108 Chapter3
Making EDGE (with GSM) Measurements
Making the EDGE EVM Measurement
• Scale Coupling - Allows you to toggle the scale coupling function
between
On and Off. The default setting is On. This function
automatically determines the scale per division and reference value
by the magnitude of the measurement results.
When either EVM: or Mag Error: window is active in the I/Q Error
(Quad-View) display, the
Amplitude Y Scale key accesses the menu to
allow the following selections:
•
Scale/Div - Allows you to define the vertical scale by changing the
value per division. The range is 0.01 to 3600 degrees. The default
setting is 20.0 degrees per division. However, since the
Scale
Coupling default is set to On, this value is automatically determined
by the measurement results.
• Ref Value - Allows you to set the reference value ranging from 0 to
500%. The default setting is 0%.
• Ref Position - Allows you to set the reference position to either Top,
Ctr (center) or Bot (bottom). For the EVM: graph the, default setting is
Bot. For the Mag Error: graph the default setting is Ctr.
•
Scale Coupling - Allows you to toggle the scale coupling function
between
On and Off. The default setting is On. This function
automatically determines the scale per division and reference value
by the magnitude of the measurement results.
When the Phase Error: window is active in the I/Q Error display, the
Amplitude Y Scale key accesses the menu to allow the following
selections:
•
Scale/Div - Allows you to define the vertical scale by changing the
value per division. The range is 0.01 to 3600 degrees. The default
setting is 20.0 degrees per division. However, since the
Scale
Coupling default is set to On, this value is automatically determined
by the measurement results.
• Ref Value - Allows you to set the reference value ranging from 0 to
500%. The default setting is 0%.
• Ref Position - Allows you to set the reference position to either Top,
Ctr (center) or Bot (bottom). For the EVM graph, the default setting
is
Bot. For the Mag Error graph, the default setting is Ctr.
• Scale Coupling - Allows you to toggle the scale coupling function
between
On and Off. The default setting is On. This function
automatically determines the scale per division and reference value
by the magnitude of the measurement results.