How Do I Make a Phase Discontinuity Measurement?

Measuring Non-HSDPA Phase Discontinuity

1. Establish a non-HSDPA RB Test Mode connection between the UE and test set (see How Do I Set Up a Call and Make a Connection? ).
2. Set UL CL Power Control Mode to Active Bits (this is the default setting).
3. Set UE Target Power to the UE's maximum output power (for example, 21 dBm ).
4. Press the Measurement selection key.
5. Select the Phase Discontinuity measurement.
6. Select Phase Discont. Setup ( F1 )
   • Set Trigger Source to Protocol .
   • Set Power Control Pattern to 5DOWN/4UP .
   • Set Number of Pattern Repetitions to 10 .
   • Select Close Menu ( F6 ).
7. Press the START SINGLE key to begin the measurement.
8. Select Graph Control ( F2 ).
9. Select Axis Control ( F1 ) to set the axis control parameters as needed:
   • Start ( F1 ) determines the first slot result displayed.
   • Span ( F2 ) determines the number of timeslots for which results are displayed.
   • Phase Reference ( F3 on Axis Control 1 of 2 ).
   • Phase Range ( F4 on Axis Control 1 of 2 ).
   • Power Ref ( F3 on Axis Control 2 of 2 ).
   • Power Range ( F4 on Axis Control 2 of 2 ).

   Select Return ( F6 ).

10. Select Trace Show/Hide ( F4 ) to choose which of the 3 available traces to display ( Phase Discontinuity , Phase and Power ). Select Close Menu ( F6 ).
11. Select Marker ( F2 ) to turn on the marker on the graphical display and move the highlighted bar in the numerical results display area. Scroll through the numerical data and locate the orange values indicating worst case phase discontinuity and worst case EVM to determine whether the UE has met specifications for this portion of the test.

12. Select Table ( F3 ) to scroll through the 9 columns of numerical results available, as needed.

    A typical result is pictured below:

    
13. Select Return ( F6 ).

14. Repeat steps 7-12 until the UE reaches its minimum output power (for example, -49 dBm). You can easily determine the UE's output power level by noting the UE Target Power level ( F7 on the Call Parms 3 of 3 menu), because at the completion of the measurement, the test set sets MS Target Power to the UE's output power in the final measured slot).

    You may choose to overlap the test subsequences by starting at an MS Target Power that is offset from the ending power level, see Key 3GPP Tests Performed Using the Phase Discontinuity Measurement for more information.

15. Select Phase Discont. Setup ( F1 )
    • Set Power Control Pattern to 5UP/4DOWN .
    • Set Number of Pattern Repetitions to 10 .
    • Select Close Menu ( F6 ).
16. Repeat steps 7-12 until the UE reaches its maximum output power.

Measuring 3GPP TS 34.121 v7.5.0 5.13.1AA Error Vector Magnitude (EVM) and Phase Discontinuity with HS-DPCCH

This section is applicable to the lab application or feature-licensed test application only.

This test is applicable to Release 6 and later HSDPA UEs. For Release 5 HSDPA UEs, see Measuring 3GPP TS 34.121 v7.5.0 s5.13.1A Error Vector Magnitude (EVM) with HS-DPCCH .

Overview:

3GPP TS 34.121 5.13.1AA measures EVM and phase discontinuity at four locations on a defined 12 ms UE power pattern:

The test is performed such that the 12 ms UE power pattern maximum corresponds to the UE's maximum output power as defined in 34.121 Table 5.2A.2. The test is also performed such that the 12 ms UE power pattern maximum corresponds to -18 dBm.

