Chapter 3 — Quick Start Guide 3-5 Setting the Span
MS272xB + MS8911B UG PN: 10580-00175 Rev. N 3-7
Power Offset Setup for Compensating External Loss
Modes Other Than Spectrum Analyzer
To obtain accurate results, compensate for any external attenuation by using power offset. In
power offset mode, the compensation factor is in dB. (External attenuation can be created by
using an external cable or an external high power attenuator.)
Press the Power Offset submenu key and use the keypad, the arrow keys, or the rotary knob
to enter the desired offset value. When using the rotary knob, the value changes in
increments of 0.1 dB. Using the Left/Right arrow keys changes the value in increments of
1.0 dB. When using the Up/Down arrow keys, the value changes in increments of 10.0 dB.
When using the keypad, enter the new value then press Enter or the dB submenu key to set
the value. The power offset is displayed in the instrument settings summary column on the
left side of the measurement display.
3-5 Setting the Span
Spectrum Analyzer, Interference Analysis, and Power Meter Modes
1. Press the Span main menu key or press the Freq main menu key followed by the Span
submenu key.
2. To select full span, press the Full Span submenu key. Selecting full span overrides any
previously set Start and Stop frequencies.
3. For a single frequency measurement, press the Zero Span submenu key.
3-6 DTV Measurements
Basic setup procedures for Digital Television Analyzer measurements can be found in the
Digital Television Analyzer Measurement Guide. Refer to Appendix A.
Note
Power Meter modes do not have a Zero Span submenu key.
To quickly move the span value up or down, press the Span Up 1-2-5 or
Span Down 1-2-5 submenu keys These keys facilitate a zoom-in, zoom-out
feature in a 1-2-5 sequence.
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