Tektronix SignalScout RFM151 Instruction Manual page 93

Measurement Reference
General Spectrum Mode
The General Spectrum mode provides traditional spectrum analysis
capabilities including multiple markers; maxhold waveform;
multiple detection modes; and center frequency, reference level,
vertical scale, and preamp control. You can use this mode to make
on-screen signal level difference or noise power measurements and
to identify signals that should not be present.
Measurement setup menu. Enter the General Purpose Spectrum
measurement setup menu by pressing the following key sequence:
SPECT--F] (GENERAL PURPOSE)-F5 (MEAS SETUP). The
measurement setup menu allows you to control the marker mode
(DUAL. OFF , or NOISE). preamp (OFF or ON), detection mode
(PEAK or AVG), and noise marker bandwidth.
Options in this menu are selected by pressing the function key
associated with the parameter and using the knob to select the option
desired. An arrow cursor to the left of the screen indicates which
parameter is being edited, Use the knob or the keypad to specify the
noise marker bandwidth. Press ESC to accept entries and exit the
The marker mode parameter allows you to choose between the
following marker modes:
@ Dual markers (DUAL, the default mode) allows you to make
amplitude measurements at the marker frequencies and
difference measurements.
@ No markers (OFF) allows you to increase the range of swept
window frequencies to 10 horizontal divisions rather than eight
and removes the on-screen markers and the marker readouts.
@ Noise markers (NOISE) allows you to make noise power
measurements. It is identical to the dual operation mode except
the markers are normalized to the bandwidth you specify in the
When noise markers are enabled, if the noise level being measured is
too close to the noise floor of the RF analyzer to make an accurate
measurement, the "near noise" indicator (>) is displayed to the left
of the marker amplitude readout.
SignalScout RFM151 RF Analyzer Instruction Manual 3-45