English
Page
3
Operation
To operate the 85RF II Probe:
1. Connect the Probe output to a compatible voltmeter with
an applicable shunt (if necessary.) The Probe’s output low
must be connected to voltmeter low.
2. Set a voltage range (1 V dc reading for each 1 V rms
Probe input).
3. Connect the input low (clip lead or tip shield) to earth
ground.
WX
Warning
Input low is intended to be connected to earth
ground. To prevent electrical shock, input low
(clip lead or tip shield) must be connected to
potentials of less than 30 V ac, 42 V peak, or
60 V dc.
Frequency Measurements
Frequencies less than 100 MHz
To measure frequencies less than 100 MHz:
1. Ground the 4-inch clip lead supplied with the Probe.
2. Touch the Probe tip to the circuit under test.
Frequencies greater than 100 MHz
To measure frequencies greater than 100 MHz:
1. Ground the 4-inch clip lead supplied with the Probe.
2. Touch the Probe tip to the circuit under test.
Note
Measurements above 100 MHz must be made with
minimum cable lengths and a terminated 50
e
system.
One inch or less of non-terminated coaxial cable (such as
a BNC adapter and 50
e
termination) is required for
measurements up to 300 MHz.
Frequencies greater than 300 MHz
To measure frequencies greater than 300 MHz:
1. Ground the 4-inch clip lead supplied with the Probe.
2. Touch the Probe tip to the circuit under test.
Note
Measurements above 300 MHz must have the Probe tip
and tip shield (input high and low) touch the circuit under
test to realize the rated accuracy of the Probe. Lead
lengths less than 1-inch can cause substantial errors.