Procedure:

1. Set parameters that can only be set in cell off operating mode (and other parameters that are set from the same menu):
   • Set Operating Mode ( F1 ) to Cell Off .
   • Select 34.121 Preset Call Configurations ( F11 on Call Parms 1 of 3 ) and select 5.2C, 5.7A, 5.13.1A, 5.13.1AA, 5.13.2A with QPSK . You may then skip any steps marked with [34.121 Call Config] in this procedure.
   • Select Channel (UARFCN) Parms ( F12 on Call Parms 1 of 3 ). Set DL Channel ( F7 ) and Uplink Channel ( F8 ) to the appropriate "low range" frequencies for your UE's operating band, as specified by 3GPP TS 34.108 5.1.1 (for example, for operating band II, set DL Channel = 9663 ).
   • [34.121 Call Config] Select Uplink Parameters ( F4 on Call Control 2 of 5 ).
     • [34.121 Call Config] Set Uplink DPCH Bc/Bd Control to Manual .
     • [34.121 Call Config] Set Manual Uplink DPCH Bc to 15 (for 34.121 v7.2.0 Table C.10.1.4 sub-test 3).
     • [34.121 Call Config] Set Manual Uplink DPCH Bd to 8 (for 34.121 v7.2.0 Table C.10.1.4 sub-test 3).
     • [34.121 Call Config] Set Maximum Uplink Transmit Power Level to +21 dBm .
   • Set Operating Mode to Active Cell (pressing the CALL SETUP key quickly brings you back to the top level Call Control menu).
2. [34.121 Call Config] Set Channel Type ( F8 ) to 12.2k RMC + HSDPA .
3. Select HSDPA Parameters ( HSPA Parameters ( F10 ), F10 ).
   • Select HSDPA RB Test Mode Setup ( F8 ).
     • [34.121 Call Config] Set HS-DSCH Configuration Type to FRC (this is the default value).
     • [34.121 Call Config] Set FRC Type to H-Set 1 QPSK (this is the default value).
     • Set CN Domain as needed (by default it is set to PS Domain ). Note, before you can establish a connection in the PS domain, the UE must attach to the test set. To enable this, the PS Domain Information parameter (under Cell Parameters , F12 on Call Control 2 of 5 ) must be set to Present when the UE registers (attaches) with the test set.
   • [34.121 Call Config] Select HSDPA Uplink Parameters ( F11 ).
     • [34.121 Call Config] Set DeltaACK and DeltaNACK to 8 .
     • [34.121 Call Config] Set DeltaCQI to 7 .
     • [34.121 Call Config] Set Ack-Nack Repetition Factor to 1 (this is the default value).
     • [34.121 Call Config] Set CQI Feedback Cycle (k) to 4 ms .
     • [34.121 Call Config] Set CQI Repetition Factor to 1 (this is the default value).
4. Test Application: Select Cell Parameters ( F2 ).
   Lab Application: Select Cell Info ( F2 ) , then Cell Parameters ( F2 ).
   (from the Call Control 2 of 5 menu)
   • [34.121 Call Config] Set Default DPCH Offset (DOFF) to 3 x 512 chips .
   • Set PS Domain Information to Present (this is the default value in the lab application) if you plan to establish the HSDPA connection in the PS domain (i.e. if you've set CN Domain to PS Domain or CS/PS Domain in step 3 above).
   • Qqualmin and Qrxlevmin are fixed to -24 dB and -115 dBm, respectively, in the test application. In the lab application these are the default values for these parameters. They are accessible from Cell Info , Reselection Parameters ( F3 ).
5. [34.121 Call Config] Select Generator Info ( F3 on Call Control 2 of 5 ), select Connected DL Channel Levels ( F4 ), then select HSDPA Conn DL Channel Levels ( F4 ).
   • [34.121 Call Config] Set Cell 1 Connected HSDPA CPICH Level to -10 dB (this is the default value).
   • [34.121 Call Config] Set Cell 1 Connected HSDPA P-CCPCH/SCH Level to -12 dB (this is the default value).
   • [34.121 Call Config] Set Cell 1 Connected HSDPA PICH Level to -15 dB (this is the default value).
   • [34.121 Call Config] Set Cell 1 Connected HSDPA DPCH Level to -9 dB .
   • [34.121 Call Config] Set Cell 1 Sum of Active Conn HS-PDSCH Levels to -3 dB (this is the default value).
   • [34.121 Call Config] Set Cell 1 Connected HS-SCCH 1 Level to -8 dB .
6. Set any other parameters needed to establish a connection with your UE, then power on the UE and wait for it to register (attach). See Establishing an HSDPA Connection .
7. Select Originate Call ( F3 on Call Control 1 of 5 ).
8. Set Cell Power ( F7 on Call Parms 1 of 3 ) to -86 dBm/3.84 MHz .
9. Select UL CL Power Ctrl Parameters ( F8 on Call Parms 3 of 3 ).
   • Set UL CL Power Ctrl Mode to Active bits (this is the default value).
   • [34.121 Call Config] Set UL CL Power Ctrl Algorithm to Two (this is the default value).

