Interference Analyzer Mode (Option 25)
The Interference Analyzer option provides several different ways to determine the nature
and source of an interfering signal. Selecting
Interference Analyzer from the mode menu
causes the soft keys, described below, to be displayed and the corresponding values shown
in the message area.
FREQ/DIST
q
Center — Sets the frequency at the center of the display. Frequencies can be
entered in units of GHz, MHz, kHz or Hz. When the center frequency is en
-
tered, the labeling below the grid shows the center frequency and the span in
the most appropriate units based on the value.
q
Span — Sets the width of the measurement window in GHz, MHz, kHz or
Hz. The center frequency and span are displayed in the message area at the
bottom of the status window.
q
Start ¾ Enter a start frequency value (in GHz, MHz, kHz or Hz) using the
Up/Down arrow key or keypad, press ENTER to accept, ESCAPE to re
-
store. If the entered start frequency is greater than the current stop frequency,
the stop frequency is automatically adjusted to be the same as the start fre
-
quency (zero span).
q
Stop ¾ Enter a stop frequency value (in GHz, MHz, kHz or Hz) using the
Up/Down arrow key or keypad, press ENTER to accept, ESCAPE to re-
store. If the entered stop frequency is lower than the current start frequency,
the start frequency is automatically adjusted to be the same as the stop fre-
quency (zero span).
q
Signal Standard ¾ Opens a menu of soft keys used to select the signal stan-
dard to be used.
q
Select Standard ¾ Opens the signal standard menu, showing the cur-
rently selected signal standards. Use the soft keys to navigate the list.
Press the
Show All soft key to show the complete signal standard list.
When the complete list is displayed, the currently selected signal stan
-
dards are marked with an asterisk. Press the
Show Selected soft key to
show only the currently selected signal standards.
q
Select Channel ¾ Sets the channel information for the available standard.
If the particular standard has not been used before, the channel number
will default to the lowest legal channel number for that standard. If that
standard has been used before, the last used channel will be the default.
q
Uplink ¾ Selects the bank of frequencies that correspond to signals sent
from the client transmitter to the base station.
q
Downlink ¾ Selects the bank of frequencies that correspond to the signals
sent from the base station to the client receivers.
q
Back ¾ Returns to the previous menu.
AMPLITUDE
Choosing AMPLITUDE causes the soft keys, below, to be displayed and the
corresponding values to be shown in the message area.
q
Ref Level — Activates the amplitude reference level function which sets the
amplitude at the top of the display. Valid reference levels are from +20 to
–120 dBm.
2-46
Chapter 2 Functions and Operations
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