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Exalt Communications, Inc.
EX-5i Installation & Management
5000005
66
2006-05-17
Figure B-1:
Basic Back-to-Back Bench Test Configuration
After connecting and powering on, the front panel LEDs can be observed to verify that the Link
and Status LEDs are both green. If they are green, the radios are communicating and all radio-
related alarm conditions are normal.
It can be beneficial to have a computer to verify configuration in case of red LEDs or to pre-
configure the radio as desired for operation. Follow the instructions in section 5.
B-3 Specification Performance Verification
The specification performance verification is a more detailed test that allows you to verify that
the radio’s output power and threshold specifications are being met. This is typically a test that
would only be performed in a troubleshooting scenario, but can be performed before installation
if you wish to have a detailed record or be extremely certain of the radio performance before
installation.
This test is identical to the basic test, but in place of the fixed attenuation, it requires the use of
calibrated variable attenuation, or a set of calibrated fixed attenuators, or a combination of both,
adding to a total attenuation value of 120dB, as measured at the operating frequency of the radio
(roughly 5.8 GHz, in this case). In addition, a voltmeter or computer is also required.
Connect the system as in figure B-1, using the combination of fixed and variable attenuation in
between the radio’s RF ports. Connect the voltmeter to either radio’s RSL test point and the
associated reference ground connection.
In this test, it is highly desirable to utilize RF cables that are pre-tested, known good and the
insertion loss is known at the operating frequency. If the cables are short (in the range of 6 feet or
less), you can estimate the loss, including connectors, to be less than 1dB each. The estimate of
cable loss is critical to the overall confidence of the measurements made in this test.
There are two critical specifications that can be tested in this configuration:
-
RF output power
-
Radio receiver threshold
Radio B
Radio A
Attenuation
(60-90dB)
RF Ports
Power
(connect last)
Power
(connect last)
Computer
Console Port
Serial Port