MDO3000 Programmer Manual.pdf - 第333页
Commands Listed in Alphabetical Order Arguments <NR3> i safl o a t i ng point number that specifies the position o f the digital channel, in slot units. Use the oscilloscope front-panel controls to place the chan nel…
Commands Listed in Alphabetical Order
D<x>:LABel
This command specifies the waveform label for digital channel <x>, where x
is the channel number.
Conditions
Requires an MSO or MDO4000/B/C model, or MDO3000 with option
MDO3MSO installed.
Group
Vertical
Syntax
D<x>:LABel <Qstring>
D<x>:LABel?
Arguments
<Qstring> is an alphanumeric string of text, enclosed in quotes, that contains the
text label information for the digital channel <x> waveform. The text string is
limited to 30 characters.
Examples
D4:LABEL? might return :D4:LABEL “Clk Wfm 4”.
D<x>:POSition
This command specifies the vertical position for digital channel <x>, wherex
is the channel number.
NOTE. Unlike analog channels, which use the center baseline as the zero point,
digital channels use the bottom logic level as the zero point. Because of the slot
model used to describe digital channel position, the oscilloscope rounds off
divisions to the nearest slot.
Conditions
Requires an MSO or MDO4000/B/C model, or MDO3000 with option
MDO3MSO installed.
Group
Vertical
Syntax
D<x>:POSition <NR3>
D<x>:POSition?
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Commands Listed in Alphabetical Order
Arguments
<NR3> isafloati
ng point number that specifies the position of the digital channel,
in slot units. Use the oscilloscope front-panel controls to place the channel; then
query the channel to obtain an exact value for the position.
D<x>:THResh
old
This command specifies the logical threshold for the digital channel <x>, where x
is the digital channel number D0 – D15.
NOTE. MDO3
000 models only have two digital threshold controls: one for digital
channels D0 - D7, and the other for D8 - D15. Changing one digital channel’s
threshold l evel changes all of the channels’ levels in the same set.
Conditions
Requires an MSO or MDO4000/B/C model, or MDO3000 with option
MDO3MSO installed.
Group
Vertical
Syntax
D<x>:THReshold {ECL|TTL|<NR3>}
D<x>:THReshold?
Arguments
ECL sets the digital threshold for channel <x> to a preset ECL high level of -1.3V.
TTL sets the digital threshold for channel <x> to a preset TTL high level of 1.4V.
<NR3> is a floating point number that specifies the digital threshold for channel
<x>, in volts.
Examples
D5:THRESHOLD ECL sets the threshold for D5 digital channel to ECL levels.
D14:threshold? might return :D14:THRESHOLD 1.2500 indicating that the
threshold level for the D14 digital channel is 1.25 volts.
*ESE
Sets and queries the bits in the Event Status Enable Register (ESER). The
ESER prevents events from being reported to the Status Byte Register (STB).
For a detailed discussion on how to use registers, see Registers. (See page 3-1,
Registers.)
Group
Status and Error
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-303
Commands Listed in Alphabetical Order
Syntax
*ESE <N R1>
*ESE?
Related Commands
*CLS, DESE, *ESR?, EVENT?, EVMsg?, *SRE, *STB?
Arguments
<NR1> speci
fies the binary bits of the ESER according to this value, which ranges
from 0 through 255.
The power-
on default for the ESER is 0 if *PSC is 1. If *PSC is 0, the ESER
maintains the previous power cycle value through the current power cycle.
NOTE. Setting the DESER and the ESER to the same values allows only those
codes to be entered into the Event Queue and summarized on the ESB bit (bit 5) of
the Status Byte Register. Use the DESE command to set the DESER.
Exampl
es
*ESE 209 sets the ESER to binary 11010001, which enables the PON, URQ,
EXE, and OPC bits.
*ESE? might return 186, showing that the ESER contains the binary value
10111010.
*ESR? (Query Only)
Ret
urns the contents of the Standard Event Status Register (SESR). *ESR? also
clears the SESR (reading the SESR clears it). For a detailed discussion on how to
use registers, see Registers. (See page 3-1, Registers.)
Group
Status and Error
S
yntax
*ESR?
Related Commands
ALLEv?, *CLS, DESE, *ESE, EVENT?, EVMsg?, *SRE, *STB?
Examples
*ESR? might return 213, showing that the SESR contains the binary value
11010101.
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