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3.6.4 Instrument Preset Device (IP)
The Instrument Preset (IP) device dependent command aborts any measurement in progress,
clears all buffers and registers, and returns all functions to the default condition.
Table 3.5 provides the instrument preset condition for the 2251A following the device-
dependent command (IP).
2251A DEFAULT FUNCTION
Frequency A
Trigger Levels
Manual, Set to 0.00 V
Input Coupling
AC, Inputs A and B
Inputs A and B Impedance,1 MS
Inputs A and B Input Attenuation,
X1
Input A Low Pass Filter Off
Input A and B Trigger Slope,
Positive
Input Mode, A and B Separate
Math Constants
X=0, Y=1, Z=1, Math Disabled
Continuous Measurement Mode
SRQ Assertion Disabled
Time Interval Delay
200 Fs, Disabled
Source, Front Panel
Reference CLK10
Gate Output Disabled
External Arm, Front Panel
Arm Internal
3-8
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Table 3.5 - Instrument Preset Conditions
COMMANDS
FA
AMN, BMN
AAC, BAC
AHI, BHI
AAD, BAD
AFD
APS, BPS
BCS
MD
T0
Q0
DD
A0
B0
D8
R8
S10
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