MDO3000 Programmer Manual.pdf - 第942页

Commands Listed in A lphabetical Order TRIGger:A:UP Perthreshold:RF This command s pecifies the upp er threshold when the internal RF power level is used during runt triggering. T o specify the lower threshold for the RUN…

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Commands Listed in Alphabetical Order
TRIGger:A:LOG
Ic:CLAss to further select the logic trigger class (either
LOGIC
or SETHOLD ).
PULSe specifie
s that a trigger occurs when a specified pulse is found. Use
TRIGger:A:PULse:CLAss to further select the pulse trigger class (either runt,
width, transition or timeout).
BUS specifies that a trigger occurs when a bus signal is found. Supports CAN,
I
2
C, SPI, RS-232, Ethernet, MIL-STD-1553, LIN, USB, audio, FlexRay buses
(with the appropriate application module installed) as well as parallel buses
(MSO4000B, MDO4000/B/C, and MDO3000 Series oscilloscopes with option
MDO3MSO installed only). Use TRIGger:A:BUS to set the bus type.
VIDeo specifies that the trigger occurs when a video signal is found.
Examples
TRIGGER:A:TYPE PULSe sets the A trigger type to PULSE.
TRIGGER:A:TYPE? might return :TRIGGER:A:TYPE PULSE indicating that the
A trigger type is a pulse trigger.
TRIGger:A:UPPerthreshold:CH<x>
This command sets the upper threshold for channel <x>, where x is the analog
channel number 1–4. Each channel can have an independent level. Used only for
runt and transition trigger types.
Group
Trigger
Syntax
TRIGger:A:UPPerthreshold:CH<x> {<NR3>|ECL|TTL}
TRIGger:A:UPPerthreshold:CH<x>?
Arguments
<NR3> is a floating point number that specifies the threshold level, in volts.
ECL specifies a preset ECL high level of –1.3V.
TTL specifies a preset TTL high level of 1.4V.
Examples
TRIGGER:A:UPPERTHRESHOLD:CH2 50E-3 sets the upper limit of the pulse
runt trigger to 50 mV for channel 2.
TRIGGER:A:UPPERTHRESHOLD:CH2? might return :TRIGGER:A:
UPPERTHRESHOLD:CH2 1.2000E-01
indicating that the upper limit of the pulse
runt trigger is set to 120 mV.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-911
Commands Listed in Alphabetical Order
TRIGger:A:UP
Perthreshold:RF
This command specifies the upper threshold when the internal RF power level is
used during runt triggering. To specify the lower threshold for the RUNT trigger
type as well a
s the single threshold for the Pulse and Timeout trigger types, use
the command TRIGger:A:LOWerthreshold:RF. To choose the RUNT trigger type,
use the command TRIGger:A:PULse:CLAss. To specify RF power as a source
during runt triggering, use TRIGger:A:RUNT:SOUrce.
Conditions
MDO4000/B/C models only. Also requires installation of an MDO4TRIG
application module.
Group
Trigger
Syntax
TRIGger:A:UPPerthreshold:RF {<NR3>}
TRIGger:A:UPPerthreshold:RF?
Related Commands
TRIGger:A:TYPe, TRIGger:A:LOWerthreshold:RF
Arguments
<NR3> is a floating point number that specifies the threshold to use, in the
currently selected RF units (using RF:UNIts). The range is (ref level – 40 dBm) to
(ref level + 10 dBm), but never less than –65 dBm or more than +30 dBm.
Examples
TRIGger:A:UPPerthreshold:RF —1.000E+1 sets the threshold to –10 dBm.
TRIGger:A:UPPerthreshold:RF? might return -30.0000, indicating that the
threshold set to –30.000 dBm (assuming the units are currently set to dBm).
TRIGger:A:VIDeo? (Query Only)
Returns the A trigger video parameters.
Conditions
This command requires a DPO4VID application module to use any standard
besides NTSc, PAL, or SECAM, except for MDO3000 models, which do not
require an application module.
Group
Trigger
Syntax
TRIGger:A:VIDeo?
2-912 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Examples
TRIGGER:A:VID
EO?
might return :TRIGGER:A:V IDEO:STANDARD
BILEVELCUSTOM;SYNC ALLLINES;LINE 4; HOLDOFF:FIELD
0.0E+0;:TRIGGER:A:VIDEO:POLARITY POSITIVE;CUSTOM:FORMAT
PROGRESSIVE;LINEPERIOD 63.5600E-6;SYNCINTERVAL 4.7200E-6
TRIGger:A:VIDeo:CUSTom{:FORMat|:TYPe}
This command sets the video trigger format (either interlaced or progressive)
to use for triggering on video signals. To use this command, you must also
set the video standard to
BILevelcustom or TRILevelcustom (using
TRIGger:A:VIDeo:STANdard).
Conditions
This command requires a DPO4VID application module to use any standard
besides NTSc, PAL, or SECAM, except for MDO3000 models, which do not
require an application module.
Group
Trigger
Syntax
TRIGger:A:VIDeo:CUSTom{:FORMat|:TYPe}
{INTERLAced|PROGressive}
TRIGger:A:VIDeo:CUSTom{:FORMat|:TYPe}?
Arguments
INTERLAced argument sets the format to interlaced video lines.
PROGressive argument
sets the format to progressive video lines.
Examples
TRIGGER:A:VIDEO:CUSTOM:FORMAT PROGRESSIVE sets the custom format for
the A video trigger t
o progressive lines.
TRIGGER:A:VIDEO:CUSTOM:FORMAT? might return :TRIGGER:A:VIDEO:
CUSTOM:FORMAT INTERLACE D
indicating that interlaced is selected as the
custom format for the A video trigger.
TRIGger:A:VIDeo:CUSTo m:LINEPeriod
This command sets the line period for the standard under test. To use this
command, you must also set the video standard to
BILevelcustom or
TRILevelcustom (using TRIGger:A:VIDeo:STANdard).
Conditions
This command requires a DPO4VID application module to use any standard
besides NTSc, PAL, or SECAM, except for MDO3000 models, which do not
require an application module.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-913