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Unfortunately, the Sharp Aquos LC-37G4U TV is an HDTV-ready monitor. It does not have an ATSC (digital OTA) tuner. The A/V Center box (TU-GA1U-S) that came with the TV has two NTSC tuners. You'll need the over-the-air ATSC to NTSC (analog) converter box or a stand-alone ATSC tuner DVR set-top box to get most OTA channels. There are only low power NTSC tuners that continue to broadcast; you will only receive those stations if you are close to their transmitters.
I'd need the model number to tell if the RCA TV has a digital (ATSC) or analog (NTSC) tuner. The mandate for inclusion of the ATSC tuner depended on the size of the TV and the year of manufacture. Small (<25" diagonal) TVs didn't need to have an ATSC tuner when they were built until 2007. The older TVs could still be sold with a "cable-ready" or similar NTSC only label. (The 32"+ TVs had to have the ATSC tuners in 2005 and the mid-size TVs had to have the digital tuners in 2006.)
For example the 27F530T was manufactured in 2003 and only has a NTSC tuner. However, the 20F424T was manufactured in 2008 and does have an ATSC tuner.
Consult your TV's owner manual and enter "set up mode" to switch the RF or Antenna input from: CATV / Cable to: Antenna / Off Air. Then, allow the TV to scan VHF & UHF for signals strong enough to "tune in". You may need to upgrade your antenna in order to collect enough signal to display video properly. Make sure that your TV has a digital tuner (ATSC) as the old analog tuners (NTSC) have no signal to tune since broadcasters were forced to digital transmitters by the FCC years ago.
Use the site linked below to help you select an antenna that will allow you to receive all signals possible at your location - without buying more antenna than you need.
Image Aspect Ratio:
V-Chip, parental control
42" - widescreen
1920 x 1080
Image Contrast Ratio:
Stereo Reception System:
Secondary Audio Program (SAP):
Analog TV Tuner:
Analog Video Input Signals:
Input Video Formats:
Sound Output Mode:
Virtual Dolby Digital
2 x right/left channel speaker - built-in
1 x composite video input ( RCA phono ) ¦ 1 x S-Video input ( 4 pin mini-DIN ) ¦ 3 x audio line-in ( RCA phono x 2 ) ¦ 2 x component video input ( RCA phono x 3 ) ¦ 3 x HDMI input ( 19 pin HDMI Type A ) ¦ 1 x digital audio output (coaxial) ( RCA phono ) ¦ 1 x audio line-out ( RCA phono x 2 )
Power supply - internal
Power Consumption Operational:
42" LCD TV
1x analog, 1x digital
Digital Television Certification:
Digital TV Tuner
Digital TV Tuner:
Shipping Weight (in pounds):
Product in Inches (L x W x H):
41.3 x 10.2 x 29.7
Assembled in Country of Origin:
USA and/or Imported
Origin of Components:
USA and/or Imported
If your trying to get digital stations over the air with a standard ntsc tuner it will never happen. The set must be equipped with a ATSC tuner, that's the one that will receive digital signal over the air. (not cable) If you have the tuner in that model then the signal must be very good or it will display "no signal". Give me a model # quick and I will do the homework for you now.
You will have to run the Autoprogram menu function from the menu. Here are the steps
Press the MENU button on the remote control.
Use the cursor down to select Installation in the Settings menu.
Use the cursor right to enter the Installation menu.
Select Autoprogram in the Installation menu.
Use the cursor right to enter the Autoprogram menu.
Press the OK button.
Select Cable or Antenna in the Installation mode.
When Antenna is selected, the TV will detect antenna signals and will search for antenna TV (NTSC and ATSC) channels available in your local area.
When Cable is selected, the TV will detect cable company supplied signals and will search for cable TV (NTSC,ATSC, QAM modulated) channels available in your area.
Make sure that registration with your cable TV provider and connection of equipment are completed.
Press the green button “Next” on the remote control.
Press the green button “Start” to start autoprogramming.
The menu screen disappears and the progress of autoprogramming is displayed.The progress bar indicates the number of analog and digital TV channels found. (Also digital channels via CableCARD are being programmed.
When Autoprogramming is complete, a message appears confirming the completion and the TV switches to the first installed TV channel.
NTSC is the earlier and soon-to-be extinct US standard, ATSC is the coming one for HD and is digital instead of analog in its signal coding.
Most later sets will determine what is available and switch accordingly.
Many stations are running tests at random now for a few minutes to let you know if your set is HDTV 'ready.'
Check with your local station schedules to see if they are listing times for this test signal.
Hey jp62388, According to information provided by the manufacturer, this model TV should have a built-in NTSC/ATSC and QAM tuner. These should allow you to receive locally broadcast digital TV signals without the use of a set-top box or digital converter box. If you're concerned about your TV's specifications, the most important thing you'll need to look for is a built-in or integrated ATSC tuner. NTSC is the old analog standard that is to be phased out in early 2009, while ATSC is the new digital standard that is to be used within the United States and Canada as NTSC’s replacement. Should you have any other questions or concerns, I'd strongly suggest checking out the FAQ section of the federal government’s official DTV transition website: http://www.dtv.gov/index.html Hope this helps you out. Sincerely, Aaron Go Ahead. Use Us.