Chapter 2 — Instrument Overview 2-13 Firmware Overview
MS272xB + MS8911B UG PN: 10580-00175 Rev. N 2-19
The battery symbol is replaced by a red plug body to indicate that the instrument is running
from external power and is not charging the battery (or to indicate that the battery is not
present). When the external AC adaptor is connected, the battery automatically receives a
charge, and the battery symbol with the lightning bolt is displayed (Figure 2-14). When the
battery is not installed, the red plug body is displayed, as shown in Figure 2-15, and the red
Fault LED will be on. If the battery is installed but has lost communications with the
instrument, then the battery charge indicator will not be shown.
Hold
The Spectrum Master is on hold. To resume sweeping, toggle from Hold to Run in the Sweep
menu.
Single Sweep
Single Sweep is selected. Press Continuous sweep to resume sweeping.
2-13 Firmware Overview
To determine the current Spectrum Analyzer firmware version of your instrument, use the
following procedure:
1. Press the Shift and System (8) keys to display the System menu.
2. Press the Status submenu key.
3. The Spectrum Analyzer firmware is shown in the Status list box as
SPA Version = v#.##, where #.## represents numerals, such as 5.34.
4. Press the Esc key to exit from the Status list box.
Two different Spectrum Analyzer Measurement Guides describe the Spectrum Analyzer
operation. Check the SPA firmware version number, then consult Appendix A, “Additional
Documents” to find the correct Measurement guide for your instrument.
Updating Firmware
For updating instructions, refer to Section 6-6 “Updating Firmware” on page 6-8 and
Section 8-5 “Updating Instrument Firmware” on page 8-2.
Figure 2-15. Battery Not Installed
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