MDO3000 Programmer Manual.pdf - 第622页
Commands Listed in A lphabetical Order Arguments INTERnal speci fies to use the internal 10 MHz crystal o scillator as the time base reference. EXTernal specifies to use a user-supplied external signal as the time base ref…
Commands Listed in Alphabetical Order
Syntax
RF:WINdow
{RECTangular|HAMming|HANning|BLAckmanharris|KAIser|FLATtop}
RF:WINdow?
Arguments
RECTangular — window function equivalent to multiplying all gate data by one
(sometimes known as a Dirichlet window).
HAMming — a high or moderate resolution window based on a cosine series.
HANning — a high or moderate resolution window based on a cosine series.
BLAckmanharris — a low-resolution (high dynamic range) window based on a
cosine series.
KAIser — a high or moderate resolution window.
FLATtop — a low-resolution (high dynamic range) window.
Examples
RF
:WINdow BLA
sets the window to BLAckmanharris.
RF:WINDOW? KAISER indicates that the window function is set to the default,
K
aiser.
ROSc:SOUrce
This command specifies the source for the time base reference oscillator. The
reference oscillator locks to this source. Depending on the command argument
that you specify, you can use an external reference or use the internal crystal
oscillator as the time base reference.
This command is also useful for synchronizing multiple instruments.
NOTE. If using an external oscillator, its input frequency variation tolerance
needs to be 10MHz +- 1% (ie. 9.9 MHz to 10.1MHz) and 7Vp-p maximum voltage.
Conditions
Available for 4000 series models only. For MDO3000, this query always returns
UNLOCKED.
Group
Miscellaneous
Syntax
ROSc:SOUrce {INTERnal|E XTernal}
ROSc:SOUrce?
Related Commands
ROSc:STATE?
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-591
Commands Listed in Alphabetical Order
Arguments
INTERnal speci
fies to use the internal 10 MHz crystal oscillator as the time
base reference.
EXTernal specifies to use a user-supplied external signal as the time base
reference.
Examples
ROSC:SOURCE? might return INTERNAL, indicating that the 10 MHz crystal
oscillator is being used as the time base reference.
ROSc:STATE? (Query Only)
This query returns an enumeration value that indicates the lock state of the
reference oscillator specified by the
ROSc:SOUrce command. The values
returned are
LOCKED or UNLOCKED.
Group
Miscellaneous
Syntax
ROSc:STATE?
Related Commands
ROSc:SOUrce
Examples
ROSC:STATE? might return LOCKED, indicating that the time base reference is
locked.
*RST (No Query Form)
Resets the oscilloscope to the factory default settings. The *RST command does
not alter the following:
Calibration data that affect device specifications
The Output Queue
The Service Request Enable Register setting
The Power-on status clear flag setting
Alias definitions
Stored settings
The *PUD? Response
Any of the values associated with the DATA command.
Oscilloscope password
2-592 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Group
Status and Erro
r
Syntax
*RST
Related Commands
FACtory,
RECAll:SETUp,
SAVe:SETUp,
*PSC,
*RCL,
*SAV
Arguments
None
Examples
*RST resets the oscilloscope settings to factory defaults.
*SAV (No Query Form)
Stores the state of the oscilloscope to a specified memory location. You can use
the *RCL command to restore the oscilloscope to this saved state at a later time.
Group
Save and Recall
Syntax
*SAV <N R1>
Related Commands
*RCL, RECAll:SETUp,
SAVe:SETUp
Arguments
<NR1> specifies a location in which to save the state of the oscilloscope. Location
values range from 1 through 10. Using an out-of-range location value causesan
execution error. Any settings that have been stored previously at this location
will be overwritten.
Examples
*SAV 2 saves the current oscilloscope state in memory location 2.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-593