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24 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP
Programming Output
Channels
This section deals with all aspects of programming output channel functions.
Channels are configured for output with the I/O direction switches (see
"Configuring Input-Output direction" on page 6). A related error message:
3124, "E1538 OE switch OFF conflicts with this command."
Controlling Output
Polarity
Use OUTPut:POLarity NORMal | INVerted,(@<ch_list>) to configure
output channel logic sense. The operations is as follows:
OUTP:POL NORM a logical 1 output from the algorithm, or generated
within the E1538 (single or repetitive pulses) will
turn off the output transistor (can be pulled up).
OUT:POL INV a logical 1 output from the algorithm, or generated
within the E1538 (single or repetitive pulses) will turn
off the output transistor (pulls low).
To configure channels 40 to 43 to drive their outputs low for a logic 1
OUTP:POL INV,(@140:143)
Output Static
Digital State
This means setting a channel’s digital state when an algorithm executes. To
set individual channels to this function use the SCPI command
SOURce:FUNCtion[:SHAPe]:CONDition (@<ch_list>)
To configure channels 40 through 43 as static digital outputs, send
*RST
SOUR:FUNC:COND (@140:143)
default for all digital outputs
ALG:DEF ’ALG1’,’static float ch0=0, ch1=1, ch2=0, ch3=1; O140=ch0;
O141=ch1; O142=ch2; O143=ch3;’
INIT
Figure 15. Output Static Levels