Socket-End 10 Cm Resistive Signal Lead And Solderable Smt Or Solderable Through-Hole Ground Pin - Agilent Technologies 1156A User Manual

Socket-end 10 cm Resistive Signal Lead and Solderable SMT or Solderable Through-
Socket-end 10 cm Resistive Signal Lead and Solderable SMT
or Solderable Through-hole Ground Pin
This configuration is used to attach the probe to a round pin of a header, a square
pin of a header, or a soldered in pin. This configuration produces a probing
bandwidth of 850 MHz or rise time of 410 ps.
Figure 2-1
Solderable through-hole ground pin
Probing using the socket-end 10 cm resistive signal lead
Either ground pin can be used. Also, if you need to bend the pin you can do this
one time without breaking the signal pin where it enters the probe. Be sure to
remove the pin from the probe before you bend it.
When using this configuration, always make the ground connection as short as
possible. Length in the ground connection makes the response of the probe
dependent on the position of the probe, the position of probe cable and many
other variables, hence it makes the response of the probe unrepeatable. Also,
keep the signal wire away from AC ground, other components, or your fingers.
The damping resistor is optimized assuming that the signal wire is far from AC
ground. The properly damped 10 cm wire with a very short ground connection
produces a high quality, repeatable 850 MHz probe.
The 1156A probe has an input impedance which varies with frequency. The
following schematic shows the circuit model for the input impedance of the probe
when using the socket-end 10 cm resistive signal lead and a solderable smt or
through-hole ground lead.
Socket-end 10 cm
resistive signal lead
Operating the Probe
hole Ground Pin
33