Chapter 3 69
Making EDGE (with GSM) Measurements
Making the Phase and Frequency Error Measurement
Changing the Measurement Setup
NOTE Parameters that are under the Advanced key seldom need to be
changed. Any changes from the default values may result in invalid
measurement data.
Make sure the Phase and Frequency Error measurement is selected
under the
Measure menu. Press the Meas Setup key to access a menu
which allows you to modify the averaging, trigger source, and burst
sync for this measurement (as described in the “Measurement Setup”
section at the beginning of this chapter).
Changing the View
The View/Trace key will allow you to select the desired view of the
measurement from the following:
•
I/Q Error (Quad-View) - See Figure 3-4. Provides a combination view
including:
Window 1: Phase Error
Window 2: Phase Error with Freq
Window 3: RF Envelope
Window 4: Numeric Results + Demodulated bits
Any of these windows can be selected (using the
Next Window key)
and made full size (using the
Zoom key). See Figure 3-5 and
Figure 3-6.
• I/Q Measured Polar Vector - See Figure 3-7. Provides a view of numeric
results and a polar vector graph.
Window 1: Numeric Results
Window 2: Polar Vector Graph
•
Data Bits - See Figure 3-8. Provides a view of the numeric results and
data bits with the sync word (TSC) highlighted.
Table 3-3 Phase and Frequency Error Measurement Defaults
Measurement Parameter Factory Default Condition
Avg Bursts 10 Off
Avg Mode Repeat
Avg Type Maximum
Trig Source RF Burst (Wideband)
Burst Sync Training Sequence
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