This video is purely for radio based communication viewers out there wanting to get an idea of the signal clarity and quality of transmission to expect on your mobile setup.
What was I testing? Whether GMRS UHF communications suffered at highway speeds (75+MPH) while using flexible whip antennas vs stiff antennas. It has been said that whip antennas change their radial patterns at higher speeds due to the antenna flexing rearward at speed, thus I went to test this out.
Testing the Nagoya 200C stiff antenna vs the Laird C150/450 whip antenna.
Both are dual band 5db gain NMO mounts.
What I found out:
1) There was no obvious difference in signal clarity and quality on either of the two systems utilized for the test, at 75mph broadside to the repeater 45 miles away from my location. Both tests run at 5 watts, on the same coax cable, same connection point on hood, same mic, same radio.
2) There was a definite loss of sound quality associated with using the OEM Motorola XTVA mount, I assume this is due to running signal into the large processor within the unit before being sent out to the antenna.
3) The best quality came from the handheld unit, with the handheld wideband UHF antenna. WOW! That goes to show alot.
4) This test did not test the capabilities of "punching power" of the available systems as the repeater was only 45 miles way, with no large or obvious mountain ranges blocking transmission path.
5) The SWR on these tests performed at highway speeds also showed no change in signal quality while the whip antenna was flexing away.
Note: This is an all OEM parts Motorola XTS5000 with upgraded code plug and flash. No aftermarket chinese parts installed on this radio. It was also tuned and aligned within the last 3 months, passing all specs.
This was my test, and can be used to your benefit. Do not take this as the holy grail of information. I am one man, one radio, one test.
Enjoy!
Disclaimer: All demonstrations and theory are based solely on my experience and learned discipline as an automotive technician, and are to be used as educational purposes only. If you are unsure of, or in doubt of your abilities to perform such a task on your vehicle, seek a higher level of care threw an established auto repair or maintenance shop. Anthony Sardegna and all affiliates of DIYautotech Automotive Diagnosis and Repair are not liable for any damages caused by work performed by you or any else on your vehicle.
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