Chapter 9 — Interference Analyzer, Option 25 9-5 Freq (Frequency) Menu
MS20xxA VNA Master UG 10580-00166 Rev. C 9-9
Center Freq
Press the
Freq key followed by the Center Freq soft key and enter the desired frequency
using the keypad, the arrow keys, or the rotary knob. If entering a frequency using the
keypad, then the soft key labels change to
GHz, MHz, kHz, and Hz. Select the appropriate
units key. Selecting the
Enter key has the same affect as the MHz soft key.
Start Freq
Press the
Freq key followed by the Start Freq soft 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, then the stop frequency will be changed to yield a
10 Hz span.
Stop Freq
Press the
Freq key followed by the Stop Freq soft 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, then the start frequency will be changed to yield a
10 Hz span.
Span
The span function is available only in Spectrum view. Press the
Freq key followed by
the
Span soft key and enter the desired span. The Span menu is used to set the
frequency range over which the instrument will sweep. For the VNA Master, the span
can be set from 10 Hz to the maximum frequency of the unit. The span can also be set to
zero.
The soft key shows the current value for span in units of GHz, MHz, kHz, or Hz. When
the
Span button is pressed, span becomes the active parameter and may be changed.
Use the keypad, the directional arrow keys, or the rotary knob to increase or decrease
the span frequency.
Note
When using the up and down arrows, the frequency moves in steps defined by the
value entered using the
Freq Step soft key.
When using the left or right arrow keys, the frequency of the active parameter
moves by 10% of the current frequency span. If the instrument is in zero span,
then the left and right arrows do nothing.
Turning the rotary knob changes the active frequency parameter in increments of
one display point for each click of the knob. In normal mode, the screen display is
551 pixels wide, and in full-screen mode, the screen display is 661 pixels wide.
Choose whichever display is more convenient. Use the Trace menu soft key,
Full
Screen On/Off,
to change the display mode. This feature is available only in
spectrum analyzer mode.
10580-00166C.book Page 9 Thursday, February 21, 2008 12:52 PM
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