268 Keysight E4980A/AL Precision LCR Meter
Overview of Remote Control
Status Byte
8-
Enabling the Status Byte
A service request (SRQ) will be generated when any enabled bit in the status
byte register is set to “1.” Therefore, to enable/disable any bits of the status
byte register, you can set bits in the service request enable register. These bits
correspond to bits in the status byte register. When a bit is set in the service
request enable register, it enables that bit in the status byte register to request
service. To set bits in the service request enable register, the *SRE command is
used. The syntax of the *SRE command is:
*SRE <n>
Where, <n>: decimal number (0 to 255)
For example,
If <n> is equal to 160 (10100000 in binary notation), bits 5 and 7 are enabled as
follows.
In this case, when either bit 5 or bit 7 of the status byte is set to “1,” a service
request is generated.
The default setting is *SRE 0 (all bits of the status byte are disabled).
Bit No. of Status Byte MSB LSB
7 6 5 4 3 2 1 0
Bit Pattern for *SRE command 1 0 1 0 0 0 0 0
Bit 6 (RQS) is non-maskable, and bits 0 to 3 are always 0 (zero). Thus, it is
meaningless to mask these bits. (The *SRE command’s bit pattern for
masking bit 6 is ignored, while the *SRE command’s bit pattern for
masking bits 0 to 6 is accepted, but is meaningless.)
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