The Roadie Tuner was launched in 2014 and is the first-generation product in the family of Roadie automatic guitar tuners. Roadie Tuner robotically rotates the pegs of stringed instruments to bring them to the desired pitch. To work, the tuner requires to be connected with its free Roadie Tuner mobile application available for both Android and iOS users. Roadie’s rotating head fits over the tuning pegs, and as the user plucks each string, the app will listen and send a bluetooth command to the device to adjust the tuning to the correct setting. Through the mobile application, users can set their tuning of choice, including alternate tunings and create their own custom tunings.
The Series Parallel Capacitor or SPC tuner uses a band-pass circuit that can serve both as an antenna coupler and as a preselector. The following is a simplified description of the SPC circuit: In the diagram, the upper capacitor on the right matches impedance to the antenna, and the single capacitor on the left matches impedance to the transmitter. The coil and the lower-right capacitor form a tank circuit that drains to ground out-of-tune signals. The coil is usually also adjustable (not shown), in order to widen or narrow the band-pass and to ensure that the ganged right-hand capacitors will be able to both match to the antenna and tune to the transceiver's operating frequency without compromising one or the other.
An electronic tuner is a device which tunes across a part of the radio frequency spectrum by the application of a voltage or appropriate digital code words. This type of tuner supersedes mechanical tuners, which were tuned by manual adjustment of capacitance or inductance in the tuned circuits. In a more practical and everyday sense, a radio or television set which is tuned by manually turning a knob or dial contains a manual tuner into which the shaft of that knob or dial extends.
Early model televisions and radios were tuned by a rack of buttons; some of the earlier types were purely mechanical and adjusted the capacitance or inductance of the tuned circuit to a preset number of positions corresponding to the frequencies of popular local stations. Later electronic types used the varactor diode as a voltage controlled capacitance in the tuned circuit, to receive a number of preset voltages from the rack of buttons tuning the device instantly to local stations. The mechanical button rack was popular in car radios of the 1960s and 1970s. The electronic button rack controlling the new electronic varactor tuner was popular in television sets of the 1970s and 1980s.
The Hairpin tuner (top right) has the same circuit, but uses a “hairpin” inductor (a tapped transmission line, short-circuited at the far end). Moving the taps along the hairpin allows continuous adjustment of the impedance transformation, which is difficult with a solenoid coil. It is useful for very short wavelengths from about 10 meters to 70 cm (frequencies about 30 MHz to 430 MHz) where the solenoid inductor would have too few turns to allow fine adjustment. These tuners typically operate over at most a 2:1 frequency range.
Another approach to feeding balanced lines is to use an unbalanced tuner with a balun on either the input (transmitter) or output (antenna) side of the tuner. Most often using the popular high pass T circuit described above, with either a 1:1 current balun on the input side of the unbalanced tuner or a balun (typically 4:1) on the output side. It can be managed, but doing so both efficiently and safely is not easy.
An ATSC tuner works by generating audio and video signals that are picked up from over-the-air broadcast television. ATSC tuners provide the following functions: selective tuning; demodulation; transport stream demultiplexing; decompression; error correction; analog-to-digital conversion; AV synchronization; and media reformatting to fit the specific type of TV screen optimally.
If both the tuner and the feedline were lossless, tuning at the transmitter end would indeed produce a perfect match at every point in the transmitter-feedline-antenna system. However, in practical systems lossy feedlines limit the ability of the antenna tuner to change the antenna's resonant frequency. If the loss of power is low in the line carrying the transmitter's signal to the antenna, a tuner at the transmitter end can produce a worthwhile degree of matching and tuning for the antenna and feedline network as a whole. But with lossy, low-impedance feedlines like the commonly used 50 Ohm coaxial cable, maximum power transfer only occurs if matching is done at the antenna in conjunction with a matched transmitter and feedline, producing a match at both ends of the line.
All of the unbalanced tuner circuits described in the preceding main section can be converted to an equivalent balanced circuit, as follows:
Despite its name, an antenna "tuner" does not actually tune the antenna. It matches the complex impedance of the transmitter to that of the input end of the feedline. The input impedance of the transmission line will be different than the characteristic impedance of the feedline if the impedance of the antenna on the other end of the line does not match the line's characteristic impedance. The consequence of the mismatch is standing waves on the feedline that alter the line's impedance at every point along the line.
