Chapter 4 — Spectrum Analyzer 4-24 Freq (Frequency)
MS20xxA VNA Master UG 10580-00166 Rev. C 4-35
Center Frequency
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, 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 Frequency
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, the stop frequency will be changed to yield a
10 Hz span.
Stop Frequency
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, the start frequency will be changed to yield a 10 Hz
span.
Span
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 MS2034A, the span can be set from 10 Hz to 4.0 GHz.
- For the MS2036A, the span can be set from 10 Hz to 7.1 GHz.
Span can also be set to zero span for all models.
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. If the span is changed using the
Up/Down arrow keys, the span
changes by the value of the Frequency Step for each key press.
Freq Step
Press the
Freq key followed by the Freq Step soft key to enter the desired frequency step
size. The frequency step specifies the amount by which a frequency will change when
the
Up/Down arrow keys pressed. The center frequency, start frequency, and stop
frequency values can be changed using
Freq Step. The active parameter will be changed
by the frequency step when the Up/Down arrow keys are pressed. If
Freq Step is the
active parameter, nothing happens when the arrow keys are pressed. The frequency
step size can be any value from 1 Hz to 7.1 GHz, 13 GHz, or 20 GHz with a resolution of
1 Hz. Use the keypad or the rotary knob to change the Frequency Step size.
Note
When using the up and down arrows, the frequency moves in steps that are
defined by the value that was 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.
The width across the screen is 551 display points.
10580-00166C.book Page 35 Thursday, February 21, 2008 12:52 PM
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