user manual

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
20 ASSIGN QSource TO 719
30 ASSIGN @Meter TO 713
40 INTEGER Error-flag
50 ABORT 7
60 !
70
!Set up source
80
OUTPUT @Source; "*RST"
90 OUTPUT @Source; "FREQuency:MODE SWEep; STARt 2 GHZ; STOP
20
GHZ"
100 OUTPUT @Source; "SWEep:TIME 200 MS"
110 OUTPUT @Source; "POWer:LEVel 5 DBM;:INITiate:CONTinuous
ON"
120 OUTPUT @Source; "*OPC?" !Is operation complete?
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 sure RF is off!
220 Zero-meter (@Meter, Error-flag)
230 IF Error-flag THEN
240 BEEP
250 CLEAR SCREEN
260 PRINT "Error: Meter did not complete zeroing operation!"
270 ELSE
280 !
290 !Set up correction frequencies in User Flatness Correction table
300
OUTPUT @Source;
"CORRection:FLATness I';
310 Start_freq=2
320 Stop_freq=20
330 Increment=.1
340 Freq=Start-freq
350 WHILE Freq<Stop-freq
1-96 Getting Started Programming