10.7  Limit Subsystem 
This subsystem controls the voltage frequency and current limit of the power source. These 
limits are set at the factory and depend on the power source rating.  It is not accessible by 
the user. The query format is accessible however. 
Subsystem Syntax 
  LIMit: 
    CURRent?      Queries the upper current limit 
    FREQuency: 
          LOW?  Queries the lower frequency limit 
          HIGH?  Queries the upper frequency limit 
    VOLTage?      Queries the upper voltage limit 
 
LIMit:CURRent? 
This command queries the maximum current limit the power source will operate at in the low 
voltage range.   
Command Syntax  LIMit:CURRent <NRf> 
Parameters  maximum current limit at low voltage range  [command 
protected] 
Query Syntax  LIMit:CURRent? 
Returned Parameters  <NR2> 
LIMit:FREQuency:LOW? 
This command queries the lower frequency limit of the power source.  On the 2003RP-AV, 
the frequency range may have been factory configured to a fixed single value.  In this case, 
the High and Low frequency limits will be set to the same value and both queries will return 
the same number.  Sending a frequency command with any value other than the set value 
will result in a “-100, Command Error”. 
Command Syntax  LIMit:FREQuency:LOW <NRf> 
Parameters  Low freq limit   [command protected]  
Query Syntax  LIMit:FREQuency:LOW? 
Returned Parameters  <NR2> 
LIMit:FREQuency:HIGH? 
This command queries the upper frequency limit of the power source. On the 2003RP-AV, 
the frequency range may have been factory configured to a fixed single value.  In this case, 
the High and Low frequency limits will be set to the same value and both queries will return 
the same number.  Sending a frequency command with any value other than the set value 
will result in a “-100, Command Error”. 
Command Syntax  LIMit:FREQuency:HIGH <NRf> 
Parameters  High freq limit   [command protected]  
Query Syntax  LIMit:FREQuency:HIGH? 
Returned Parameters  <NR2>