The scpi status registers – Teledyne LeCroy PXA125 User Manual
Page 198
User Manual PXA125
Programming Reference 4-80
PXA125 with TCXO option.
*RST - Resets the generator to its default state. Default values are
listed in Table 4-1.
*SRE
*SRE? - Query the Status Byte enable register. The generator returns a
decimal value in the range of 0 to 63 or 128 to 191 since bit 6 (RSQ)
cannot be set. The binary-weighted sum of the number represents the
value of the bits of the Service Request enable register.
*STB? - Query the Status Byte summary register. The *STB? command
is similar to a serial poll but is processed like any other instrument
command. The *STB? command returns the same result as a serial
poll, but the "request service" bit (bit 6) is not cleared if a serial poll has
occurred.
*TRG - Triggers the generator from the remote interface. This command
effects the generator if it is first placed in the Trigger or Burst mode of
operation and the trigger source is set to "BUS".
The SCPI Status
Registers
The Model PXA125 uses the Status Byte register group and the
Standard Event register group to record various instrument
conditions. Figure 4-1 shows the SCPI status system.
An Event Register is a read-only register that reports defined
conditions within the generator. Bits in an event register are latched.
When an event bit is set, subsequent state changes are ignored. Bits
in an event register are automatically cleared by a query of that
register or by sending the *CLS command. The *RST command or
device clear does not clear bits in an event register. Querying an
event register returns a decimal value, which corresponds to the
binary-weighted sum of all bits, set in the register.
An Event Register defines which bits in the corresponding event
register are logically ORed together to form a single summary bit. The
user can read from and write to an Enable Register. Querying an
Enable Register will not clear it. The *CLS command does not clear
Enable Registers but it does clear bits in the event registers. To
enable bits in an enable register, write a decimal value that
corresponds to the binary-weighted sum of the bits required to enable
in the register.