Tektronix 11A32 User's Reference Manual page 17

Operating the 11A32 in 11300-series mainframes
The Position control has a range of plus and minus four divisions from graticule
center, but the Offset control has a range defined in volts. Offset can be as much
as 1000 divisions at 1 mV/division. The Offset control range is one volt for all
sensitivities from 1 mV to 99.5 mV/division, but increases to 10 volts for
sensitivities from 100 mV to 995 mV/division. For sensitivities from 1 volt to 10
volts/division. Offset control range increases to 100 volts.
The 11A32 attempts to maintain the user-selected offset voltage even though the
offset range changes due to a change in sensitivity. An offset voltage of less than
one volt will be maintained as the sensitivity is changed over the entire range of
1 mV/division to 10 V/division. A selected offset of greater than one volt is
beyond the offset range for the most sensitive settings and will be reset to one
volt when the sensitivity is increased to any value between 99.5 mV and
1 mV/division.
HF Limit
Two four-pole (24 dB/octave) bandwidth limit (low-pass) filters are available for
each 11A32 channel. The purpose of these filters is to reduce the amplitude of
unwanted noise or interference occurring at frequencies above the frequency of
the signal of interest. The user has a choice of cut-off (-3 dB) frequencies, either
20 MHz or 100 MHz, independently for each channel. The trigger, auxiliary
trigger, and display signal bandwidths for a channel are always the same. The
auxiliary trigger is the signal sent to the right plug-in compartment.
11A32 User Reference Supplement
2-3