User`s manual

Using the Front Panel’s “Digital Port In” Connector
You can use the “Digital Port In” connector to download data to the
segment memory (
[SOURce:]ARBitrary:DOWNload command), to change
segment sequences without aborting the present operation, or to drive the
DAC directly (
[SOURce:]ARBitrary:DAC:SOURce command).
The WAVSELFP program selects three different sequences using the “Digital
Port In” connector. Sequence 1 is a Sin (X)/X waveform, sequence 2 is a
damped sine waveform, and sequence 3 is a sine wave with spikes waveform.
The program downloads segment data as indefinite length arbitrary block data
using the
[SOURce:]LIST[1][:SEGMent]:COMBined command. Select the
sequences as follows:
FPCLK is clocked, other data lines open – Sequence 3
FPCLK is clocked, FP000 to low – Sequence 2
FPCLK is clocked, FP001 to low – Sequence 1
BASIC Program Example (WAVSELFP)
1 !RE-STORE "WAVSELFP"
2 !This program changes the output waveform sequence once the AFG has been
3 !INITiated by writing the location of a sequence’s base address to the
4 !Waveform Select register. All register reads and writes are 16 bit.
5 !The program uses the front panel ’Digital Port In’ connector to
6 !change the sequences, as follows:
7 !FPCLK is clocked, other data lines open – Sequence 3
8 !FPCLK is clocked, FP000 to low – Sequence 2
9 !FPCLK is clocked, FP001 to low – Sequence 1
10 !
20 !Assign an I/O path between the computer and the AFG
30 ASSIGN @Cmd TO 80900
40 ASSIGN @Afg TO 80910
50 ASSIGN @Afg1 TO 80910;FORMAT OFF !path for binary data
60 Laddr=80 !logical address for AFG
70 COM @Cmd,@Afg,@Afg1,Base_addr,Seq1_addr,Seq2_addr,Seq3_addr
80 !
90 !Subprograms which reset the AFG and erase all existing waveforms.
100 CALL Rst
110 CALL Wf_del
120 !
130 !SCPI commands which configure the AFG
140 OUTPUT @Afg;"SOUR:FREQ1:FIX 4.096E6;"; !Sample rate
150 OUTPUT @Afg;":SOUR:FUNC:SHAP USER;"; !function
160 OUTPUT @Afg;":SOUR:VOLT:LEV:IMM:AMPL 2.1V" !amplitude
170 OUTPUT @Afg;"SOUR:ARB:DAC:SOUR INT" !dac data source
180 OUTPUT @Afg;"SOUR:ARB:DAC:FORM SIGN" !dac data format
190 !
Continued on Next Page
272 High Speed Operation Chapter 7