Keysight Technologies 85054B User's And Service Manual

3-20 85054BUse, Maintenance, and Care of the DevicesUsing the Sliding LoadUsing the Sliding LoadWhen performing a sliding load calibration, it is recommended that the sliding ring be set at themarked positions (rings) along the sliding load body. Using the set marks ensures that a broaddistribution of phase angles is selected, thereby optimizing the calibration.The set marks function as detents so that the internal center of the sliding ring can mate withthem. Because of this, the set mark being used cannot be seen but is felt as the sliding ring ismoved from mark to mark during a calibration. Moving the sliding ring with only the indexfingers of both hands will increase your ability to detect the sliding ring detent at each position.NOTE The sliding load uses a plastic bead to support its center conductor when it isstored. Remove this support bead from the sliding load before you connect theload for use. Reinsert this support bead when you are finished using the slidingload.Preferred Method:1. Move the sliding ring forward as far as possible toward the connector end of the load.2. Move the sliding ring back until you feel it detent at the first set mark.3. Follow the network analyzer instructions to measure the sliding load at each detent position.NOTE After a calibration has begun, always move the sliding ring toward the centerconductor pullback end of the sliding load. If you slightly overshoot the desiredmark by less than 0.5 mm (0.02 inch), do not move the sliding ring, but continuewith the calibration as if the sliding ring is set to the proper position. If the slidingring is moved toward the connector end of the load during the calibrationsequence, the calibration may be unstable and poor measurements may result. Ifthe desired position is overshot by more than 0.5 mm (0.02 inch), restart thecalibration sequence from step 1.It does not matter if you start with the slide at the front and move it backwards, orstart at the back and move it forward. To minimize stability errors, it is important tostart at one end and move it in the same direction for each of the measurementsteps.This manual contains limited information about a sliding load calibration. For detailedinformation on this calibration using a VNA, ENA or PNA series network analyzer, refer to theappropriate user guide or online Help.• To view the ENA or PNA online Help, press the Help key on the front panel of the networkanalyzer.• To view an online VNA user guide, use the following steps:1. Go to www.keysight.com.2. Enter your VNA model number (Ex: N5242A) in the Search box and click Search.