Programming A Fast Bit Error Measurement; Program Example - Agilent Technologies 8960 10 Series Reference Manual

Programming a Fast Bit Error Measurement

This section provides an example of how to make the fast bit error (FBER) measurement via GPIB.
The following procedure assumes that an active link is established between the test set and the mobile station.
See "Establishing an Active Link with the Mobile Station" on page
1. Set the cell power to a good level.
2. Configure FBER measurement parameters using the SETup subsystem.
3. Set the cell power to a low level for a FBER measurement.
4. Start the FBER measurement using the INITiate subsystem.
5. Use the INITiate:DONE? command to find out if the FBER measurement results are available.
6. Use the FETCh? command to obtain FBER measurement results.
7. Set the cell power to a good level.

Program Example

10 OUTPUT 714;"SETUP:FBERROR:TIMEOUT:TIME 5" ! BER measurement times out after
20
30 OUTPUT 714;"CALL:CELL:POWER:AMPLITUDE -85 DBM" ! Sets the cell power level to
40
50 OUTPUT 714;"SETUP:FBERROR:CONTINUOUS OFF" ! Configures a BER measurement to
60
70 OUTPUT 714;"SETUP:FBERROR:COUNT 10000" ! Sets the number of bits to measure
80
90 OUTPUT 714;"SETUP:FBERROR:CLSDELAY:STIME 500 MS" ! Sets the Close Loop Delay
100
110 OUTPUT 714;"SETUP:FBERROR:SLCONTROL ON" ! Sets the Signal Loop Control state to on.
120 OUTPUT 714;"SETUP:FBERROR:LDCONTROL:AUTO OFF" ! Configure loopback delay
130
140 OUTPUT 714;"SETUP:FBERROR:MANUAL:DELAY 6" ! Set frame delay to 6 frames in order
150
160 OUTPUT 714;"CALL:CELL:POWER:AMPLITUDE -102 DBM" ! Sets the cell power level
170
180
190 OUTPUT 714;"INITIATE:FBERROR"
200 REPEAT
210 OUTPUT 714;"INITIATE:DONE?"
220 ENTER 714;Meas_comp$
230 PRINT Meas_comp$
240 UNTIL Meas_comp$="FBER"
250 OUTPUT 714;"FETCH:FBERROR?"
260 ENTER 714;Integrity,Bits_tested,Fas_bit_ratio,Fas_bit_err_cnt
270 OUTPUT 714;"CALL:CELL:POWER:AMPLITUDE -85 DBM" ! Sets the cell power level
280
290 END
! 5 seconds.
! a good level.
! Single Trigger.
! at 10,000.
! control to manual.
! to correlate uplink and downlink bits.
! Start a FBER measurement.
! to a good level.
S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\prog_fber_proc.fm
Programming a Fast Bit Error Measurement
28.
! to 500 ms.
! to a "low" level for the
! BER measurement.
72