R&S TS7124M - Handling RF Connections & Applying Correct Torque

Configuration
R&S
®
TS7124M
75User Manual 1525.5394.02 ─ 05
7.1 Handling RF connections & applying correct torque
Handling RF connectors and cables correctly and carefully is crucial for system perfor-
mance.
●
Excessive tightening of the coaxial RF connectors can damage the cables and
connectors.
●
Too weak tightening leads to inaccurate measurement results.
Connecting RF cables
For best connections, proceed as follows:
1. Note that 3.5 mm and 2.92 mm PC connectors are incompatible with 2.4 mm and
1.85 mm PC connectors.
2. Carefully align the connectors along a common axis.
3. Mate the connectors along the common axis until the male pin of the inner connec-
tor engages with the female socket of the outer connector.
4. When fastening the connectors, only turn the nut of the outer connector.
Avoid rotating the body of the outer connector.
5. If the inner connector is on a cable, hold it stationary with a spanner.
6. For fastening the connection, use a calibrated torque wrench suitable for the con-
nector type.
Never use a standard open-end wrench.
7. Fasten the nut of the outer connector to the specified torque.
For specifications, refer to application note 1MA99, which is available online at
www.rohde-schwarz.com/appnote/1MA99.
For RF connectors, we recommend applying the following torque limits:
● 150 N·cm for N connectors
● 56 N·cm for SMA connectors
● 90 N·cm for PC connectors (3.5 mm, 2.92 mm, 2.4 mm, 1.85 mm)
Never use a standard open-end wrench. Rohde & Schwarz offers torque wrenches
for various connectors. For ordering information, also refer to the application note
1MA99.
Handling RF connections & applying correct torque