Remote Commands
Summary of Commands and Queries
6
6-37
SRC_PREF?
Overlapped CoupledIEEE-488 RS-232 Sequential
xx xxx
(Source Preference query) Return the source preference from 5500A Calibrator or
5725A Amplifier, when a 5725A Amplifier is attached.
Responses: P5500 (5500A Calibrator is set as the source preference)
P5725 (5725A Amplifier is set as the source preference)
Example: SRC_PREF? returns P5725
Return P5725 when the source preference is the 5725A Amplifier.
*SRE
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Service Request Enable command) Load a byte into the Service Request Enable (SRE)
register. (See “Service Request Enable Register (SRE)” in Chapter 5. Since bit 6 is not
used (decimal value 64), the maximum entry is 255 - 64 = 191.
Parameter: <value> (the decimal equivalent of the SRE byte, 0 to 191)
Example: *SRE 56
Enable bits 3 (EAV), 4 (MAV), and 5 (ESR).
*SRE?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Service Request Enable query) Return the byte in the Service Request Enable (SRE).
Response: <value> (the decimal equivalent of the SRE byte, 0 to 191)
Example: *SRE? returns 56
Return 56 when bits 3 (EAV), 4 (MAV), and 5 (ESR) are enabled.
SRQSTR
Sequential Overlapped
Coupled
IEEE-488 RS-232
x xx
x
x
(Service Request String command) Set the Serial Mode SRQ (Service Request)
response (up to 40 characters) in the 5500A non-volatile memory. (While saving
configuration data in the non-volatile memory, a period of about 2 seconds, the 5500A
does not respond to remote commands.) The SRQSTR is sent to the host over the serial
interface when the SRQ line is asserted (terminal mode only). Default format is:
SRQ: %02x %02x %04x %04x
where the term %02x (8 bits) means print the value in hexadecimal with exactly 2 hex
digits, and %04x (16 bits) means print the value in hexadecimal with exactly 4 hex
digits. The string representations are:
SRQ: (STB) (ESR) (ISCR0) (ISCR1)
See the commands, respectively, *STB?, *ESR?, ISCR0?, and ISCR1? A typical
string in the default format sent to the host is: SRQ: 44 00 0000 1000. This
command is for format. See the SPLSTR command for the serial poll response.
Parameter: “<string>\n” (\n represents the Line Feed character, hex 0A)
Example: SRQSTR “SRQ: %02x %02x %04x %04x\n”
Set the SRQSTR to the default values SRQ: %02x %02x %04x %04x\n.
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