Boonton 4540 Peak Power Meter User Manual - Manual (Page 42)

Boonton 4540 Series RF Power Meter
Getting Started 3-14
3.5 Calibration
Before any pulse measurements can be acquired with the 4540 Series, a peak power sensor must be connected from the
instrument to the built-in or external calibrator, and calibrated. Making measurements with a CW sensor can be accomplished
without calibration. However, it is recommended that autocalibration be performed for optimal performance for CW sensors
as well. RF voltage probes do not require autocalibration. The following steps will guide the operator through the calibration
process. This explanation covers a single channel configuration with a peak power sensor using the internal calibrator. If a
second channel and sensor is available, repeat the steps for channel 2.
Note If a peak power sensor was just connected to the instrument or the instrument was just turned
on, please wait at least 15 minutes for the instrument to warm up before autocalibration. CW
sensors do not require a warm-up period
Also, if the sensor has been previously calibrated on this instrument and channel, the 4540
will remember the calibration and apply the result. If this is the case, the ―Sens1|2 Needs Cal‖
message will not appear. Instead, normal operation will begin. You may want to continue with
the steps following to learn the calibration procedure.
STEP
PROCEDURE
1. Connect a Boonton Peak Power sensor to the instrument’s CHANNEL_ input using the supplied cable. The cable
will have a silver multipin connector on each end. To connect the cable, align the red dots between the connector
and sensor and insert. Once the connector clicks into place, the cable will not pull out without sliding the barrel of
the connector away from the connection point. The other end of the cable connects to the measurement channel (1)
input connector as identified in Figure 3-1 item 13.
2. Connect the sensor to the "N" connector for the internal calibrator as identified by Figure 3-1 item 9.
3. Press Menu key. This sets the menu to the top level.
4. Select Channel > Channel 1|2 (for single channel units select Channel 1) . Verify the selected channel is on. If
not, turn the channel on by selecting the On/Off menu soft key.