MDO3000 Programmer Manual.pdf - 第935页
Commands Listed in Alphabetical Order Arguments <NR3> i safl o a t i ng point number that specifies the threshold voltage, i n volts. ECL specifies a preset ECL high level of –1.3V . TTL specifies a prese t TTL high le…
Commands Listed in Alphabetical Order
TRIGGER:A:SET
HOLD:SETTIME?
might return
:TRIGGER:A:LOGIC:SETHOLD:SETTIME 2.0000E-09 indicating that the
current setup time for setup and hold trigger is 2 ns.
TRIGger:A:S
ETHold:THReshold:CH<x>
This command specifies the threshold for the analog channel <x>. x can be 1–4.
All trigger types using the channel are affected.
Group
Trigger
Syntax
TRIGger:A:SETHold:THReshold:CH<x> {<NR3>|ECL|TTL}
TRIGger:A:SETHold:THReshold:CH<x>?
Arguments
<NR3> is a floating point number that specifies the threshold voltage, 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:SETHOLD:THRESHOLD:CH1 1.5 sets the channel 1 threshold
to 1.5 volts.
TRIGGER:A:SETHOLD:THRESHOLD:CH1? might return
TRIGGER:A:SETHOLD:THRESHOLD:CH1 0.0E+0 indicating the
channel 1 threshold is set to 0.0 volts.
TRIGger:A:SETHold:THReshold:D<x>
This command sets the threshold for the specified digital channel. <x> can beD0
- D15. All trigger types using the digital channel are affected.
NOTE. MDO3000 models only have two digital threshold controls: o ne for d igital
channels D0 - D7, and the other for D8 - D15. Digital channel trigger l
evels
cannot be set independently for these models. Changing one digital channel’s
threshold level changes all of the channels’ levels in the same set.
Group
Trigger
Syntax
TRIGger:A:SETHold:THReshold:D<x> {<NR3>|ECL|TTL}
TRIGger:A:SETHold:THReshold:D<x>?
2-904 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Arguments
<NR3> isafloati
ng point number that specifies the threshold voltage, 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:SETHOLD:THRESHOLD:D1 ECL sets the threshold to ECL levels.
TRIGGER:A:SETHOLD:THRESHOLD:D1? might return
TRIGGER:A:SETHOLD:THRESHOLD:D1 -1.3000 indicating the
threshold is set to -1.3 volts.
TRIGger:A:TIMEOut:POLarity
When triggering using the TIMEOut trigger type, this commands specifies
the polarity to be used. The timeout trigger type is sel
ected using
TRIGger:A:PULse:CLAss TIMEOut.
Group
Trigger
Syntax
TRIGger:A:TIMEOut:POLarity {STAYSHigh|STAYSLow|EITher}
TRIGger:A:TIMEOut:POLarity?
Related Commands
TRIGger:A:TIMEOut:SOUrce
TRIGger:A:TIMEOut:TIMe
TRIGger:A:PULse:CLAss
Arguments
STAYSHigh — Trigger when the polarity stays high during the timeout time
specified by the command TRIGger:A:PULse:CLAss.
STAYSLow — Trigger when the polarity stays low during the timeout time
specified by the command TRIGger:A:PULse:CLAss.
EITher — Trigger when the polarity is either high or low.
Examples
TRIGger:A:TIMEOut:POLarity STAYSHigh specifies to trigger when the
polarity stay high during the timeout time when triggering using the TIMEOut
trigger type (selected using TRIGger:A:PULse:CLAss TIMEOut).
TRIGger:A:TIMEOut:POLarity? might return EITHER, indicating that the
polarity doesn’t matter when triggering using the TIMEOut trigger type.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-905
Commands Listed in Alphabetical Order
TRIGger:A:TI
MEOut:SOUrce
When triggering using the TIMEOut trigger type, this command specifies the
source. The available sources are live channels, the digital channels, theAux
Input connec
tor (MSO/DPO 4000B series models, MDO4000C series models
without an RF option, and 2-channel MDO3000 models), or RF power level
(MDO4000/B/C only). The default is channel 1. The timeout trigger type is
selected using TRIGger:A:PULse:CLAss TIMEOut.
Group
Trigger
Syntax
TRIGger:A:TIMEOut:SOUrce {CH1|CH2|CH3|CH4|LINE|AUX|
D0|D1|D2|D3|D4|D5|D6|D7|D8|D9|D10|D11|D12|D13|D14|D15|RF}
TRIGger:A:TIMEOut:SOUrce?
Related Commands
SEARCH:SEARCH<x>:TRIGger:A:TIMEOut:SOU
rce
TRIGger:A:TIMEOut:TIMe
TRIGger:A:TIMEOut:POLarity
TRIGger:A:PULse:CLAss
Arguments
CH1–4 specifies an analog channel as the timeout trigger source.
AUX specifies an external trigger using the Aux In connector located on the front
panel of the oscilloscope. (For MSO/DPO 4000B series models, MDO4000C
series models without an RF option, and 2-channel MDO3000 models only.)
LINE specifies the AC line as the timeout trigger source.
D0–D15 specifies a digital channel as the timeout trigger source.
(MSO/MDO4000/B models only as well as MDO3000 and MDO400C models
with option MDO3MSO or MDO4MSO installed.)
RF specifies that the internal RF power level can be used as the timeout trigger
source. (MDO4000/B/C models only, and requires installation of an MDO4TRIG
application module.)
Examples
TRIGger:A:TIMEOut:SOUrce CH4 specifies to use channel 4 as the source
for the timeout trigger.
TRIGger:A:TIMEOut:SOUrce? might return CH1, indicating that channel 1 has
been set as the source for the timeout trigger.
2-906 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual