Measuring Code Channel Time/Phase Error

 Last updated: October 28, 2004

 

 General Procedure

 


   
NOTE
Channel power calibration should be performed if the test set is being used for the first time or the operating environment has changed significantly since the last calibration was performed. The channel power calibration also calibrates the Code Channel Time/Phase Error measurement. See Calibrating the Test Set for details.
   
  1.  
  2. Connect the mobile station's antenna output to the test set's front panel RF IN/OUT connector and power them on.
  3.  Press the blue SHIFT key and then the green Preset key to full reset the test set.
  4.  
  5. Establish a call with the mobile station with Radio Configuration ((Fwd3, Rvs3), or above) selected. (see How Do I Set Up an IS-2000 Call? ).
  6.  Initialize the measurement:
    •  
    • Press the Measurement selection key.
    •  Turn the knob to highlight the Code Channel Time/Phase Error measurement and press the knob.
  7.  Press the Code Time/Phase Error Setup ( F1 ) key to access the Code Time/Phase Error Setup menu and set the measurement parameters as needed for your testing situations.

     

    For statistical measurement results, highlight the Multi-Measurement Count parameter and press the ON key (the number of averages will default to 10) or directly enter the value as desired.

       

     


       
    NOTE
    If the Trigger Arm is set to Continuous the measurement began executing as soon as you initialize the measurement in step 4. If single is selected in the Trigger Arm field, press the START SINGLE key to trigger each measurement.
       
 

 Testing 4.3.2 Reverse Pilot Channel to Code Channel Time Tolerance

 Definition: This test measures the permissible error in timing between the radiated Reverse Pilot Channel and the other code channels when operating with Radio Configurations 3 through 6.

 

 Testing 4.3.3 Reverse Pilot Channel to Code Channel Phase Tolerance

 Definition: This test measures the permissible error in RF phase between the radiated Reverse Pilot Channel and the other code channels when operating with Radio Configurations 3 through 6.

 You can perform the above two tests with the following test procedure. It assumes that the mobile station supports Band Class 1 (US PCS) and Radio Configuration 3 or above. Unless otherwise stated, leave all parameter settings to the defaults. For details on performing the steps below, see the General Procedure above.

 


   
NOTE
Both tests can be made only when the call is established with radio configuration ((Fwd3, Rvs3), or above) selected.
   
  1.  
  2. Connect the mobile station's antenna output to the test set's front panel RF IN/OUT connector and power them on.
  3.  Press the blue SHIFT key and then the green Preset key to full reset the test set.
  4.  Establish a call with the following parameter settings (some settings need change as specified for other tests).
    •  
    • Press CALL SETUP to access Call Parms and Call Control menus.
    •  Set Cell Band ( F8 on the Call Parms 1 of 3 ) to US PCS .
    •  Set Radio Config ( F11 on the Call Parms 1 of 3 ) to (Fwd3, Rvs3) .
    •  Select FCH Service Option Setup ( F12 ) (Call Parms 1 of 3) , set Service Option for Fwd3, Rvs3 to SO2 .
    •  Set Cell Power (Î or ) to -55 dBm/1.23 MHz ( F7 on the Call Parms 1 of 3 ).
    •  Press Originate Call ( F3 ) to initiate a call. Verify that the Connected is in the Active Cell status field.
  5.  Press the Measurement selection key, select the Code Channel Time/Phase Error measurement.
  6.  Press the Code Time/Phase Error Setup ( F1 ) key to access the Code Time/Phase Error Setup menu and set the measurement parameters as needed, then press the Close Menu ( F6 ) key.
  7.  Set the Time Limit ( F3 ) to 10 ns, or as needed.
  8.  Set the Phase Limit ( F4 ) to 0.05 rad, or as needed.
  9.  If single is selected in the Trigger Arm field, press the START SINGLE key to trigger each measurement. If the Trigger Arm is set to Continuous , you can skip this step.
  10.  A typical display is shown below. Observe the pass/fail result.
  11.  To display the numeric results for a code channel, press the Marker Position ( F2 ) and turn the knob to position the marker to the bar.
  12.  If desired, after finishing the measurements, turn the measurement off by pressing the Measurement selection key, selecting Code Channel Time/Phase Error , then Close Measurement ( F4 ).
 

Related Topics
 

Code Channel Time/Phase Error Measurement Description

 Programming a Code Channel Time/Phase Measurement

 Code Channel Time/Phase Error Measurement Troubleshooting