Exalt EX-11s, Руководство по установке и управлению, Страница: 83 / 103

Exalt Installation and Management Guide
s-Series Digital Microwave Radios
201511 75
2008-02-27
alignment. Familiarity with the RSL voltage can be obtained and other Exalt GUI functions
performed.
For a more predictable RSL, antennas can be properly aligned using small antennas separated as
much as allowable in your environment. Start with the output power set to minimum.
Note: Do not to create an RSL higher than the maximum specified RSL for the radio.
To verify the RSL, use ExaltCalc to predict the proper RSL to match this shortened test path length.
If the target RSL is verified at both ends of the link, the transmitters and receivers on both sides of the
link are operating to specification.
Monitoring the RSL level near the link outage point also verifies threshold specification performance.
Misalign the antennas slowly to drop RSL until the radio link is dropped.
Back-to-Back Bench Test
For back-to-back bench tests, the following items are required:

Radio pair s-Series radios (two IDUs and two ODUs)

Power source

Two remote mounts for ODUs

Two waveguide-to-coax transitions (generally, on the coaxial side these are SMA connectors)

Low-loss coaxial cable with matching connectors or adapters to the coax transitions and
attenuators; length is dependent on your test environment

Coaxial attenuators rated at the operating frequency for the radio; a minimum of 40dB and up to
90dB total to facilitate a full-threshold test

Low-loss coaxial cable with matching connectors or adapters to the coax transitions and
attenuators
Connect the items as follows (see Figure 43):
1. Connect the ODUs to the remote mounts.
2. Connect the waveguide-to-coax transitions to each ODU.
3. Divide attenuators and coaxial cable in-between with roughly equal attenuation connected to each
transition.
4. Insert 40dB attenuation to start with and increase attenuation while performing threshold testing.
5. Apply power to one IDU.
6. Connect a computer to access the browser-based Exalt GUI.
Follow the instructions in the Quick Start Guide or Configuration and Management .
7. Set the radio output power to minimum.
8. Set the radio frequency pair, bandwidth, and Mode.
The radio should establish the link. Full-link configuration and interface testing can now be
performed. RSL can also be compared to expected results. Insert additional attenuation and increase
the output power to perfect threshold performance.