:COMMunicate
:SERial[n] [:RECeive]
:PACE :THReshold
:STARt
SYSTem:COMMunicate:SERial[n][:RECeive]:PACE:THReshold:STARt
< char_count> configures the input buffer level at which the specified interface
may send the XON character (ASCII 11
16
), assert the DTR line, and/or assert
the RTS line.
Parameters Parameter
Name
Parameter
Type
Range of
Values
Default
Units
char_count numeric 1 through 99 for built-in
1 through 8191 for E1324A
none
Comments • To determine the size of the input buffer of the serial interface you are
using, send SYST:COMM:SER[n]:PACE:THR:START? MAX. The
returned value will be the buffer size less one.
•…STARt must be set to less than …STOP.
• The …THR:STAR command has no effect unless
…PACE:PROT XON, …CONT:DTR IBF, or …CONT:DTR IBF has
been sent.
• Related Commands: …PACE:PROT XON | NONE, …CONT:DTR,
…CONT:RTS
• *RST Condition: No change
Example Set interface to send XON when input buffer contains 10 characters.
SYST:COMM:SER0:PACE:PROT XON
SYST:COMM:SER0:PACE:THR:STAR 10
:COMMunicate
:SERial[n] [:RECeive]
:PACE :THReshold
:STARt?
SYSTem:COMMunicate:SERial[n][:RECeive]:PACE:THReshold:STARt?
[MIN | MAX] returns:
• The current start threshold if no parameter is sent.
• The maximum allowable setting if MAX is sent.
• The minimum allowable setting if MIN is sent.
Comments • To determine the size of the input buffer of the serial interface you are
using, send SYST:COMM:SER[n]:PACE:THR:START? MAX. The
returned value will be the buffer size.
Example Return current start threshold
SYST:COMM:SER0:PACE:THR:STAR?query for threshold value
enter statement statement enters a numeric
value
SYSTem:COMMunicate :SERial[n] [:RECeive] :PACE :THReshold :STARt
7-42 System Instrument Command Reference
