Programming an FER (Frame Error Rate) Measurement

Programming Example

 
11   !RE-SAVE "c:\roadhog\programs\fer.txt"
20   !This program measures frame error rate.
30   !See "Receiver Sensitivity and Dynamic Range" in TIA/EIA-98-D for
40   !Specifications and Standards.
50   CLEAR SCREEN
60   A=714
70   !***Specify call parameters***
80   Systype$="DIGITAL2000"  !Cell System Type
90   Band$="USCELLULAR"      !Cell band
100  Channel=384   !RF Channel
110  Sid=1         !System Identification
120  Nid=1         !Network Identification
130  Radio_config$="F3R3"  !Radio Configuration
140  Service_opt$="SO2"    !Service Option
150          !
160  !***Specify test parameters***
170  !Reverse channel, forward channel frequencies for amplitude offset (path loss)
172  Loss_frequency$="836 MHZ,881 MHZ"
182  !Path loss at reverse channel, forward channel frequencies
190  Expected_loss$="-2,-2"
200  Ior=-104         !Cell power
210  Pilot=-7         !Pilot channel power level
220  Traffic=-15.5    !Traffic channel power level
230          !
240  ON TIMEOUT 7,20 CALL Timeout !Calls "Timeout" routine
250  OUTPUT A;"SETUP:CFER:TIMEOUT:STIME 10 S" !Sets FER measurement timeout to 10 seconds
260  OUTPUT A;"SYST:COMM:GPIB:DEB:STAT ON"    !Turns debug state on
270          !
280  !***Set up path loss***
282  !Enters frequencies in Amplitude Offset table
290  OUTPUT A;"SYSTEM:CORRECTION:SFREQUENCY ";Loss_frequency$
300  !Enters loss values in Amplitude offset table
310  OUTPUT A;"SYSTEM:CORRECTION:SGAIN ";Expected_loss$
320         !
340  !***Set up call parameters***
350  OUTPUT A;"CALL:OPER:MODE CALL" !Sets Operating Mode to Active Cell
360  OUTPUT A;"CALL:SYSTEM ";Systype$ !Sets System Type
370  OUTPUT A;"CALL:BAND ";Band$      !Sets Cell Band for selected System Type
380  OUTPUT A;"CALL:CHAN ";Channel !Sets Channel for selected System Type and Cell Band
390  OUTPUT A;"CALL:POWER -50" !Sets and turns on Cell Power for selected System Type
400  OUTPUT A;"CALL:SID ";Sid        ! Sets System Identification
410  OUTPUT A;"CALL:NID ";Nid        ! Sets Network Identification
420  OUTPUT A;"CALL:RCON ";Radio_config$  !Sets Radio Configuration
430  OUTPUT A;"CALL:SOPTION ";Service_opt$  !Sets service option for selected System Type
440                                         !and Radio Configuration
450  OUTPUT A;"CALL:PROT PREV6" !Sets Protocol Revision for the selected System Type
460  OUTPUT A;"CALL:PAG:DRAT FULL" !Sets Paging channel data rate to full rate
470  OUTPUT A;"CALL:PIL -7"     !Sets Pilot to default
480  OUTPUT A;"CALL:SYNC -16"   !Sets Sync to default
490  OUTPUT A;"CALL:PAG -12"    !Sets Paging to default
500  OUTPUT A;"CALL:FCH -15.6"  !Sets Traffic to default
510          !
520  PRINT "Turn on mobile station...press continue when it has found service and registered"
530  PAUSE
540  CLEAR SCREEN
550  OUTPUT A;"CALL:REG:TIMER:STATE 0"  !Turns timer-based registrations off
560  WAIT 2   !Waits 2 seconds for any timer-based registrations to clear out
570          !
580  !***Page the mobile station***
590  DISP "Paging mobile station..."
600  OUTPUT A;"CALL:ORIG"  !Pages the mobile station
610  OUTPUT A;"CALL:CONNECTED:STATE?" !Queries for connected/idle state...hangs until state
620                                   !change detector is disarmed
630  ENTER A;Call_connected
640  IF NOT Call_connected THEN
650    DISP "Call attempt failed"
660    STOP
670  ELSE
680    DISP "Call connected"
690  END IF
700          !
710  !***Set up measurement parameters***
720  OUTPUT A;"SETUP:CFERROR:CONTINUOUS OFF" !Sets trigger arm state to single
730  OUTPUT A;"CALL:POW ";Ior  ! Sets Cell Power for the selected System Type
740  OUTPUT A;"CALL:PIL ";Pilot !Sets Pilot channel level
750  OUTPUT A;"CALL:FCH ";Traffic !Sets Traffic channel level
760          !
770  !***Obtain measurement results***
780  OUTPUT A;"INITIATE:CFERROR" !Initiates a frame error rate measurement
790  DISP "Measuring FER"
800  OUTPUT A;"FETCH:CFERROR?" !Queries the test set for frame error rate measurement results
810  ENTER A;Integrity,Fer_test,Fer_ratio,Fer_count,Frames_tested
820          !
830  SELECT Fer_test  !Assign pass/fail results to a string
840  CASE 0
850    Pass_fail$="PASSED"
860  CASE 1
870    Pass_fail$="FAILED"
880  CASE 2
890    Pass_fail$="MAXIMUM NUMBER OF FRAMES WERE TESTED"
900  CASE 3
910    Pass_fail$="UNKNOWN"
920  END SELECT
930          !
940  PRINT "Integrity indicator = ";Integrity
950  PRINT "FER test results = ";Pass_fail$,"FER ratio = ";Fer_ratio
960  PRINT "FER count = ";Fer_count,"Number of frames tested = ";Frames_tested
970          !
980  OUTPUT A;"FETC:CFER:ERAS:FORW?"   ! Fetch forward erasure
990  ENTER A;For_eras
1000 PRINT "FER forward erasure data = ";For_eras;
1010         !
1020 OUTPUT A;"FETC:CFER:ERAS:REV?"  ! Fetch reverse erasure
1030 ENTER A;Rev_eras
1040 PRINT "FER reverse erasure data = ";Rev_eras
1050         !
1060 OUTPUT A;"FETC:CFER:ERR?"   ! Fetch mobile error
1070 ENTER A;Mob_err
1080 PRINT "FER mobile errors = ";Mob_err
1090 DISP "Test complete"
1100 !***Return to default call processing states***
1110 OUTPUT A;"CALL:POW:DIG2000 -50"    ! Returns cell power to -50 dBm/1.23 MHz
1120 OUTPUT A;"CALL:REG:TIMER:STATE ON"  !Returns timer-based registration to ON
1130          !
1140 OUTPUT A;"CALL:END"          !Ends the call
1150 END
1160  Timeout: SUB Timeout          ! Global timeout handler
1170    PRINT "Program timed out"
1180    CLEAR 7
1190    CLEAR 714
1200  SUBEND

Related Topics

Measuring Frame Error Rate (FER)

Frame Error Rate (FER) Measurement Description

Frame Error Rate Measurement Troubleshooting

Programming a TDSO Frame Error Rate Measurement

Control Program Example

READ? Subsystem

SETup:CFERror

INITiate

FETCh:CFERror