SME Test Procedure
1038.6002.02 5.9 E-13
Measurement
À Setting at the storage oscilloscope
- Time base 2 ms/div
- Sensitivity corresponding to the video output of the analyzer
- Triggering externally by the positive edge at 1.5 V.
À Send the starting frequency first and then the stop frequency from
the controller.
The settling curve is displayed on the screen of the oscilloscope
triggered externally.
Relative deviation from the rated frequency after 10 ms <1E-
7
À Repeat measurement with exchanged starting and stop
frequencies.
Recommended measuring
frequencies
Starting frequency Stop frequency
749 MHz 751 MHz
751 MHz 1101 MHz
93 MHz 1500 MHz
840 MHz 942 MHz
1350.2 MHz 1351.4 MHz
751 MHz 2200 MHz (SME03E)
751 MHz 3000 MHz (SME03)
751 MHz 6000 MHz (SME06)
Quick-Basic program for the controller
CLS
iecadresse% = 28 IEC-bus address of the SME (28)
CALL IBFIND("DEV1", generator%) Open DEV1 and obtain access number
CALL IBPAD(generator%, iecadresse%) Set IEC-bus address of the DEV1 to 28
iecterm% = &HA ’ Set EOS to LINE FEED
CALL IBEOS(generator%, iecterm% + &H800)
CALL IBWRT(generator%, "POW 0dBm")
DO
INPUT "Start frequency in MHz";F1$
INPUT "Stop frequency in MHz";F2$
DO
CALL IBWRT(generator%, "FREQ" + F1$ + "MHz")
PRINT "frequency:";F1$; "MHz"
DO ’ Wait for key
kbd$ = INKEY$
LOOP UNTIL LEN(kbd$)
SWAP F1$, F2$
LOOP UNTIL kbd$ = CHR$(27) ’ Exit using ESCAPE
INPUT "Repeat (y/n)"; w$
LOOP UNTIL NOT UCASES$(w$) = "y"
END
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