HP 1652B Getting Started Manual page 386

The default value for the
Offset
field
is 2.5 V (TTL preset value).
Offset range and resolution is dependent on vertical sensitivity and
input impedance. See table
23-1.
I
Note m
If acquisitions have been stopped, offset changes will not be reflected
on the waveform until RUN is touched and
the next
acquisition is
displayed.
Probe Field
The Probe field is located on the left side of the middle row of fields. It
sets the probe attenuation factor for
the
channel selected. The probe
attenuation factor can be set from
1:1
to
1OOO:l
in increments of
1.
When the Probe field
is
selected, a pop-up will appear and the probe
attenuation factor can be changed by turning the knob. See the upper
pop-up in figure 23-4.
Probe attenuation can also be entered by using the keypad. An Integer
Entry pop-up will appear when the first key is touched. See the lower
pop-up in figure 23-4.
Keypad entry pop-up /
[jcape]- Channel
c \ '
In trgar En try (Done)
-
\ )
Figure 23-4. Probe Attenuation
Entry Pop-ups
When you select a probe attenuation factor, the actual sensitivity at the
input does not change; The voltage values used on the display (V/div,
offset, marker values, trigger level, automatic measurements) are
adjusted to reflect the attenuation factor.
The default value for the Probe field is
1O:l
for
1O:l
divider probes.
Channel Menu
HP 1652B/1653B
23-4 Front-Panel Reference