Instructions

Page 14
4 Operation using the Menu System
The default menu system for the spectrum analyzer consists of three rows of five keys. The
upper row represents the top level of the menu system and defines five “menu groups” as
follows:
enables the frequency range of sweep to be set in terms of start and stop
frequencies or centre frequency plus span, as well as zero span demodulation.
enables control of the sweep and bandwidth filtering for the sweep. Controls are
provided for RBW and VBW settings, sweep mode, sweep time, sweep control and
detector type selection. When option U02 is fitted, it also controls sweep triggering.
enables the reference level to be changed, the amplitude units to be changed, and
the vertical scaling to be altered. When option U02 is fitted, it also enables the
setup and control of limit lines and patterns, and the application of external offsets
and compensation tables.
provides control of the display traces including trace processing modes, along with
the storage function for both traces and screen images. Also provides setup and
control of the measurement markers.
provides access to the storage of instrument setups and access to system utilities
and setting of the frequency counter gate time. When option U02 is fitted, it also
provides access to automatic logging functions.
Each group has up to five “sub-groups” which appear on the middle row of keys. The currently
selected group and sub-group is shown by the relevant key being dark blue.
The bottom row of keys represent the “functions” that can be performed for each of the many
sub-groups. These keys may perform an immediate action, or bring up a pop-up menu, or
create a special control screen for numeric entry or file operations.
See Appendix D,section 19, for a graphical summary of the menu tree.
4.1 Setting the Frequency Range of the Sweep
This menu group controls the frequency range for the current sweep of the spectrum analyzer.
The range can be set in terms of either a centre frequency plus a span width, or in terms of a
start frequency and a stop frequency.
Pressing Centre or Span will cause the frequency range to be displayed at the top of the screen
in terms of a centre frequency and a span. Pressing Start/Stop will cause it to be displayed in
terms of a start frequency and a stop frequency.
The lowest start frequency is 10MHz. The highest stop frequency is 6000MHz or 3600MHz.
The minimum span width is 0.027MHz which results in minimum and maximum centre
frequencies of 10.0135MHz and 5999.9865MHz or 3599.9865MHz respectively.
Freq/
Span
Sweep/
BW
Level/
Limits
Traces/
Markers
Setup/
Functions
Centre
Span
Start/
Stop
Step
Size
Freq
Presets
Freq/
Span