MDO3000 Programmer Manual.pdf - 第187页

Commands Listed in Alphabetical Order Syntax BUS? BUS:B<x>:ARINC429A:BITRate This command specifies the bit rate for the ARINC429 bus. Conditions This command requires installation of a DPO4A ERO app lication module…

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Commands Listed in Alphabetical Order
Group
Vertical
Syntax
AUXin:PRObe:UNIts?
Examples
AUXin:PROBE:UNITS? might return: :AUXin:PROBE:UNITS “V” indicating
that the units of measure for the attached probe are volts.
AUXOut:SOUrce
This command sets (or queries) the source for the Auxiliary Output port.
Group
M
iscellaneous
Syntax
AUXOut:SOUrce {ATRIGge r|MAIn|REFOut|EVENT|AFG}
AUXOut:SOUrce?
Arguments
ATRIGger is the default signal output of the auxiliary out port. MAIn is
synonymous with
ATRIGger.
REFOut specifies the reference oscillator output as the source for the auxiliary
output. (Not supported on MDO3000 models.)
EVENT refers to an internally generated oscilloscope event. The Mask and Act
on Event commands can cause an event output, such as a mask test completion
notification event.
AFG specifies the AFG sync out pulse. (Only available for MDO3000 and
MDO4000C models with the MDO3AFG or MDO4AFG option installed.)
Examples
AUXOut:SOUrce REFOut sets the instrument to use the reference oscillator
output as the source for the auxiliary output.
AUXOut:SOUrce? might return ATRIGGER, indicating the source for the
auxilliary out port is the A Trigger.
BUS? (Query Only)
Returns the parameters for each serial (if installed) and parallel bus.
Group
Bus
2-156 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Syntax
BUS?
BUS:B<x>:ARINC429A:BITRate
This command specifies the bit rate for the ARINC429 bus.
Conditions
This command requires installation of a DPO4AERO application module for
MDO4000C models, or MDO3AERO for MDO3000 models.
Group
Bus
Syntax
BUS:B<x>:ARINC429A:BITRate {LOW|HI|<NR1>}
BUS:B<x>:ARINC429A:BITRate?
Arguments
LOW sets the ARINC429 bit rate to handle low speed signals (12000
bits-per-second to 14500 bits-per-second).
HI sets the ARINC429 bit rate to handle high speed signals (100,000
bits-per-second)
<NR1> is a bit rate in bits-per-second. You can enter any positive integer, and the
instrument will coerce the value to the closest supported bit rate.
BUS:B<x>:ARINC429A:DATA:FORMAT
Specifies the format of the DATA field in ARINC429 packets on a bus.
Conditions
This command requires installation of a DPO4AERO application module for
MDO4000C models, or MDO3AERO for MDO3000 models.
Group
Bus
Syntax
BUS:B<x>:ARINC429A:DATA:FORMAT {DATA|SDIDATA|SDIDATASSM}
BUS:B<x>:ARINC429A:DATA:FORMAT?
Arguments
DATA sets the ARINC429 DATA field width to 19 bits wide (covering bits 11
through 29 of the 32 bit packet)
SDIDATA sets the ARINC429 DATA field width to 21 bits wide (covering bits 9
through 29 of the 32 bit packet)
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-157
Commands Listed in Alphabetical Order
SDIDATASSM set
s the ARINC429 DATA field width to 23 bits wide (covering
bits 9 through 31 of the 32 bit packet)
Examples
BUS:B1:ARIN
C429A:DATA:FORMAT DATA
sets the ARINC429 DATA field to
19 bits wide.
BUS:B1:ARINC429A:DATA:FORMAT? might return SDIDATASSM, indica
ting
that the ARINC429 DATA field is 23 bits wide.
BUS:B<x>:ARINC429A:POLarity
This command sets the polarity of the ARINC429 bus (normal or inverted).
Conditions
This command requires installation of a DPO4AERO application module for
MDO4000C models, or MDO3AERO for MDO3000 models.
Group
Bus
Syntax
BUS:B<x>:ARINC429A:POLarity {NORMal|I
NVERTed}
BUS:B<x>:ARINC429A:POLarity?
Related Commands
TRIGger:A:BUS:B<x>:ARINC429A:CONDition
SEARCH:SEARCH<x>:TRIGger:A:BUS:B<x>:ARINC429A:CONDition
BUS:B<x>:ARINC429A:SOUrce
Arguments
NORMal - A positive differential pulse in the first half of a bit period that then
returns to zero differential represents a 1 on the differential source.
INVERTed - A positive differential pulse in the first half of a bit period that then
returns to zero differential represents a 0 on the differential source.
Examples
BUS:B1:ARINC429A:POLarity INVERTED sets the polarity so that a positive
differential pulse in the first half of a bit period that then returns to zero differential
represents a 0 on the differential source.
BUS:B1:ARINC429A:POLarity? might return NORMAL.
BUS:B<x>:ARINC429A:SOUrce
This command specifies the source for the differential input for the ARINC429
bus.
2-158 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual