HP 22A, 83620A, 24A manual Using the User Flatness Correction Commands Example Program, Clear Screen

Using the User Flatness

Correction Commands,

Example Program 8

The following program interrogates the synthesizer and an HP 437B power meter for frequency and power information respectively.

The synthesizer (an HP 83620A) is programmed to sweep from

2 to 20 GHz, with frequency-correction pairs every 100 MHz and

+5 dBm leveled output power. For this example, we assume that the path losses do not exceed 5 dBm and that the HP 437B power meter already has its power sensor’s calibration factors stored in sensor data table 0. If another power meter is used, the power sensor’s calibration factors will have to be stored in a look-up table. Modify the program to suit your particular measurement requirements. Up to 801 points may be entered in the user flatness correction table with this program.

SCPI commands are used to set up the source parameters and enter correction frequencies and data into the correction table.

10!Assign the address of the source and power meter

20ASSIGN QSource TO 719

30ASSIGN @Meter TO 713

40INTEGER Error-flag

50ABORT 7

60!

70!Set up source

80OUTPUT @Source; "*RST"

90OUTPUT @Source; "FREQuency:MODE SWEep; STARt 2 GHZ; STOP 20 GHZ"

100OUTPUT @Source; "SWEep:TIME 200 MS"

110OUTPUT @Source; "POWer:LEVel 5 DBM;:INITiate:CONTinuous ON"

120	OUTPUT @Source; "*OPC?"	!Is o p e r a t i o n c o m p l e t e ?
130	ENTER @Source; Done
140	!
150 !Set up power meter
160 OUTPUT @Meter; "PR"
170 OUTPUT @Meter; "FA"
180 OUTPUT @Meter; "TRO"
190	!
200	!Zero power meter
210	OUTPUT @Source; "POWer:STATe OFF"	!Make s u r e R F i s o f f !

2 2 0 Z e r o - m e t e r ( @ M e t e r , E r r o r - f l a g )

230IF Error - flag THEN

240BEEP

250CLEAR SCREEN

260PRINT "Error: Meter did not complete zeroing operation!"

270ELSE

280!

29 0 ! S e t u p c o r r e c t i o n f r e q u e n c i e s i n U s e r F l a t n e s s C o r r e c t i o n t a b l e

300OUTPUT @Source; "CORRection:FLATness I';

310Start_freq=2

320Stop_freq=20

330Increment=.1

340Freq=Start-freq

350WHILE Freq<Stop-freq

1-96 Getting Started Programming