LeCroy DA1855A Operation page 11

DA1855A-OM-E Rev A
Table 3-2. V Range for Different Gain and Attenuator Settings
DIFF
Gain
X1
X1
X10
X10
When using readout encoded probes which the DA1855A
senses, the PVG readout calculates the effective differential
offset at the probe tip. Of course, both probes must have the
same attenuation factor.
In the V mode, the maximum OFFSET VOLTAGE input is
COMP
limited by the DA1855A common mode dynamic range. In the
V mode it is limited by the dynamic range of the internal V
DIFF
amplifier.
Tables 3-3 and 3-4 will help the operator stay within the maximum
input voltage limits and understand the relationship between the
actual voltage applied and the effective voltage. Effective voltage
is always referred to the input of the DA1855A or the probe tip if a
probe is used. When using probes, the maximum effective
voltage range may be limited by the maximum voltage rating of
the probe.
Table 3-3. Effective Offset Range with
Front panel
Settings
Gain Attenuation
X1
X1
X10
x10
ISSUED: July 2002
Attenuation
1
10
1
10
Effective Offset
V
COMP
1 ± 15.5 V
10 ± 155 V
1 ± 15.5 V
10 ± 155 V
Operation
Max. V
DIFF
± 10 V
± 100 V
± 1 V
± 10 V
DIFF
Probe
Range
V
DIFF
± 10 V
± 100 V
± 1 V
± 10 V
3-11