NARDA IDA, Руководство по эксплуатации, Страница: 101 / 292

6.3 Setting the center frequency (Fcent)
Narda IDA - 3106
93
Changing the rotary control knob function
You can set the following functions for the rotary control knob:
To change the rotary control knob function:

The
Fcent
softkey is displayed.
1.
Press the
Fcent
softkey.
2.
Press the
Rotary Knob
softkey and select the desired function.
6.3.3 Setting Fspan and Fstart / Fstop (Spectrum only)
Spectrum
NOTE:
A frequency range must always be set for
Spectrum
operating mode. This
is set by default by the center frequency and the frequency span. You can
also set the frequency range by defining the start and stop frequencies.
To change the frequency range setting:
1.
Press the
Set Fstart & Fstop
or
Set Fcent & Fspan
softkey until the
desired setting method is displayed.

The labels on the
Fstart / Fstop
and
Fcent / Fspan
softkeys also
change to match the selected setting method.
Table 24: Description of Rotary Knob softkey
Softkey Description
Rotary Knob:
Immediate
(default)
The center frequency is set directly by turning the rotary
control knob.
Rotary Knob:
Preselect
The
Fcent
softkey must be pressed first before you can
change the center frequency using the rotary control knob
and set it by pressing the
OK
key.
This setting is recommended to prevent changing the
center frequency by mistake.
Rotary Knob: TxTbl
This setting is only displayed if a Transmitter Table has
been selected (see Creating and editing Transmitter Tables
on page 82). After you press the
Fcent
softkey, use the
rotary control knob to highlight a transmitter in the table and
press
OK
to select it.