Tuner may refer to someone or something which adjusts or configures a mechanical, electronic, or musical device.
The nanoradio can also function as a tuner by extending or reducing the length of the nanotube; doing so changes the resonance frequency at which it vibrates, enabling the radio to tune into specific frequencies. The length of the nanotube can be extended by pulling the tip with a positive electrode and can be shortened by removing atoms off the tip. Consequently, changing the length is permanent and can't be reversed; however, the method of varying the electric field can also affect the frequency that the nanoradio responds without being permanent.
* Tuner (car), a customized car or hot-rod
As of the end of 2008, there were 22 Canadian DTV transmitters on-air and all existing digital transitional television licenses explicitly proscribe, as a condition of license, the broadcast of more than fourteen hours a week of programming not already on the analogue service. Unlike in the United States, there is no plan to subsidise ATSC converter purchases and no requirement that newly imported receivers decode the digital signal. Canadian retailers are also not required to disclose the inability of new equipment to receive DTV. The Canadian market therefore has been flooded with obsolete new NTSC equipment which lawfully cannot be exported to the US. A limited number of ATSC receivers are in Canadian retail stores as high-definition television (HDTV) receivers. ATSC CECB converter boxes were first carried nationally in October 2008, with chains such as Best Buy and Home Hardware offering limited selection at higher prices than in the US with no government subsidies. ATSC tuners may also be present in most recently manufactured televisions, as well as DVD recorders, HDTV FTA receivers, and personal computer TV tuner cards.
Another type of television tuner is a digital television adapter (DTA) with an analog passthrough.
An ATSC (Advanced Television Systems Committee) tuner, often called an ATSC receiver or HDTV tuner, is a type of television tuner that allows reception of digital television (DTV) television channels that use ATSC standards, as transmitted by television stations in North America, parts of Central America, and South Korea. Such tuners are usually integrated into a television set, VCR, digital video recorder (DVR), or set-top box which provides audio/video output connectors of various types.
GPS navigation applications use vector-based maps called vector graphics. This map type contains objects such as points of interest, city names, and street names, which are stored in data tables inside the map itself. GPS Tuner uses such vector map data, combined with raster graphics based maps.
Mechanical disc strobe tuners are expensive, bulky, delicate, and require periodic maintenance (keeping the motor that spins the disc at the correct speed, replacing the strobing LED backlight, etc.). For many, a mechanical strobe tuner is simply not practical for one or all of the above reasons. To address these issues, in 2001 Peterson Tuners added a line of non-mechanical electronic strobe tuners that have LCD dot-matrix displays mimicking a mechanical strobe disc display, giving a stroboscopic effect. In 2004 Peterson made a model of LCD strobe in a sturdy floor based "stomp box" for live on-stage use. Virtual strobe tuners are as accurate as standard mechanical disc strobe tuners. However, there are limitations to the virtual system compared to the disc strobes. Virtual strobes display fewer bands to read note information, and do not pick up harmonic partials like a disc strobe. Rather, each band on a virtual strobe represents octaves of the fundamental. A disc strobe provides "one band correspondence"—each band displays a particular frequency of the note being played. On the virtual strobe system, each band combines a few close frequencies for easier reading on the LCD. This is still extremely accurate for intoning and tuning most instruments—but, as of this writing, no virtual strobe tuner provides detailed information on partials.
Peterson released a PC-based virtual strobe tuner in 2008 called "StroboSoft". This computer software package has all the features of a virtual strobe, such as user-programmable temperaments and tunings. To use this tuner, a musician must have a computer next to the instrument to be tuned. An alternative is the PC-based strobe tuner TB Strobe Tuner with fewer functions.
The Z-Match is an ATU widely used for low-power amateur radio which is commonly used both as an unbalanced and as a balanced tuner. The Z match has three tuning capacitors, two of which are ganged with separate connections to the primary transformer coil, producing two distinct resonant frequencies that enable it to cover a wide frequency range without switching the inductor. Because it uses a transformer on the output side, it can be used with either balanced or unbalanced transmission lines, without any modification to the tuner circuit. All of the capacitors must be isolated from ground.