10. To perform the test such that the 12 ms UE power pattern maximum corresponds to the UE's maximum output power as defined in 34.121 Table 5.2A.1, set UE Target Power ( F7 on Call Parms 3 of 3 ) to the appropriate value for your UE's power class.

    Required UE Target Power Setting to Achieve Table 34.121 Table 5.2A.2 Maximum Power

    UE Power Class	34.121 v7.5.0 Table C.10.1.4 Sub-Test	UE Target Power setting
    3	3	16.9 dBm
    4	3	13.9 dBm

    For example, for a power class 3 UE, set UE Target Power to 16.9 dBm (the test set rounds this value to 17 dBm). The test set drives the UE's DPCCH+DPDCH level to 17 dBm, which places the UE's DPCCH+DPDCH+HS-DPCCH level at 23.1 dBm, while also appropriately ranging the test set's measurement receiver.

11. Select UL CL Power Ctrl Parameters ( F8 on Call Parms 3 of 3 ). Set UL CL Power Ctrl Mode to Alternating bits .
12. Press the Measurement selection key.
13. Select Phase Discontinuity .
14. Set up the phase discontinuity measurement:
    • Select Phase Discont Setup ( F1 ).
    • Set Trigger Source to HS-DPCCH .
    • Set HS-DPCCH Trigger Subframe Alignment to subframe 0 (this is the default value).
    • Set HS-DPCCH Trigger Slot Alignment to AckNack (this is the default value) .
    • Set HS-DPCCH Trigger Subslot Alignment to 0.0 slot (this is the default value) .
    • Set HS-DPCCH Measurement Step Interval to 0.5 slot (this is the default value) .
    • Set HS-DPCCH Measurement Step Count to 21 (this is the default value) .
    • Select Close Menu ( F6 ).
15. Press the START SINGLE key to begin the measurement.
16. Select Graph Control ( F2 ) and adjust Axis Control ( F1 ) as needed. Note that the Power Ref and Power Range can be adjusted by pressing the More ( 1 of 2 ) key. Select Return ( F6 ).
    Note the following example uses Trace Show/Hide ( F4 ) to hide the Phase trace.
17. Use the Marker ( F2 ) to verify that the measured EVM is less than 17.5% for test points 1, 2, 3 and 4 (marker indices 0, 1, 20 and 21), and that the phase discontinuity across points A and B (marker indices 1 and 21) is less than 36 degrees.
    
18. To perform the test such that the 12 ms UE power pattern maximum corresponds to -18 dBm:
    • Select UL CL Power Ctrl Parameters ( F8 on Call Parms 3 of 3 ). Set UL CL Power Ctrl Mode to Active bits .
    • Set UE Target Power ( F7 on Call Parms 3 of 3 ) to -24.1 dBm (for 34.121 v7.2.0 Table C.10.1.4 sub-test 3). The test set drives the UE's DPCCH+DPDCH level to -24 dBm, which places the UE's DPCCH+DPDCH+HS-DPCCH level at approximately -18 dBm, while also appropriately ranging the test set's measurement receiver.
    • Select UL CL Power Ctrl Parameters ( F8 on Call Parms 3 of 3 ). Set UL CL Power Ctrl Mode to Alternating bits .
    • Repeat steps 15-17.
19. To perform the test for "mid range" and "high range" frequencies:
    • Perform a Physical Channel Reconfiguration (Inter-frequency Hard Handover) to the appropriate UARFCNs.
    • Repeat steps 9-18.

Related Topics

Phase Discontinuity Measurement Description

Phase Discontinuity Troubleshooting

Programming the Phase Discontinuity Measurement

Measuring 3GPP TS 34.121 v7.5.0 s5.13.1A Error Vector Magnitude (EVM) with HS-DPCCH (using the Waveform Quality measurement)