Agilent Technologies E1445A Manual de usuario descargar pdf (Pagina 274)

100

101

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

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