Keysight E6610A, User And Programming Manual

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12 SCPI Command Reference
Keysight E6610A User and Programming Guide 97
24. SOURce1:CPRI:ARB:TMODel TM31-> Set the CPRI playback test model for
the RRH channel 1 to TM 3.1.
25. SOURce1:CPRI:ARB:IQLEVel -15-> Set the CPRI playback IQ level to -15 dB
unit circle full scale.
26. SOURce1:CPRI:ARB:TRIGger 0-> Set RRH’s CPRI playback start at the same
time as the LTE airframe.
27. SOURce1:CPRI:ARB:STATe ON-> Enable the CPRI playback for channel 1.
Set up the CPRI Rx capture of uplink data from the RRH's receiver:
28. SENSe1:CPRI:CAPTure:DEPTh 11-> Set the capture depth for CPRI channel 1
to 11 ms. This allows a little margin for capture of a full 10 ms LTE frame.
29. SENSe1:CPRI:CAPTure:TRIGger 0-> Set the CPRI capture to be triggered at
the start of the airframe.
30. SENSe1:CPRI:CAPTure:TMODel FRCA3-> Select FRC-A3 as the reference
waveform for demodulating the uplink signal from the RRH.
31. SENse1:CPRI:CAPTure:STATe ON-> Enable CPRI captures on channel 1.
Final turn on of all playback and check for any errors:
27. SOURce:PLAYback:STATe ON-> Enable master playback control to start play-
back on all enabled playback channels
28. SYST:ERR?-> Check if any errors have occurred
The E6610A is now ready to make measurements. At this point, the RRH under test
should be configured to transmit RF signals on its antenna port(s) using the downlink
CPRI data being sent to it, and to send its received uplink data back over CPRI so that
the E6610A can capture it. When that is done, use the MEASURE or FETCH
commands to make measurements on the CPRI or RF captured data.
E6610A Measurements
29. INITiate:CAPTure-> Initiate a capture of all enabled capture channels, i.e.
RX1 and CPRI 1
30. MEAS1:AVGP?-> Measure the total received RF power on RF RX1. This will be
the output power that the RRH is transmitting, for the 10 MHz TM 3.1 wave-
form that is being sent to it over CPRI from the E6610A.
31. FETCh1:CHP?-> Now that we have already made a capture of the RF signal
received on RX1 with the INITiate:CAPTure command, we can use the FETCH
command to obtain the carrier power of the 10 MHz TM 3.1 LTE carrier that the
RRH is transmitting, without initiating a new data capture.
32. FETCh1:OBW?-> Obtain the occupied bandwidth of the carrier on RX1, using
the already captured data
33. FETCh1:ACP?-> Fetch the ACP (ACLR) results