ETS-Lindgren HI-4455 Isotropic Field Probe (Archived) - Manual (Page 19)

HI-4455 Isotropic Electric Field Probe
© ETS-LINDGREN L.P. – August 2005
Revision D- Part No. H-600076 19
APPLICATION CONSIDERATIONS
The following subsections contain information designed to help you
maximize the effectiveness of the HI-4455.
Out-of-Band Considerations
Although the HI-4455 is nominally rated for operation from 200 kHz to 40
GHz, it responds to signals both above and below these frequencies.
Any probe response to out-of-band frequencies must be compensated
for when zeroing the probe.
Resolution Limitations
Limitations in probe resolution may result in a non-zero reading when the
receiver is zeroed. If this occurs, it does not necessarily mean either that
there is a problem with the receiver or that your readings are inaccurate.
Receiver linearity is specified as + 0.5 dB full scale: in addition, the
variance of the A/D converter is + 2 least significant bits. When using the
most sensitive range on a given probe, these specifications create the
possibility that, under zero field conditions, the receiver may display a
non-zero value.
Probe Support Structures
It is very important to keep conductive objects away from the HI-4455.
Any such objects in the proximity of the probe may distort the near field
and compromise measurement accuracy. If your application requires
measurements from a fixed position, always mount the probe on a non-
metallic platform, using non-metallic screws.
Archived 4/2/10