Using The Sliding Load (Option 001 Only) - Agilent Technologies 85056K Manual

Using the Sliding Load (Option 001 only)

When performing a sliding load calibration, it is recommended that the sliding ring be set
at the marked positions (rings) along the sliding load body. Using the set marks ensures
that a broad distribution 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
with them. Because of this, the set mark being used cannot be seen but is felt as the sliding
ring is moved from mark to mark during a calibration. Moving the sliding ring with only
the index fingers of both hands will increase your ability to detect the sliding ring detent at
each position.
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. You should see
the two uncovered set marks between the back surface of the sliding ring and the center
conductor pullback end of the sliding load.
NOTE After a calibration has begun, always move the sliding ring toward the center
conductor pullback end of the sliding load. If you slightly overshoot the
desired mark by less than 0.5 mm (0.02 inch), do not move the sliding ring,
but continue with the calibration as if the sliding ring is set to the proper
position. If the sliding ring is moved toward the connector end of the load
during the calibration sequence, the calibration may be unstable and poor
measurements may result. If the desired position is overshot by more than
0.5 mm (0.02 inch), restart the calibration sequence from step 1.
To perform a calibration, refer to your network analyzer's user's guide for instructions.
Figure 3-15 Sliding Load Set Marks
85056K
Use, Maintenance, and Care of the Devices
Using the Sliding Load (Option 001 only)
3-31