21-8 PROJ 25 CONV RF OPERATING
MODES
Select the RF operating mode by placing the
cursor in the "RF Control:" field in the RF Zone.
Use the desired softkey to select MONITOR or
GENERATE.
21-8.1 Monitor Mode
The Monitor m
ode (Figure 21-11) provides the
analyzer’s test receiver function which is used in
the testing of radio transmitters. In PROJ 25
CONV Monitor mode, the RF Zone is similar to
the RF Zone in standard mode. It is capable of
setting up the analyzer to monitor RF input
through its antenna or direct connection to the
transmitter.
The RF Zone in Monitor mode contains fields for
choosing the monitor bandwidth, frequency,
attenuation, and source of the Project 25 RF
signal.
The specific entry fields are as follows.
Preset
Refer to Section 21-8.5 Memory Screens
under the General Operation tab in this
manual for information on this field.
B/W
Selects either wide or narrow IF bandwidth of
the unit via softkey selection. Narrow
bandwidth is typically used for Project 25.
Freq
Enter the desired monitor frequency using
keypad or TUNING knob.
Attenuation
Selects the amount of attenuation at the RF
input to the monitor receiver using softkeys.
Selectable input attenuation is useful in
adjusting displays for a wide range of input
levels, as well as for use in high RF field
environments where intermodulation may cause
desensitization of the receiver.
Figure 21-11. Monitor Mode - RF Zone
267
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