This procedure assumes that the BCH parameter for Cell Band is set up correctly for your mobile station and that the appropriate RF IN/OUT Amplitude Offsets have been set to offset loss between the mobile station and the test set. For more details see How Do I Configure the Test Set for My Test System? .
Turn the mobile on and wait for
field located in the bottom center of the screen. Note: For mobiles that don't perform a GPRS attach automatically, set the mobile to data mode.
Start Data Connection( F3 ) key and watch for the
Active Cellfield changing to
Phase & Frequency Errormeasurement.
Phase & Freq. Setup( F1 ) key.
Measurement Timeout = 10 s
Change View( F2 ) key.
Graph( F2 ) key to access the peak phase error graph.
A typical peak phase error graph is shown above. The bottom section of the graph displays the binary representation of the demodulated bits from the burst the measurement was made on, normal symbols are shown in white, midable symbols in yellow, midamble symbols in error in red and tail symbols in dark cyan (the midamble symbols and tail symbols are not shown in above picture due to some reasons, but actually you can see in the test set)
The marker can be turned on by pressing the
) key then the
) key. Set the required marker position using the knob or the numeric entry keys. In addition, the axis values can be changed by pressing the
) key. This allows you to zoom in or out to look at particular sections of the graph in more detail.
A typical peak phase error graph is shown above. This graph is zoomed in to show bits ranging from 100.0 to 120.0 at a 1.0 degrees per division setting. The Y-axis reference point is changed to 5.0 degrees.
If you require details on how to navigate through the phase and frequency error graph menus, see Phase and Frequency Error Graph Menus .