HP E8402A, User And Service Manual, Page: 139 / 249

Programming the Enhanced Monitor 141
Chapter 3
SYSTem:COMMunicate:SERial[:RECeive]:SBITs < bits >
SYSTem:COMMunicate:SERial[:RECeive]:SBITs? [MIN|MAX|DEF]
SYSTem:COMMunicate:SERial[:RECeive]:SBITs sets the number of stop bits for
RS-232 communication. Valid parameters are 1 or 2. Default is 1 stop bit.
SYSTem:COMMunicate:SERial[:RECeive]:SBITs? returns an integer (1 or 2)
representing the number of stop bits for RS-232 communication.
Parameters
Returned Data
Comments
•
When used with :SBITs, the MIN parameter sets the number of data bits to the
minimum value, 1. When used with :SBITs? it returns the minimum value of 2
but does not change the actual number of data bits used. Likewise, MAX sets
or returns the maximum number of stop bits (2), and DEF sets/returns the
default number of data bits, 1.
•
While this command operates independently of either the ...BITs and ...PARity
<type> commands, there are combinations which are not allowed because of
their data frame bit width. The following table shows the possible
combinations:
Error Conditions
The following table lists the most common error conditions and causes. Error
numbers and corresponding messages can be found using
SYSTem:ERRor? query.
Reset Condition
*RST resets sbits to the last value saved by the SYST:NVS command.
Name Type Range of Values Default Description
< bits> numeric
enum. 1, 2
MIN|MAX|DEF 1 Number of Stop Bits.
Type Range Description
int16 1, 2 Number of Stop Bits.
...BITS ...PARity < type> ...SBITs Frame Bits
7 NONE 1 disallowed
7 NONE 2 10
7 ODD/EVEN 1 10
7 ODD/EVEN 2 11
8 NONE 1 10
8 NONE 2 11
8 ODD/EVEN 1 11
8 ODD/EVEN 2 disallowed
Number Message Probable Cause
-222 “Data out of range” You tried to set a disallowed combination of Bits,
Parity, and Stop Bits.