Tektronix P6249, Instruction Manual

Page: 29 / 76

P6249 4 GHz 5X Active Probe Instruction Manual
17
Operating Basics
Please follow these operating guidelines to get optimum performance
from your P6249.
Handling the Probe
Exercise care when using and storing the P6249. The probe and cable
are susceptible to damage caused by careless use. Always handle the
probe using the compensation box and probe head, avoiding undue
physical strain to the probe cable, such as kinking, excessive
bending, or pulling. Visible dents in the cable will increase signal
aberrations. Do not drop the probe or subject it to physical shock.
Damage to the probe may result.
Maximum Non-destructive Input Voltage
The P6249 is electrically protected against static voltage; however,
applying voltages above its design limits may damage the probe tip
amplifier. Please refer to
Specifications on page 23 for the maximum
operating voltage and frequency derating information.
Input Linear Dynamic Range
The probe head amplifier used by the P6249 has a limited linear
operating range. To keep the input linearity error less than 0.1% you
must limit the apparent signal input voltage to
±
2.0 V.
Use the DC offset adjustment to maintain the probe within its
dynamic range. The nominal offset adjustment range of the P6249 is
±
5.0 VDC. For example: to offset a +2 VDC level in a circuit, set the
offset to +2 V.
NOTE
. The probe can tolerate input voltages of
±
30 V without
damage; however, the linearity error specification does not apply to
input voltages exceeding
±
7.0 V (including any DC offset). See
Figure 1 on page 10.