Operating instructions

LOCAL OPERATION
3-15
Return
Returns to the last screen displayed prior to the pressing of the Help/Setup mode key.
Card Setup
A section giving a detailed explanation of memory cards and their use will be found later in this
chapter starting on page 3-94. This key displays the MEMORY CARD FORMAT screen and
menu. The real time clock is also set from this screen.
Return (on the HELP/SETUP screen)
Returns to the last used main mode.
Bar charts
The bar charts used to indicate signal levels can be set to autorange or to user selected ranges. The
current state of each bar chart is shown by either an
A (for Autoranging) or H (for Held range) at
the left of it. The top level screen of Tx TEST, Rx TEST, Dx TEST and AF TEST, all have a
[Scope/Bar] key.
Pressing this key will change the soft keys to those shown below. The function of each key is
explained.
[Barchart Select]
This key will select each visible bar chart in turn. The selected bar chart is
indicated by a highlighted A or H at the left of it.
[Auto range]
This key will set the selected bar chart to autorange. If it is currently set to
autorange, the key will have no effect.
[ D ]
Each press will change the bar chart to the next highest range. If the
selected bar chart is set to autorange, the first press will remove autoranging
and hold the current range. The next press will change the range. When the
highest range is set, subsequent presses will have no effect.
[ C ]
Each press will change the bar chart to the next lowest range. If the selected
bar chart is set to autorange, the first press will remove autoranging and hold
the current range. The next press will change the range. When the lowest
range is set, subsequent presses will have no effect.
[Scope/Bar]
Pressing this key once, will remove the bar charts from the display and cause
the normal oscilloscope to be displayed. Subsequent presses will display the
expanded oscilloscope, then the bar charts again.
[Return]
This key will display the top level screen of the selected test mode.
Spectrum analyzer
The spectrum analyzer (SPEC ANA) mode presents a graphical display of Radio Frequency
against RF level over a selected sweep of the RF spectrum.
Data relating to the setup and to measurements of the signals being analyzed is presented on the
periphery of the display.
As well as the basic spectrum analyzer function, the monitor has a ‘Look and Listen’ function
which allows the operator to listen to the demodulated signal extracted from the RF signal being
examined.
Oscilloscope
The digital oscilloscope function, available from the Tx, Rx and AF test modes, displays signal
waveforms on part of the display screen. The operation of the oscilloscope function is described
in detail later in this chapter under Oscilloscope, starting on page 3-89.
When reference to the oscilloscope facility is necessary when describing other functions, this is
indicated by heading the reference, *
OSCILLOSCOPE*, *STANDARD OSCILLOSCOPE* or
*
EXPANDED OSCILLOSCOPE* as appropriate.