System Operations 6-7 Application Options Menu (SPA Mode)
MS20xxC UG PN: 10580-00305 Rev. J 6-9
6-7 Application Options Menu (SPA Mode)
This menu is specific to the Spectrum Analyzer application.
Key Sequence: Shift, System (8)>Application Options
6-8 Meas Gain Range Menu (VNA Mode)
Key Sequence: Shift, System (8)>Application Options > Meas Gain Range
SPA mode selected
Impedance
50 Ohm 75 Ohm Other: Press this soft key (submenu key) to toggle the
impedance setting to 50 ohm, 75 ohm, or Other impedance value. Selecting
75 ohm selects the 7.5 dB loss of the Anritsu 12N50-75B adapter. For other
adapters, select Other and enter the appropriate loss value.
Auto Ref Level: Press this soft key (submenu key) to adjust the position of a
signal on the display screen so that it is approximately two divisions down
from the top, if possible. When the key is pressed, the reference level is
adjusted once. Auto Ref Level has no effect on the settings for the
preamplifier or the vertical scaling.
Back: Press this soft key to return to the “System Menu” on page 6-4.
Figure 6-9. Application Options Menu (SPA Mode)
Auto: Press this soft key to set the Measurement Gain Range Mode to Auto.
In this mode, the instrument adjusts the gain automatically to provide the best
overall system performance (dynamic range and high level noise).
Fixed: Press this soft key to set the Measurement Gain Range Mode to
Fixed. In this mode, the gain of the instrument is always set to the low gain
setting. For most applications, Auto mode is recommended. For certain types
of filter measurements (mostly in the range less than 500 MHz), the
instrument may toggle between low gain and high gain modes as the signal
level rises from the noise to the pass band of the filter, resulting in extra ripple.
Setting the Gain Range to Fixed may address that problem.
Back: Press this soft key to return to the “Application Options Menu (VNA
Mode)”.
Figure 6-10. VNA Mode (Measurement Gain Range) Menu
Back
Options
Impedance
50 Ohm 75 Ohm Other
Auto Ref Level
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