SPM-32A ... SPM-36A 4.2 Operation and features
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Normal scale
Scale: 10 dB (dBm) per division
Example: Display of -75 dB (dBm):
Expanded scale
Scale: 1 dB/div.
The expanded scale can be selected or cancelled by
entering the sequence:
The expanded scale is a relative scale and should be
thought of as folding back onto itself. The display increases
or decreases by ±10 dB at -11 dB or +1 dB (hysteresis to
prevent display jitter at 0 or -10 dB). In other words, only the
relevant section of an expanded display is shown.
-120 -100 -80 -60 -40 -20 0 +20
= = = =
.;
= = = =
..
= = = =
..
= = = =
;.
= = = =
..
= = = =
.;
= = = =
.
= = = =
.;
= = = =
..
=
..;....;.
*
EXPAND
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