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H501s lost manual on standard tranamitter ( no out side antennas )Transmitter shows no gps, can I download instruction ?

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Posted on Sep 08, 2018


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Google (brand)(H501s)(manual) without parens.

Posted on Sep 07, 2018


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Posted on Jan 02, 2017


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SOURCE: Need Instruction/User manual

Posted on Dec 03, 2007

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1 Answer

How do you calibrate the SWR meter in a 706 mkiig? The service manual shows how but does not expand on what dummy loads to use.

A standing wave ratio meter is rarely required to be accurate and isn't usually used with a dummy load.

Mostly if the correct antenna is used the SWR meter is placed in series with it so the antenna can be adjusted or tuned to produce the lowest reading, which is the smallest amount of energy being reflected back into the transmitter or in other words the combination of transmitter and antenna are working as efficiently as it can be.

Clearly the readings are merely relative but a degree of accuracy is needed when an inefficient or mismatched antenna is used and the SWR cannot be lowered to a safe limit. When the SWR is too high the transmitter can be damaged and so it is a good idea to know roughly the reading where the transmitter stops being safe.

A dummy load would typically be used for testing and setting up a transmitter without radiating a signal. Nonsense and spurious signals are considered antisocial and even ******* so tweaking the power, adjusting the modulation and checking for stray harmonics would be carried out using a dummy load.

Apr 01, 2017 | Radio Communications

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My tv says no signal on one channel, how do i get that channel back ?

If you are getting an OTA signal, you should check your antenna, any amplifier or splitter and the station's status. The "No signal" message indicates that the signal is not strong enough to be resolved by the tuner.

1) Is your antenna pointing in the correct direction? Outdoor antennas can sometimes turn in the wind. Reset the antenna to the correct direction.

2) If you have a splitter dividing the signal between TVs or other devices, try a direct connection to the one TV that isn't receiving the channel. Similarly, if you have an amplifier in the system, try using the antenna without it. (I have seen an amplifier become a filter for select channels when damaged.) The only solution is to replace the device or omit it. (In my case, some channels require amplification; thus we replaced the amplifier.)

3) Has the station's local transmitter/repeater been damaged? Check their news feed. Towers fall and transmitter components can fail.

You could try and see if another tuner picks up the signal. Some low end tuners are more sensitive to signal strength. If you are getting the station from another source, check with the provider. We recently lost some of the local PBS stations due to problems with the cable provider's feed. Only one TV is connected to the set top box.

I hope this helps.

Cindy Wells

Feb 13, 2015 | Televison & Video

1 Answer

Lost my instruction manual canyou help


You can download and print the instruction manual for Navman iCN 520 in PDF format by clicking this link.

Adobe PDF Reader is required to view this manual. Download Adobe Reader

Hope this helps. Kindly let me know if you have any difficulty in downloading the manual.

Thanks for using FixYa.

Mar 31, 2011 | Navman iCN 520 GPS Receiver

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It keeps saying waiiting for a valid GPS signal.

Your GPS transceiver(Transmitter/reciever) is not working.It is either obstructed by a metal plate or any part of your vehicle or the cone where the signal is detected is disconnected from the circuit board.Try relocating the unit to where there is no obstruction(any metal).If this does not work it needs servicing.The transceiver is usually located on the middle top side of the unit.It is the antenna where the GPS satellite signal is recieved.

Nov 19, 2010 | Tomtom XL 330 Car GPS Receiver

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Cannot program a replacement transmitter.

unplug your antenna and short out all the terminals on the antenna together then try again

Jun 05, 2010 | Remote Start System

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We have lost our instruction manual. need help

You can download the manual from here:

Oct 03, 2009 | Tomtom ONE GPS Receiver

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How to download opperation manual

Need a manual guide on how to use my Garmin - NUVI 255W - Serial 200W. I lost the one that came with my Garmin.
Can you help
Linda Prince

Apr 21, 2009 | GPS

1 Answer

Philips navigator MK8 Gps antenna is showing good but no update. Red light continualy flashes indicating wrong date and time. Can you help

Hi Johnsue05

pls. check the signal to noise ratio of the antenna signal. Sea page 23 and 24 of this manual:

If the signal to noise ratio is low, the GPS may have a bad antenna, cable connection or a defective antenna.

If you have performed a cold start (i.e. changed the backup batterie) you have to wait for 2-3 hours until der GPS has downloaded the almanach information.

Hope this helps.


Sep 11, 2008 | GPS

2 Answers

Garmin Nuvi 660 - how do I get FM Transmitter firmware

I believe in your location it comes as an option. transmitter is an optional module. You can browse the user manual at following link (PDF file)
You can see at 35th page, simple instructions have been given for FM transmitter settings.

If it doesn't work please contact to the Manufacturer. I couldn't find Garmin's Ireland number. However you may call UK number +44-870-8501242. Or simple you call your reseller.

Good Luck

Jan 23, 2008 | Garmin Nuvi 660 GPS Receiver

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Navigon 5100

There is a volume control - you can make it louder

Dec 29, 2007 | Panasonic Navigon 5100

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