Common Commands  CMU 
1100.4903.12 6.4  E-10 
The CMU firmware versions are listed after the hardware equipment: 
 
Response Description   Response Description 
uP1 –   0 not used 
uP2 –   0 not used 
0  not used    0  not used 
 
*PRE 0 to 255  
  PARALLEL POLL REGISTER ENABLE sets parallel poll enable register to the value indicated. 
Query *PRE? returns the contents of the parallel poll enable register in decimal form. 
 
*PSC 0 | 1 
  POWER ON STATUS CLEAR determines whether the contents of the ENABle registers is main-
tained or reset in switching on.  
 
  *PSC = 0   causes the contents of the status registers to be maintained. Thus a service request 
can be triggered in switching on in the case of a corresponding configuration of status 
registers ESE and SRE. 
 
 *PSC 
=
 0  resets the registers. 
 
  Query *PSC? reads out the contents of the power-on-status-clear flag. The response can be 0 or 1. 
*RST  
  RESET sets the instrument to a defined default status. The command resets all function groups and 
test modes, restoring the default values defined for remote control operation. *RST is equivalent to 
SYSTem:RESet[:ALL]. The default settings are indicated in the description of commands.  
*SRE 0 to 255  
 SERVICE REQUEST ENABLE sets the service request enable register to the value indicated. Bit 6 
(MSS mask bit) remains 0. This command determines under which conditions a service request is 
triggered. Query *SRE? reads the contents of the service request enable register in decimal form. Bit 
6 is always 0. 
 
*STB? 
  READ STATUS BYTE QUERY reads the contents of the status byte in decimal form. 
 
*TST?  
  SELF TEST QUERY triggers selftests of the instrument and outputs an error code in decimal form 
(the output is zero in the current firmware version). 
 
*WAI 
 WAIT-to-CONTINUE only permits the servicing of the subsequent commands after all preceding 
commands have been executed and all signals have settled (see also chapter 5  and "*OPC").