Root (:) Commands 6
Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide 213
:OVLRegister (Overload Event Register)
(see page 1138)
Query Syntax
:OVLRegister?
The :OVLRegister query returns the overload protection value stored in the
Overload Event Register (OVLR). If an overvoltage is sensed on a 50
Ω
input, the input will automatically switch to 1 M
Ω input impedance. A "1"
indicates an overload has occurred.
Return Format
<value><NL>
You can set analog channel input impedance to 50Ω on the 300 MHz, 500 MHz, and 1 GHz
bandwidth oscilloscope models. On these same bandwidth models, if there are only two
analog channels, you can also set external trigger input impedance to 50
Ω.
Table 76 Overload Event Register (OVLR)
Bit Description When Set (1 = High = True), Indicates:
15-10 --- (Not used.)
9 Channel 4 Fault Fault has occurred on Channel 4 input.
8 Channel 3 Fault Fault has occurred on Channel 3 input.
7 Channel 2 Fault Fault has occurred on Channel 2 input.
6 Channel 1 Fault Fault has occurred on Channel 1 input.
5-4 --- (Not used.)
3 Channel 4 OVL Overload has occurred on Channel 4 input.
2 Channel 3 OVL Overload has occurred on Channel 3 input.
1 Channel 2 OVL Overload has occurred on Channel 2 input.
0 Channel 1 OVL Overload has occurred on Channel 1 input.
98101112131415
To OVLR bit in
Operation Status
Register

OR
10234567
:OVLR?
Overload Event Register
:OVL
:OVL?
Overload Event Enable
(Mask) Register
Ch a n 2
OVL
Ch a n 1
OVL
Ch a n 3
OVL
Ch a n 4
OVL
Ch a n 2
Fault
Ch a n 1
Fault
Ch a n 3
Fault
Ch a n 4
Fault
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