Fluke 8558A - Connect a Power Sensor to a Unit under Test; Set the Measurement Frequency

8588A/8558A
Operators Manual
54
Connect a Power Sensor to a Unit Under Test
WCaution
To prevent damage to the Product:
• Never exceed the maximum RF power limit. Even brief
overloads can destroy the sensor. See Specifications.
• Do not touch the RF connector inner conductor. The power
sensor contains components which can be destroyed by
electrostatic discharges.
To connect a power sensor to a DUT:
1. Remove the plastic protection cap from the sensor RF input connector and
save it for future use.
2. Ensure the DUT output is either OFF or at a safe RF level, and then connect
the sensor RF input connector to the output of the DUT.
3. For a NRP sensor fitted with a 2.92 mm RF connector, torque the connector
to 0.49 Nm (4 in-lb) with a torque wrench. If another compatible sensor with a
different RF connector type is used, tighten to a torque appropriate for that
type of connector.
Note
The NRP power sensors have a type of ball-bearing RF connector.
The friction with this design is considerably less than with
conventional RF connectors, and a repeatable connection is ensured
even at relatively low torques. When tightened to the correct torque,
the sensor body may still rotate. Do not try to prevent this by
increasing the torque above the permissible value or by attempting
to tighten the connection by turning the sensor body.
Set the Measurement Frequency
For valid measurements, the frequency setting must correspond to the frequency
of the signal to be measured. To set the frequency, use the navigation keys to
select that field. Enter the frequency with the numeric keypad. The allowable
frequency values are determined by the connected sensor and generally include
0 Hz.