Technical data

Root (:) Commands 6
Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide 177
:OVLRegister (Overload Event Register)
(see page 860)
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

input, the input will automatically switch to 1 M
 input impedance. A "1"
indicates an overload has occurred.
Return Format
<value><NL>
NOTE
You can set analog channel input impedance to 50 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
.
Table 66 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