Key Sequence: Amplitude
 |
Press this submenu key to set the scale of the Y axis on the measurement display. Scale can be set from 1 dB / div to 15 dB / div. The default value changes from 10 dB / div to 1 dB / div when the Spectral Flatness view is selected.
The Scale/div submenu key only appears when making
EVM vs. Subcarrier and EVM vs. Symbol measurements. All other measurements use the dB/div Scale menu. Power Offset
Press this submenu key to have the instrument automatically adjust for the loss through any external cables, attenuators, or couplers. The power can be offset from – 100 dB to + 100 dB. To set a power offset, press the Power Offset submenu key, use the rotary knob, the arrow keys, or the numeric keypad to enter the offset value, and press the dB submenu key or the Enter key.
Auto Range
When Auto Range is activated, the reference level is automatically adjusted. Press the Auto Range submenu key to switch between On and Off.
Adjust Range
When Auto Range is set to the Off state, press this submenu key to adjust the internal reference level to be optimal, based on the measured signal. The Range adjustment is performed once each time the submenu key is pressed. When Auto Range is set to On, pressing this submenu key causes Auto Range to be set to Off.
Note that when the Adjust Range submenu key had been pressed, the instrument no longer adjusts the internal gain automatically because Auto Range has been set to Off by pressing this Adjust Range submenu key. Press the Auto Range submenu key to toggle the setting to On in order to resume automatic gain ranging.
Y Axis Max
Press this submenu key to set the maximum value of the Y axis. In combination with the Scale control, this allows you to zoom in and zoom out on the Y axis. This control is available only in the Spectral Flatness, EVM versus Symbol, and EVM versus Sub‑carrier views.
|
