Programming A Loopback Bit Error Ratio Measurement; Programming Example; Returned Values - Agilent Technologies 8960 Series Reference Manual
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Programming a Loopback Bit Error Ratio Measurement
This section provides an example of how to make loopback bit error ratio (BER) measurements via GPIB. The
following program example assumes that the mobile station's (UE) antenna output is connected to the RF
IN/OUT connector, and that the mobile station is in loopback mode 1 and is re-transmitting the downlink data
on an uplink signal.
The basic procedure to measure loopback BER is as follows:
1. Set the loopback BER setup parameters as desired for number of bits to test, measurement timeout, and
single triggering, using the SETup:WBERror commands.
2. Use the INITiate:WBERror command to start the measurement.
3. Use the FETCh:WBERror? query to obtain the measurement results.
Programming Example
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OUTPUT 714;"SETup:WBERror:CONTinuous Off"!Set the loopback BER
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OUTPUT 714;"SETup:WBERror:TIMeout 10S"!Set a timeout value of 10 secondS
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OUTPUT 714;"SETup:WBERror:COUNt 12200"!Set the bits to test to 12200.
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OUTPUT 714;"INITiate:WBERror"!Start the measurement.
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OUTPUT 714;"FETCh:WBERror?"!Query the returned integrity indicator and the
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ENTER 714;Integrity,Ber_percent,Bit_errors,Bits_tested !Enter the returned
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IF Integrity<>0 THEN !Integrity <> 0 indicates an
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PRINT "Measurement problem; check for signal level over/under range condition."
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ELSE
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END IF
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END
Returned Values
• Integrity stores the returned integrity indicator value (see
measurement with no errors.
• Ber_percent, Bit_errors, and Bits_tested store the returned values for the bit error ratio (in %), the
number of bit errors measured, and the number of bits tested, respectively.
!and enable timeouts in case the measurement cannot be made.
!average thermal power measurement.
Programming a Loopback Bit Error Ratio Measurement
!measurement to single trigger mode.
invalid measurement.
"Integrity Indicator"
S:\Hp8960\E1963A WCDMA\4.0 release\Reference Guide\Chapters\wcdma_prog_loopber.fm
!values into variables.
); 0 means a successful
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