User Manual

Page 12
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.
enables the type of sweep to be set (repeat or single shot) and the resolution
bandwidth and video filter for the sweep to be selected. When option U01 is fitted, it
also enables sweep triggering.
enables the reference level to be changed, the amplitude units to be changed, and
the vertical scaling to be altered. When option U01 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 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 system utilities. When
option U01 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 section 14 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 1MHz. The highest stop frequency is 2700MHz or 1300MHz. The
minimum span width is 0.27MHz which results in minimum and maximum centre frequencies of
1.135MHz and 2699.865MHz or 1299.865MHz respectively.
Freq/
Span
Sweep/
BW
Level/
Limits
Traces/
Markers
Setup/
Functions
s
Centre
Span
Start/
Stop
Step
Size
Freq
Presets
Freq/
Span