Sweeping Using Start And Span Frequencies - HP E1340A User Manual

Sweeping Using
Start and Span
Frequencies
HP IBASIC (SMPLSWP2)
Chapter 4
The following program specifies a start frequency and a frequency span to
continuously sweep from 1 kHz to 21 kHz. The program also queries the
start frequency, stop frequency, center frequency, and frequency span to
show the relationship between them. Using the flowchart as a guide, the
steps of this program are:
1. Select the Frequency Sweep Mode -
[SOURce:]FREQuency:MODE SWEep
2. Set the Start Frequency -
[SOURce:]FREQuency:STARt <
3. Set the Frequency Span -
[SOURce:]FREQuency:SPAN <
4. Set the Output Function -
[SOURce:]FUNCtion[:SHAPe] <
5. Set the Signal Amplitude -
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <
6. Place the AFG in the Wait-for-arm State -
INITiate[:IMMediate]
1 !RE-SAVE"SMPLSWP2"
2 !This program sweeps a sine wave from 1 kHz to 21 kHz by
3 !specifying a start frequency and a frequency span.
4 !
10 !Assign I/O path between IBASIC and the E1340A.
20 ASSIGN @Afg TO 80910
30 COM @Afg
40 !
50 !Set up error checking
60 ON INTR 8 CALL Errmsg
70 ENABLE INTR 8;2
80 OUTPUT @Afg;"*CLS"
90 OUTPUT @Afg;"*SRE 32"
100 OUTPUT @Afg;"*ESE 60"
110 !
120 !Call the subprogram which resets the AFG.
130 CALL Rst
140 !
150 !Set AFG parameters
160 OUTPUT @Afg;"SOUR:FREQ:MODE SWE;";!frequency mode
170 OUTPUT @Afg;":SOUR:FREQ:STAR 1E3;";!start frequency
180 OUTPUT @Afg;":SOUR:FREQ:SPAN 20E3;";!frequency span
190 OUTPUT @Afg;":SOUR:FUNC:SHAP SIN;"; !function
Continued on next page
HP E1340A Sweeping and Frequency-Shift Keying
start_freq
>
freq_span >
shape >
amplitude >
88