Root (:) Commands 6
Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide 211
:OVLenable (Overload Event Enable Register)
(see page 1138)
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 M
Ω 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 75 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.
2 Channel 3 OVL Event when overload occurs on Channel 3 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