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Re: My 2008 cherokee radio does not receive radio...
I believe the stock radios have a reset button. If I recall, its a very small hole that you'd insert a (plastic preferred) ball point pen or similar into and hold for a few seconds. I'd refer to the manual for the location but I'm pretty sure its marked on the face of the radio as well. Start there.
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If you know you have a good AM station in your area, and you can verify its frequency, and your radio can't receive it but CAN receive FM stations... then that radio just isn't going to get AM. It's probably not worth fixing.
First thing to think about is what frequency of radio is DVBT on ?
I think you will find that the Analogue tv was VHF where as digital tv is on UHF .
This means that the wavelength of radio signals on UFH is smaller and as a result radio waves do not bounce as readily in the Air and thus the coverage range is less efficient as compared to VHF.
Also being a smaller wave length a new antenna that can cater for the different frequency ranges of digital TV would be required
To efficiently receive a radio signal the antenna's yagi elements have to each be at a length that is at a multiple of the wavelength of the radio frequency. Either 1 or 1/2 or 1/4.
wavelength = speed of light (299792458 metres per second)/ frequency in hz
Cycle through the various menus...I think there's a choice you have to enable to get the station info to show. The station freq should, though, like 104.5 on the fm band. Make sure you've selected a broadcast station and not aux input, for example.
1. Turn switch on side of radio to "ON". 2. Press "MENU". 3. Press "UP" arrow until "CHANNEL" is displayed. 4. Press "SELECT". 5. Press "UP" arrow until you hear the broadcast of your station. 6. Press "SELECT" to save station selection. 7. Press "MENU" to close menu mode. To turn Weather/Hazard broadcast on again, press "WEATHER/SNOOZE".
Note you will hear only static on the channels not received in your area. (FYI - channels are listed 1-7 on the left, and corresponding frequency numbers are displayed on the right side of display.)
At This Point You Will Receive Weather And Hazard Alerts Issued By The NWS.
Car cradle works "wirelessly" with Car Radio (inherent design of unit). Place Unit in Cradle; connect Cradle to Auto Power Source, and SkyFi3 should power on. Press Menu to Get FM Radio station channels; select a lower station Channel Frequency i.e. 88.3 or any vacant channel number and the signal should transfer to your Radio speakers automatically. You can change Station frequencies as often as you need to do so--for example if traveling through different broadcast areas, some channels frequencies are clearer than others.
if the in dash radio had that built in function BUT the radio station has to be broad-casting the info along with the transmission. it is a signal that the station has to broadcast at the same time as the RF data and there is no switch on most receivers it is automatically done by the broadcasters Good Luck look in your owners manual for your car radio! Larry Dillon
Before you call a doctor or an exorcist, verify that you're using your shortwave receiver under normal condition. There are several factors which affects reception of whortwave programs and signals.
1. Check for the time and frequencies. Depending on your country and location, all Shortwave time zones are based on World Time in UTC or GMT ("Universal Time Coordinates" or Greenwich Mean Time") In my country (Philippines, Asia) for example, we are 8 hours advanced from World Time. You can check your time zones and regions using a world map.
2. Check for propagation and band conditions/ openings. During daytime higher frequencies such as 9 -21 Mhz are active, while nightime frequencies are the lower bands such as 3 - 9 Mhz. Daytime and nigthime divider frequency is about 10 Mhz, that means you might receive signals under most conditions during daytime and night time. Check some technical books on amateur radio operations or magazines for radio reception. It might be worthwile to study books or materials on receiving international broadcasts stations before you can receive good or adequate shortwave signals. This might become your hobby too, "DXing" or receiving distant stations from across the world. Try it, but it might be an addicting hobby once you're drawn to it!
3. Check if any shortwave station broadcast in any specific time of day at any frequency. Shortwave broadcasts are scheduled based on band openings mentioned above. If for example I'm a Shortwave broadcaster from Asia, and would like to broadcast my signal through the Americas, I would use band openings with respect with time zones. If it is night time in the Philippines, and daytime in the Canada, I would use the higher frequencies to propagate my signal. So I would specify the time for example "8:00 pm Philippine local time, 12 hours UTC, and 7 am in Canada"--- Asia: 8 hours advanced to UTC, Canada--- 5 hours behind to UTC). So shortwave broadcast schedules varies. Broadcast schedules are available on the net, just search for the Shortwave station you want to hear such as Radio, Japan, Radio Australia, BBC, DW (Deutche Welle) Radio in Germany, China Radio International... There's too many shortwave stations waiting to be discovered out there! Check some books and magazines too such as Popular Communications, Monitoring Times, Passport to World Band Radios, World Radio and TV Handbook, etc. You may want to check if any station would be broadcasting in your dialects as most of these mainstream and regular broadcasters are multilingual.
2. Check your location. If you are using your radio indoors, shortwave signals might not entering your homes or offices due concrete walls and metal railings or fence. There are many factors which blocks radio waves especially in the HF or lowetr bands. Try receiving AM (Mediumwave) first. If it cannot receive any AM station, then you would not receive any Shortwave signal at all, even if you extend fully the telescopic whip. If you cannot receive AM or Shortwave signal indoors, try using your receiver outdoors.
2. Check for local interference. Your receiver might be receiving interference from noise generating gadgets such as PC monitors, TV sets, faulty wall adapters or switching power supplies, motor operated appliances such as washing machines or vacuum cleaners, flourescent lamps, etc. Try turning off or unplugging each of these mentioned gadgets to see if they are the cause. Faulty house wiring or powerline noise might also cause some interference noise which could drown shortwave signals, verify this with your local electrical technicians.
3. Check your radio's settings. Depending on the radio that you use, there might be settings such as attenuator or RF gain, be sure that attenuator are set to zero or turned to off, and RF gain to high. Attenuator must be turned to minimum or OFF position, unless you are receiving too much signas from nearby radio stations. Setting attenuator to mid or high position will attenuate most weak signal, and only those strong local stations will pass through. Setting too much attenuation will prevent you from receiving any station at all. Same with RF Gain, always set it to highest gain setting unless you are receiving too much signals which might overloads your shortwave radio.
4. If these troubleshooting efforts above doesn't works and you still cannot receive any station, then your radio's front end parts might had burn out due to signal overloads. Burn parts might include one or several transistors or diodes. Let your local service technicians check your radio and solve the problem for you. If your radio is still under warranty, send it back to the store or dealer, and let a qualified technician do the repair.
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