Anritsu Series MS278XB - Manual (Page 107)

Front Panel Menus Menu Archive
MS278XB OM 4-9
Y-Axis Options Menu
The Y-Axis Options menu lets you set the following parameters:
Table 4-6. Y-Axis Options Menu
Scale Type: The Scale Type button is used to toggle the vertical scale type between
Logarithmic or Linear scales. The selected scale type is indicated with a check mark.
This option is not currently available and the Scale Type is fixed to Log.
Units: The Units button lets you select the amplitude units of:
dBm, dBmV, dBµV, W, or V
To change the amplitude units, press the Units button and select the new amplitude units
on the fly-out menu.
Reference Level Offset: Level Offset is used to offset the reference level by the
indicated amount. To change the value, press in the Level Offset parameter field and
enter a new value with the numeric keys. When a new value is entered, the terminator
fly-out will appear with the available units. Press on the desired units to terminate the
entry. Toggle the Level Offset On or Off by pressing the Off/On button below the
parameter field.
Range: +300 dB to –300 dB
Resolution: 0.01 dB
Default: 0 dB
Terminators: dB, Cancel
Mixer Level: The Mixer Level is used to calculate the attenuation value when the
attenuation mode is set to Auto as follows:
Attenuation Level = Reference Level – Mixer Level
+5 dBm is used as a limiting factor for the reference level when the attenuation mode is
set to Manual. The auto attenuation value is constrained to 10 dB to –62 dB. The mixer
level is disabled in the wideband FFT and the VSA modes.
Range: +5 dBm to –50 dBm
Resolution: 1 dB
Default: –10 dBm
The following unit terminators are supported when the appropriate amplitude units are
selected:
dBm, -dBm
dBmV, -dBmV
dBµV, -dBµV
W, mW, µW, nW, pW, fW, aW
V, mV, µV, nV, pV