Tektronix 11A32 User's Reference Manual page 30

Operating the 11A32 in 11400-series Mainframes
When the input impedance is set to 50 Q and the input voltage substantially
exceeds 5 Vrms, the 11A32 will sense the overload, disconnect the 50 Q. input
termination and connect the 1 MD termination. The Impedance menu will show
1 MCI, and the mainframe will display the message:
Input channel N overload on LEFT/CENTER/RIGHT plug-in
where N = 1 or 2.
To reset the input impedance to 50 Cl, first correct the overload condition, then
select 50 £2 from the impedance menu.
Using an active probe, such as the P6231, eliminates two options: AC Coupling
and 1 Mil input impedance. Coupling options available when using such a
probe are Off and DC; the only Impedance available is 50 Cl.
The
Probe ID function
is the means of selecting how the 11401 or 11402
responds to an ID button-push of recommended probes. (The
Probe ID
Function
is part of the
Probes
pop-up menu, which is selected from the
Utilities major menu.) All, or some combination of the following operations may
be set to start in response to probe ID buttons. To display the Utility major
menu, press the front-panel UTILITY button. For details, see the Probe Calibration
and ID Function section of the Utilities subsection in the 11401 and 11402 User
Reference Manual
Pressing the probe ID button can initiate one of the following operations:
1. If the
Probe ID function
(in the
Probes
pop-up menu of the Utility major
menu) is set to
Sequence Settings,
the next front-panel setting will be
recalled. If the
Probe ID Function
is not set to
Sequence Settings,
then
operation 2 or 3, which involve a new waveform and waveform selection,
will occur.
If the Sequence Settings option is enabled, front-panel settings can be
sequentially recalled via the Probe ID function. The settings must be stored
as explained under Storing and Recalling Waveforms in the 11401 and 11402
User Reference Manual
3-8
11A32 User Reference Supplement