Tektronix SignalScout RFM151 Instruction Manual page 89

Measurement Reference
Vertical resolution. The vertical resolution for the spectrum displays
can be set to either 2, 5, 10, or 15 dB/division. Adjust this display
setting by pressing F1 until the on-screen display reads VERT. Then
use the knob to adjust the dB/div scale. The vertical resolution
readout is displayed just above the trace in the upper right-hand
corner of the screen.
Reference level. 'The reference level is the level at the top of the
screen. The present setting is displayed in the upper left corner of the
screen. The reference level can be changed by pressing FI until the
on-screen label reads REPLVL and then turning the knob. Adjusting
the reference level moves the trace vertically on the screen,
Resolution bandwidth. Resolution bandwidth in all spectrum modes is
adjusted automatically depending on the span/div selected.
'Table 3--13 indicates the relationship between the two parameters.
Table 3-13: Span/division and resolution bandwidth
Span per division Resolution bandwidth
200 kHz 30 kHz
400 kHz 30 kHz
1 MHz 300 kHz
2MHz 300 kHz ~
4 MHz 300 KHz
Markers. The general spectrum mode provides three marker modes:
OFF, DUAL, or NOISE, The current mode is indicated just above the
marker readouts to the left of the screen. In the general purpose
spectrum mode, specify which marker mode you want to use in the
measurement setup menu (press F5 from the general purpose
spectrum display). The ingress mode does not use markers and the
demodulation mode uses only dual markers.
Marker one is represented as a solid vertical line; marker two is
represented as a dashed line. The marker readouts (frequency,
amplitude, and difference) are displayed to the left of the trace.
SignalScout RFM151 RF Analyzer Instruction Manual 3~41