GPIB Command Compatibility List Error Handling
254 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition
Error Handling
Most error commands and error texts for all instruments are new.
The HP 8153A timed out for every error. Errors are handled differently by 
the Agilent 8163A/B and 8164A/B; instead of timing out for every error, 
special values are returned for erroneous queries. Table 16  and Table 17  
detail the new errors 
The error queue is written to as before.
Table 16 Error Handling Changes
Expected Return Value Returned Value Affects
FLOAT(32/64) FLT/DBL_MAX 8153
(U)INT(16/32) (U)INT(16/32)_MAX 8153
Block " " 8153
Boolean Value 0 8153
Enum Time out 8153
Table 17 Specific Errors
 Command Change Affects
FETCh:POWer? - without 
using a preceding trigger
Returns the last valid value instead of timing 
out. 
No error is generated.
8153