Signal Connections
Two high-impedance signal probes are internally attached to the
212. These probes provide a one-megohm input impedance and a
shielded input cable to prevent pickup of electrostatic interference.
Without the use of a probe attenuator, the vertical deflection factors
can be read directly from the appropriate VOL TS/DIV switch.
Signals can be connected to the EXT TRIG banana jack with
short unshielded leads under most conditions. Be sure to establish
a common ground between the 212 and the equipment under test.
Attempt to position the unshielded leads away from any source of
interference to avoid errors in triggering. If interference is excessive
with unshielded leads, use a coaxial cable with a suitable adapter.
13
212 Operators Handbook
