Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


n4



956 posts

Ultimate Geek


#150794 3-Aug-2014 15:30
Send private message

Sorry I have tried searching for this but can't find a straight forward answer to the question.

I have been trying to get Freeview Terrestrial going (in addition to the existing DVB-S service we use). We moved into the house a year ago. After testing various pieces of the system, I think I have narrowed the problem down to the UHF antenna. If I disconnect the cable from the masthead amp, and measure the resistance using a multimeter, I get an open circuit (well 1.4 Mohm). The connections on the antenna itself look very corroded. Is that definitely a sign of a problem? By way of comparison, the VHF antenna gives a short circuit (0 ohm) reading. Just looking for confirmation before I get the UHF antenna replaced.




Huawei Mate 7, on 2degrees

Create new topic
1959 posts

Uber Geek


  #1101156 3-Aug-2014 15:39
Send private message

You can't use a multimeter to measure the resistance of an antenna. The 75 ohms is impedance and not resistance. Some are open circuit and some directly connected depending on the design. Most UHF antenna I have inspected are inductively coupled and read open circuit on a multimeter but they work perfectly. Check the circuit board in the coupling box at the antenna to see if the tracks are clean or corroded and all connections are OK. That's the only way you can tell.

n4



956 posts

Ultimate Geek


  #1101169 3-Aug-2014 16:12
Send private message

Damn, thought it might not be straight forward. Thanks for the help, looks like I'll need to get back on the roof :-(




Huawei Mate 7, on 2degrees

Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

OPPO Find X2 Lite brings flagship features to mid-range 5G smartphone
Posted 29-May-2020 12:52


Sony introduces the digital camera ZV-1 for content creators
Posted 27-May-2020 12:47


Samsung Announces 2020 QLED TV Range
Posted 20-May-2020 16:29


D-Link A/NZ launches AI-Powered body temperature measuring system
Posted 20-May-2020 16:22


NortonLifeLock Online Banking Protection now available for New Zealand banks
Posted 20-May-2020 16:14


SD Express delivers new gigabyte speeds for SD memory cards
Posted 20-May-2020 15:00


D-Link A/NZ launches Nuclias cloud managed network solution hosted in Australia
Posted 11-May-2020 17:53


Logitech introduces new video streaming solution for home studios
Posted 11-May-2020 17:48


Next generation Volvo cars to be powered by Luminar LiDAR technology
Posted 7-May-2020 13:56


D-Link A/NZ launches Wi-Fi Certified EasyMesh system
Posted 7-May-2020 13:51


Spark teams up with Microsoft to bring Xbox All Access to New Zealand
Posted 7-May-2020 13:01


Microsoft plans to establish its first datacenter region in New Zealand
Posted 6-May-2020 11:35


Genesis School-gen has joined forces with Mind Lab Kids
Posted 1-May-2020 12:53


Malwarebytes expands into privacy with fast, frictionless VPN
Posted 30-Apr-2020 16:06


Kordia to donate TV airtime on Channel 200 to community groups
Posted 30-Apr-2020 16:00



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.