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Spectrum Analyzer 2-34 Measure Menu
Spectrum Analyzer MG PN: 10580-00349 Rev. M 2-89
IQ Capture Frequency/Amplitude Menu
Key Sequence:
Shift > Measure
(
4
) key >
IQ Waveform Capture
>
Frequency/Amplitude
Coverage Mapping Menu (Option 431)
Key Sequence:
Shift > Measure
(
4
) key
> Coverage Mapping
This menu is available only when Option 431 is installed on your instrument. Refer to
“Coverage Mapping Menu” on page 6-15 .
Center Freq: Press this 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. With zero offset, this key displays the title
Center Freq . With an offset other than zero, this key displays the title Offset
Center Freq , as shown below the full menu. Refer to
Section 2-27 “Frequency Menu (Freq 1/2) with Offset Function” on page 2-52 .
Span: Lets you set the frequency span to be displayed on the instrument.
This submenu 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 arrow keys, the span changes in a 1-2-5
sequence for each key press.
Reference Level: The reference level is the top graticule line on the display,
and can be set from +30 dBm to –150 dBm. A value may be entered from the
keypad, use the ± key for a minus sign. After entering the value press
the dBm submenu key or the
Enter key. The up or down arrow keys change
the reference level in 10 dB steps, and the left or right arrow keys change the
value by 1 dB. The rotary knob changes the value by 0.1 dB per click. The
reference level value may be modified by the reference level offset value to
compensate for an external attenuator or amplifier.
Scale: The y-axis scale can be set in 1 dB steps from 1 dB per division to
15 dB per division. The value can be changed using the keypad, the rotary
knob or the arrow keys.
Auto Atten: Input attenuation can be either tied to the reference level (On)
or manually selected (Off). When input attenuation is tied to the reference
level, attenuation is increased as higher reference levels are selected to
make sure the instrument input circuits are not saturated by large signals that
are likely to be present when high reference levels are required.
Atten Level: Press this submenu key and use the keypad, the rotary knob or
the arrow keys to change the attenuation value.
Back: Returns to the “IQ Waveform Capture Menu (Option 24)”
on page 2-87 .
Figure 2-76. SPA IQ Capture Freq/Amp Menu
Freq/Amp
Back
Auto Atten
On Off
Center Freq
## GHz
Span
## MHz
Reference Level
##.# dBm
Scale
## dB/div
Atten Lvl
##.# dB
Offset Center Freq
## GHz