Cambium Networks PTP 820 Series, Installation Manual

Page: 61 / 179

Installation Guide for RFU-D-HP
Page 61 of 179
Torque Requirements
When tightening the captive screws, use 20 Nm torque for radio-antenna, radio-mediation device, and mediation
device-antenna connections. In order to avoid misalignment, screws should be tightened progressively.
For installing the diplexer unit on the radio, use 5 Nm torque.
When fastening a waveguide to the radio or mediation device, use the following torque, according to frequency and
screw type:
•
4-5 GHz: M6: 10 Nm
•
6 GHz: M5/#10-32: 3.5 Nm
•
7/8-11 GHz: M4/#8-32: 2.5 Nm
In addition, when connecting the diplexer to the radio and the radio to the mediation device, screws should be cross-
tightened gradually. In other words, partially tighten one screw, then partially tighten the opposite screw. For example,
if you start with the screw on the upper left, proceed to the screw on the lower right, then the upper right, then the
lower left. Tighten each screw partially, then in the same order, tighten the screws further until each screw is fully
tightened.