Peak, average, CISPR-average, quasi-peak and RMS
Automatic scan
Four storable traces with up to 80 000 measured values each
(250 000 values with one trace)
Internal controller (Windows NT)
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Overview measurement
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