58542 VXIbus Universal Power Meter
A-14
Publication 21555, Rev. E, September 2002
A.4.3
Reading Power Measurements Example 3
The following program configures the power meter for dual channel operation and uses the MEAS#?
command to return power measurement data in NORMal Mode. Please note that measurement speed
per channel decreases slightly in NORMal mode when two channels, versus only a single channel, are
connected and calibrated. In NORMal Mode, single channel measurement rates are slightly faster than
two channel measurement rates. If using CW power sensors, also please note that power measurements
are not performed at specifically the exact, simultaneous instant in time. In NORMal Mode there will
be a short time delay of about 3 ms between the two channels’ sample points, about two and a half orders
of magnitude faster than traditional CW power meters. In BURSt and SWIFT mode this time is about 1
ms. If the user needs to guarantee that power sampling occurs on both channels within a smaller interval
of time, this can be accomplished to within about 2% of the Sample Delay time plus 2 ns using the
Series 80350A Peak Power Sensors and triggering both sensors at the same time. The example below
operates with either Peak or CW power sensors.
260
ASSIGN @Pwr_mtr to 70101
270
CLEAR @Pwr_mtr
280
WAIT 1
290
OUTPUT @Pwr_mtr;CALC1:MODE NORM ! Can ONLY send Configuration Commands in Normal Mode!!
300
OUTPUT @Pwr_mtr;CALC1:POW 1
! Channel 1 configured to measure sensor 1 power
310
OUTPUT @Pwr_mtr;CALC1:UNIT W
! Transmitter output power in Watts.
320
OUTPUT @Pwr_mtr;CALC2:RAT 1,2
! Transmitter gain stays in default, dBm.
330
!
340
OUTPUT @Pwr_mtr;SENS1:CORR:FREQ 1.44E9
! Applies Cal Factor for 1.44 GHz to sensor 1 data.
350
OUTPUT @Pwr_mtr;SENS2:CORR:FREQ 0.96E9
! Applies Cal Factor for 960 MHz to sensor 2 data.
360
!
370
FOR I=1 TO 10
380
OUTPUT @Pwr_mtr;MEAS1?;MEAS2?
! Measures Power at sensors.
390
ENTER @Pwr_mtr;Chn_pow 1
400
ENTER @Pwr_mtr;Chn_1rat2
410
PRINT Chn_pow1,Chn_1rat2
420
NEXT I
430
!
550
END
Содержание 58542
Страница 3: ...DECLARATION OF CONFORMITY ...
Страница 4: ......
Страница 18: ...58542 VXIbus Universal Power Meter xiv Publication 21555 Rev E September 2002 ...
Страница 20: ...58542 VXIbus Universal Power Meter xvi Publication 21555 Rev E September 2002 ...
Страница 30: ...58452 VXIbus Universal Power Meter 1 10 Publication 21555 Rev E September 2002 ...
Страница 92: ...58542 VXIbus Universal Power Meter 2 62 Publication 21555 Rev E September 2002 ...
Страница 104: ...58452 VXIbus Universal Power Meter 3 12 Publication 21555 Rev E September 2002 ...
Страница 126: ...58452 VXIbus Universal Power Meter 5 8 Publication 21555 Rev E September 2002 ...
Страница 171: ......
Страница 172: ......
Страница 173: ......
Страница 174: ...21360 Rev A has not been u ...
Страница 175: ......
Страница 176: ......
Страница 177: ......
Страница 178: ......
Страница 179: ......
Страница 180: ......
Страница 181: ......
Страница 182: ......
Страница 248: ...58542 VXIbus Universal Power Meter C 2 Publication 21555 Rev E September 2002 ...