4RF Aprisa XE User Manual - page 45
Mounting and Installing the Terminal | 43
Aprisa XE User Manual
Bench Setup
Before installing the link in the field, it is recommended that you bench-test the link. A suggested setup
for basic bench testing is shown below:
When setting up the equipment for bench testing, note the following:
Earthing—the terminal should be earthed at all times. The terminal earth stud must be connected to a
protection earth.
Attenuators— In a bench setup, there must be 60 - 80 dB at up to 3 GHz of 50 ohm coaxial attenuation
(capable of handling the transmit power of +35dBm) between the terminals’ N type antenna
connectors.
This can be achieved with two fixed attenuators fitted to the antennas 'N' connectors and a variable
attenuator with a ≥ 60 dB range. You can use other attenuator values as long as you consider the
transmit power output level (max +33 dBm) and the receiver signal input (max -20 dBm).
Cables—use double-screened coaxial cable that is suitable for use up to 3 GHz at ≈ 1 metre.
CAUTION: Do not apply signals greater than -20 dBm to the antenna connection as they can damage the
receiver.