LAPLACE INSTRUMENTS RF300 Mk II-A, User Manual

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Laplace Instruments Ltd
Page 20
and can be compared directly with the limit lines.
7. ALWAYS check for compression (overload) when taking
measurements. The amplitude of the reading on the screen cannot be
used directly as a guide for compression because the readings have been
adjusted for the RF300 characteristics.
If it is suspected that the signals are too strong even with the attenuator
switched in, install the 10dB attenuator in the input lead to the switch
unit. This additional attenuator can be automatically compensated for in
the software by adjusting the pre-amp settings on the screen.
8. If the background and the product is ‘quiet’, and especially at
frequencies above 20MHz, use 0dB attenuation.
10dB attenuator
Figure 22