User manual

RIGOL Chapter 2 Command System
2-28 DS4000E Programming Guide
:BUS<n>:RS232:SBITs
Syntax
:BUS<n>:RS232:SBITs <stop bits>
:BUS<n>:RS232:SBITs?
Description
Sets or queries the number of stop bits following each frame of data of RS232 decoding on the specified
bus.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2}
--
<stop bits> Discrete {1|1.5|2} 1
Return Format
The query returns 1, 1.5, or 2.
:BUS<n>:RS232:TTHReshold
Syntax
:BUS<n>:RS232:TTHReshold <tthre>
:BUS<n>:RS232:TTHReshold?
Description
Sets or queries the threshold of TX source channel of RS232 decoding on the specified bus.
Parameter
Name Type Range Default
<n> Discrete {1|2} --
<tthre> Real
(-4 x VerticalScale - Offset) to (4 x VerticalScale - Offset)
Wherein, VerticalScale is the vertical scale of TX source
channel, refer to the :CHANnel<n>:SCALe command; Offset is
the vertical position of TX source channel, refer to
the :CHANnel<n>:OFFSet command.
0
Return Format
The query returns the threshold level in scientific notation.
:BUS<n>:RS232:TX
Syntax
:BUS<n>:RS232:TX <source>
:BUS<n>:RS232:TX?
Description
Sets or queries TX source channel of RS232 decoding on the specified bus.
Parameter
Name Type Range Default
<n> Discrete {1|2} --
<source> Discrete {CHANnel1|CHANnel2|CHANnel3|CHANnel4|OFF} CHANnel1