Tektronix, Inc. P6240, Руководство пользователя

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TLS 216 User Manual
3–97
Probing of Circuits
This article describes the P6240 FET probe that is shipped with the TLS 216
Logic Scope as a standard accessory. The P6240 probe, when matched with other
accessories shipped with the logic scope, can be connected in a variety of
configurations to couple signals to the logic scope. Read this article to learn:
H
how to install the probe and connect it to circuits.
H
how to install the accessories used with the probe and the purpose of those
accessories.
The P6240 probe maintains high-input resistance (about 1 M
W
) while offering
low input capacitance (2.5 pF typical). These input characteristics make the
P6240 well suited for taking accurate timing and phase measurements, while
maintaining good amplitude accuracy. The P6240 has a dynamic range of –12 to
+15 V.
To Install the Logic Probe
The P6240 probe connects to two adjacent pins: one signal and one ground. The
pins, if round pins, must be at least 0.020 inch (0.051 cm.) and, if square pins,
can be as large as 0.025 inch (0.064 cm.). They must be spaced 0.100 inch
(0.254 cm.) apart at their centers. To install the probe, do the following tasks:
1. Connect a probe base to any one of the CH 1 through CH 16 inputs. Simply
push the probe into its front-panel receptacle. (See Figure 3-47.)
2. Connect the probe tip between the ground and signal pins. Simply plug the
signal onto the two pins, observing the proper polarity. (See Figure 3-47.)
CAUTION. Never connect more more than four probes with their probe tips
side-by-side on 0.100 inch (0.254 cm.) centers. To do so increases the surface
temperature beyond safe operating limits.
3. To uninstall the probe from the logic scope, simply push the latch button on
top of the base and unplug it from its input channel. To disconnect the probe
tip, simply unplug it while observing the following
CAUTION.