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Operation and Reference
AC with DC Offset
^^en dc offset is added to any ac function, there are minimum and maximum offset limits
which must be observed These limits are affected by the ac voltage and internal attenuator
settings, listed m table 1-7. Figure 1-2 contains a set of graphs which show the approximate
m^irnum dc offset permissible for a given ac peak-to-peak voltage. Resolution of a dc offset
entry (with ac function) is determined by the resolution of the ac amplitude. The following
equation may be used to determine maximum offset voltage:
Maximum dc offset = (S ^ A) - (Amptd
2)
Where A = Attenuation factor (from table 1-7)
Amptd = Amplitude in Vpp of the ac function.
^ r X
large for the amplitude already programmed is entered or if the ac
amplitude is increased beyond the level where the amplitude and offset are compatible, an
error code between 500 and 503 appears in the display momentarily and the entiy value is
not accepted. The display then indicates the nearest acceptable value.
Table 1-7. Maximum DC Offset with any AC Functions
AC Amplitude
Maximum
Minimum
Entry
(peak-to-peak)
DC Offset
(-
1
- or -)
DC Offset
Entry
Range
Attenuation
Factor
1.000 mV
with
4.500 mV
to
3.333 mV
with
3.333 mV
0.001 mV
7
A= 1000
3.334 mV
with
14.99 mV
to
9.999 mV
with
11.66 mV
0.001 mV
6
A = 300
10.00 mV
with
45.00 mV
to
33.33 mV
with
33.33 mV
0.010 mV
5
A= 100
33.34 mV
with
149.9 mV
to
99.99 mV
with
116.6 mV
0.010 mV
4
100.0 mV
with
450.0 mV
to
333.3 mV
with
333.3 mV
0.100 V
3
A = 10
333.4 mV
with
1.499V
to
999.9 mV
with
1.166 mV
0.100 V
2
1.000 V
with
4.500 V
to
9.998 mV
with
0.001 mV
1.000 mV
1
A= 1
1-18
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