Tektronix SignalScout RFM151 Instruction Manual page 57

Measurement Reference
The 5 channel measurement screen provides a graph and numeric
readout on five preset frequencies. For analog channels, the RF
analyzer measures the peak amplitude of the visual carrier. For
digital channels, average power measurements of the digital carrier
are reported. For off-channel measurements, generic amplitude
measurements are made. The vertical range is 30 dB; 6 divisions at 5
dB per division.
Reference level. This is the level at the top of the screen, and is
displayed in the upper left corner of the screen (REF LVL). The
SignalScout RF analyzer automatically selects the optimum
reference level, based on the five channel level measurements.
Signal frequencies. The five preset names and frequencies are
displayed across the bottom of the screen. These are the frequencies
of the signals being measured, and they can be reprogrammed
through the utility menu or by the press-and-hold method. The auto
presets notation is 'C:'. See page 3-80 for instructions on program-
ming the presets.
SignalScout RFM151 RF Analyzer Instruction Manual 3-9