Tektronix P5210, Instructions Manual

Page: 16 / 84

Operating Basics
14 P5210 Instructions
Operating Characteristics and Probing Techniques
This section explains the operating characteristics of the P5210
High-Voltage Differential Probe along with techniques you can use
to maximize the performance of the probe.
Operating Limits
The P5210 probe has two operating ranges that you select with the
ATTENUATION button on the front panel: 1,000 X and 100X. These
ranges set the maximum differential voltage that can be measured.
In the 100X position, the probe can measure differential voltages
≤
560 V
(DC + peak AC)
.
In the 1,000X position, the probe can measure differential
voltages
≤
5,600 V
(DC + peak AC)
.
Always insure that the input voltages never exceed 2,200 V
RMS
from
either input to ground or 4,400 V
RMS
between the inputs.
Overrange Detection
Differential voltage outside the operating range will overdrive the
circuitry of the probe and distort the output signal. When this
differential overrange occurs, the probe detects the condition and
lights the overrange indicator. With the Audible Overrange ON, the
probe will also emit an audible alarm.
NOTE
. Common-mode voltage greater than 2,200 V can distort the
output signal, but the probe will not indicate an overrange condition.
Common-Mode Rejection
The common-mode rejection ratio (CMRR) is the specified ability of
P5210 probe to reject signals that are common to both inputs. More
precisely, CMRR is the ratio of the differential gain to the common-
mode gain. The higher the ratio, the greater the ability of probe to
reject common-mode signals. For detailed specifications, see
pages 17 and 20.