Anritsu Spectrum Master MS2720T, Руководство пользователя

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Interference Analyzer (Option 25) 3-11 Frequency Menu with Offset Function
Spectrum Analyzer MG PN: 10580-00349 Rev. H 3-33
3-11 Frequency Menu with Offset Function
Key Sequence:
Freq
The tuning frequency range can be entered in several different ways depending upon what
makes the most sense for the user or for the application. The center frequency and span can
be specified, the start and stop frequencies can be entered, or a signal standard and channel
number can be selected from the built-in list. A user defined frequency offset, either positive
or negative, can be entered to adjust the frequency that is displayed on the instrument from
the actual swept frequency. When enabled,
Offset
will be displayed at the bottom of the screen
( Figure 3-28 ) and the
Center Freq
,
Start Freq
, and
Stop Freq
keys will indicate that a
frequency offset has been turned on. Set the
Freq Offset
to
0 Hz
to remove the frequency
offset.
Note
The Freq Offset will affect the displayed values of Frequencies, Markers and
Limits. The current frequency offset value is displayed in the
“Freq 2/2 Menu” .
Offset Center Freq : Press the Freq main menu key followed by the Offset
Center Freq submenu key and enter the desired frequency using the keypad,
the arrow keys, or the rotary knob. If entering a frequency using the keypad,
the submenu key labels change to GHz, MHz, kHz, and Hz. Press the
appropriate units key. Pressing the
Enter key has the same effect as the MHz
submenu key.
Offset Start Freq: Press the Freq main menu key followed by the
Offset Start Freq submenu key and enter the desired frequency using the
keypad, the arrow keys, or the rotary knob. If a start frequency higher than the
current stop frequency is entered, the stop frequency will be changed to yield
a 10 Hz span.
Offset Stop Freq: Press the Freq main menu key followed by the
Offset Stop Freq submenu key and enter the desired frequency using the
keypad, the arrow keys, or the rotary knob. If a stop frequency lower than the
current start frequency is entered, the start frequency will be changed to yield
a 10 Hz span.
Span: Press the Freq main menu key followed by the Span submenu key
and enter the desired span. See “Span Menu” on page 3-36 .
Signal Standard: Use the up or down arrow keys or the rotary knob to
highlight a signal standard and press Enter to select.
When a signal standard is selected, the center frequency and span for the
first channel of the last segment of the particular standard is automatically
tuned. Other settings, such as channel spacing and integration bandwidth,
are also automatically entered.
Channel #: Use the up or down arrow keys, the keypad, or the rotary knob to
select a channel number for the selected signal standard. The center of the
channel is tuned to the center of the spectrum analyzer display. The
frequency value is the amount by which the center frequency differs from the
center of the channel.
Step Size & Offset: Opens the “Freq 2/2 Menu” on page 3-34 .
Figure 3-26. IA Freq 1/2 with Offset Function Menu
Freq 1/2
Offset Center Freq
1.930 500 GHz
Offset Start Freq
1.830 500 GHz
Offset Stop Freq
2.030 500 GHz
Channel
- -
Signal
Standard
Span
Step Size &
Offset
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