HP 8517B manual Using Anti-Rotation Clamps, Attach the first clamp

NOTE

NOTE

NOTE

Using Anti-Rotation Clamps

During the performance verification procedure, use anti-rotation clamps to secure RF connections at the test ports of each test set. While installed, each clamp stabilizes the connector on RF cable to the large nut on the test set’s RF test port. If an adapter is used, the clamp stabilizes the adapter to the front panel RF port connector.

Without these clamps, the test port connections can loosen when a device under test is moved. As a result, the loosening can invalidate calibrations and measurements.

These instructions refer to an installation using HP RF cables. However, the anti-rotation clamps may also be used with front panel adapters. Adapter installations are similar. There are two anti-rotation clamps included in the test set accessories box.

Attach the first clamp

Remove one anti-rotation clamp from the accessories box. Loosen its thumb-screw until it is nearly freed from the counter-sink socket in the clamp body. The clamp is shown as item (5) in Figure 2-1, “Accessories Supplied with the HP 8517B Test Set.”

1.Gently push the clamp (round-hole end first) over and past the RF cable connector to be used.

2.Fit the rubber O-ring in the round end of the clamp over the connector.

If the O-ring is not snug or is damaged, refer to the Chapter 6, “Replacement Procedures” for instructions about replacing the internal O-ring.

3.Wiggle the clamp to ease it over the connector.

4.Attach the cable to the test port and tighten it as specified in the cable manual.

Do not twist the cable as you attach it to the test port.

Use the torque wrench supplied with your calibration kit to tighten the cable to 90 N-cm (8 in-lb). Do not over-torque the connection. See Figure 3-5.

HP 8517B S-Parameter Test Set Manual 3-15