How Do I Make a Waveform Quality Measurement?

Measuring 3GPP TS 34.121 5.3 Frequency Error

1. Set the downlink and uplink channels:
   • Set Operating Mode ( F1 ) to Cell Off .
   • Set DL Channel ( F10 ) and Uplink Channel ( F11 ) 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 I, DL Channel = 10563 and Uplink Channel = 9613 ).
   • Set Operating Mode to Active Cell .
2. Establish an RB Test Mode connection between the UE and test set (see How Do I Set Up a Call and Make a Connection? ).
3. Ensure that the Connected DL Channel Levels are set to their default values, as required by 3GPP TS 34.121 Tables 5.3 and E.3.1 (select Generator Info , F3 on Call Control 2 of 5 ).
4. Set Cell Power ( F7 ) to -106.7 dBm .
5. Set UE Target Power :
   • Ensure that UL CL Power Ctrl Mode is set to its default value of Active Bits (select UL CL Power Ctrl Parameters , F8 on the Call Parms 3 of 3 menu).
   • Set UE Target Power ( F7 ) to the specified maximum output power for your UE (for example, 21 dBm for power class 4).

   The test set then drives the UE to the specified level, while also appropriately ranging its measurement receiver.

6. Return to the UL CL Power Ctrl Parameters menu ( F8 ) and set UL CL Power Ctrl Mode to All Up bits and ensure that UL CL Power Ctrl Algorithm is set to Two . The test set then drives the UE to transmit at the highest level possible.
7. Press the Measurement selection key.
8. Select Waveform Quality .
9. Select Waveform Quality Setup (F1) and set Trigger Arm to Single .
10. Press the START SINGLE key to begin the measurement.
11. Verify that the measured Frequency Error is less than +/- (0.1 ppm + 10 Hz). For an uplink frequency of 1922.6 MHz, this corresponds to a frequency error requirement of +/- 202.26 Hz.
    
12. Repeat the test for "mid range" and "high range" frequencies (perform a Physical Channel Reconfiguration (Inter-frequency Hard Handover) , then repeat steps 12 and 13).

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

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

This test is applicable to Release 5 UEs only. For Release 6 and later UEs, see Measuring 3GPP TS 34.121 v7.5.0 5.13.1AA Error Vector Magnitude (EVM) and Phase Discontinuity with HS-DPCCH .

Overview:

3GPP TS 34.121 5.13.1A measures EVM 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. You can you use the Dynamic Power Analysis measurement to quickly verify that your UE is transmitting the 12 ms power pattern specified by 5.13.1A. To do so, press the Measurement selection key and select Dynamic Power Analysis , then select Dynamic Power Setup ( F1 ) and select 34.121 5.7A Measurement Configuration , then Yes (or set Steps to 37 , Step Length to 333.3 us , Measurement Interval to 283.3 us , Trigger Source to HS-DPCCH , Trigger Delay to -308.3 us , and HS-DPCCH Trigger Subframe Alignment to subframe 0 ). Press START SINGLE and adjust the Axis Control ( F2 ) as needed.

    

    Once you have verified that your UE is transmitting the proper pattern, you can initiate the Waveform Quality measurement and adjust the Waveform Quality trigger settings to measure each test point:

13. Press the Measurement selection key.
14. Select Waveform Quality .
15. Set up the Waveform Quality measurement:
    • Select Waveform Quality Setup ( F1 ).
    • To measure test point 1, select 34.121 5.13.1A Low of Low-High Transition , then select Yes . You may then skip any steps marked with [34.121 Meas Config] .
    • [34.121 Meas Config] Set Trigger Source to HS-DPCCH .
    • [34.121 Meas Config] Set Transient Period to Exclude .
    • [34.121 Meas Config] Set HS-DPCCH Measurement Interval to 0.5 slot .
    • Set Trigger Arm to Single , if desired.
    • Select Close Menu ( F6 ).
16. If you set Trigger Arm to Single , press the START SINGLE key to begin the measurement.
    

17. Verify that the measured EVM is less than 17.5% for each of the four test points, using the following settings:

    Waveform Quality Settings for the Four Test Points

    		These settings are automatically set by the 34.121 Meas Configs
    Test Point	34.121 Meas Config	HS-DPCCH Trigger Subframe Alignment	HS-DPCCH Trigger Slot Alignment	HS-DPCCH Trigger Subslot Alignment
    1	34.121 5.13.1A Low of Low-High Transition	subframe 5	CQI2	0.5 slot
    2	34.121 5.13.1A High of Low-High Transition	subframe 0	AckNack	0.0 slot
    3	34.121 5.13.1A High of High-Low Transition	subframe 3	AckNack	0.5 slot
    4	34.121 5.13.1A Low of High-Low Transition	subframe 3	CQI1	0.0 slot

18. To perform the test such that the 12 ms UE power pattern minimum 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 12-17.
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

Waveform Quality Measurement Description

Waveform Quality Troubleshooting

Programming a Waveform Quality Measurement

How Do I Make a Dynamic Power Analysis Measurement?

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