25
Level:
set reference level (by turning attenuator on or off); select display units (dBm or dBµV); select
vertical zoom and pan.
Markrs:
set marker(s) on/off and position markers manually or automatically.
Sweep:
select sweep mode (Single, Normal (continuous), Peak Hold or Average), set RBW (resolution
bandwidth).
Traces:
select Live and Reference traces, copy Live to Reference, select Limit Lines, set Video Filter,
choose Hi or Lo resolution.
Stores:
store or recall a trace or a set-up, copy a whole screen to an image file, open the Limit Lines
editor.
System:
set auto sleep mode, set sweep averaging number, turn graticule on or off.
Exit:
exit from the PSAnalyzer application or suspend the application (sleep mode); view information
about the application.
19.3. Mode Menu
(Note that the two keys of the home menu to the right of the Mode key change depending upon the
mode selected).
Centre/Span and Start/Stop
are essentially the same mode, but with different options of control over
the sweep parameters. When the mode is changed the sweep will remain the same and the values of
start and stop or centre and span will be calculated from the existing sweep parameters.
Zero Span
mode disables the sweep and shows a horizontal line representing the level at the centre
frequency. AM or FM audio modulation is selectable with the audio available from a 3.5mm jack socket
( marked
) adjacent to the RF Signal Input. Demodulation mode and audio level are selected from
the AM/FM menu.
Quick Menu
is a different mode of operation which provides direct access to some of the most
commonly used functions without selecting a sub-menu and allocates the navigator keys permanently to
marker control. See section 19.17 for detailed information on Quick Menu operation.
Preset
is used to set a defined set of conditions from a single key press. It is particularly useful when
the frequency location and level of the signal to be measured is unknown. Pressing Preset sets the
following conditions:
Mode = Quick Menu, Frequency span = Minimum to Maximum, Sweep = Normal (and running),
RBW = Maximum, Live Trace = On, Ref Trace = Off, Video Filter = On, Level zoom = Off (10dB/div),
Attenuator = On, Graticule = On, Markers = M1 at centre of frequency span .
19.4. Centre Menu
There are four ways to set the centre frequency:
Step Up/Step Down:
allows the centre frequency to be increased or decreased in fixed steps as set by
the Set Step Value sub menu which is accessed from this menu.
This menu allows the centre frequency of the sweep
to be set. Values are always in MHz with a
maximum resolution of 0.001 (1kHz). The range is
0.310 to 1299.840 MHz or 1.160 to 2699.840 MHz.
The current centre frequency is displayed within the
menu area.
This menu allows the selection of four different modes:
Centre/Span, Start/Stop, Zero Span and Quick Menu.
The current mode is shown within the menu area. To
change mode press the appropriate key after which the
unit returns automatically to the home menu.