286 Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
7 Root (:) Commands
:OVLenable (Overload Event Enable Register)
(see page 1610)
Command Syntax
:OVLenable <enable_mask>
<enable_mask> ::= 16-bit integer
The overload enable mask is an integer representing an input as described in the
following table.
The :OVLenable command sets the mask in the Overload Event Enable Register
and enables the reporting of the Overload Event Register. If an overvoltage is
sensed on a 50
Ω input, the input will automatically switch to 1 MΩ input
impedance. If enabled, such an event will set bit 11 in the Operation Status
Register.
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 92 Overload Event Enable Register (OVL)
Bit Description When Set (1 = High = True), Enables:
15-10 --- (Not used.)
9 Channel 4 Fault Event when fault occurs on Channel 4 input.
8 Channel 3 Fault Event when fault occurs on Channel 3 input.
7 Channel 2 Fault Event when fault occurs on Channel 2 input.
6 Channel 1 Fault Event when fault occurs on Channel 1 input.
5-4 --- (Not used.)
3 Channel 4 OVL Event when overload occurs on Channel 4 input.
98101112131415
To OVLR bit in
Operati on 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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