Electric Probe - Rohde&Schwarz HZ-14 Manual Del Usuario

R&S HZ-14
Fig. 5 Gain of preamplifier for magnetic probes (typical)
31.5
30.5
29.5
28.5
Many currents encountered in equipment are impulsive, that is to say that some of the
time the current is very low or even nothing at all, and for very short periods of time it
may rise to a very high value. These, short duration, pulse signals can be very difficult
to measure and, depending on the settings of the measuring equipment, it might not be
immediately apparent that they exist. If they are of sufficiently high level they may
cause malfunction of the measuring equipment, including the preamplifier, and cause
erroneous readings of any low level signals which exist at the same time. Therefore,
care must be taken when making impulsive measurements as very high signal levels
may be present.

2.3 Electric Probe

Unlike the magnetic probes, the electric probe sensing element is a point sensor and is
not affected by probe orientation. The pointed end of this probe makes it easy to
precisely locate sources of radiation.
To achieve a high sensitivity an amplifier is built into the probe tip. Power for this is
provided by the probe power adapter, which contains an acoustic overload warning.
Although the input of the probe amplifier is diode protected, care must always be
exercised not to subject the probe tip to static discharges.
Table 3 Antenna factor for electric probes (typical)
9 kHz to 1 GHz
Operating Manual 1026.7767.12 - 01
32
31
30
29
28
0.001 0.01
67dB [(FV/m)/FV]
0.1 1
Frequency MHz
Operation
10 100 1000
8