XDT Dual AM/FM Tuner

Appendix A

RS-232 COMMANDS

PURPOSE:

This document describes the RS-232 commands that will operate the XANTECH XDT Dual Tuner through the 9-pin RS-232 connector on the rear panel.

General Information:

Data Rate:	19,200 baud
Parity:	None
Word length:	8 data bits, 1 stop bit
Handshake:	No RTS/CTS handshaking
Connections:	simple 3 wire (Rx, Tx, Gnd) interface

DATA ENTRY PROTOCOL:

The serial buss should follow a standard serial communications protocol using Line oriented ASCII data stream. The command line must be followed with a carriage return for the unit to respond. The unit should not echo characters received back to the host.

Command Codes:
Character	Range	Function	Example
X:	0,1	Power Off / On	X1 = Power On, X0 = Power Off
T:	1,2	Tuner #	T1 = Tuner 1, T2 = Tuner 2
B:	1,2	Band #	B1 = AM, Band 2 = FM
P:	00 - 30	Preset #	P01 = Preset 1, P30 = Preset 30, P00 (just for status) = No Preset Selected
F:	4 numbers	Frequency Setting	F0890 = 890 AM, F1045 = 104.5 FM
A:	0,1	Seek Up / Down	A0 = Seek Down, A1 = Seek Up
M:	0,1	Step Up / Down	M0 = Step Down 1 step, M1 = Step Up 1 step
S:	Signal Lock /	1 = locked, 0 = not	S00 (just for status) = no signal, no stereo, S01 = invalid
	Stereo Presence	1 = stereo, 0 = mono	S10 = signal lock (mono), S11 = signal lock (stereo)
Q:	Query status	ask for tuner status	Q1 = Status of Tuner 1, Q2 = Status of Tuner 2
	of tuner		Q3 = Status of both tuners, 1 then 2
N:	0,1	Preset Step Up / Down	N0 = Step Down 1 Preset, N1 = Step Up 1 Preset
L:	01 - 30	Set Preset	L01 = Set Station as Preset #1

Command Examples:

T1B2P01<cr> would command tuner #1 to select band 2 (FM) and tune to FM preset #1

T2B1F1070L03<cr> would command tuner #2 to set AM frequency 1070 kHz as AM preset #3

This command however, would not change the current station tuned on Tuner #2

To select a station to be tuned and THEN set that station as a preset, would require two commands:

T2B1F1070<cr> would command tuner #2 to select band 1 (AM) and tune to frequency 1070 kHz.

T2L03<cr> would command tuner 2 to set the currently tuned station (in this example AM 1070) as AM preset #3

Query Example:

Q1<cr> would solicit the following response:

Feedback as to the status of tuner #1, which would include band select, station preset, frequency tuned, signal lock and stereo presence. The response string would look like this:T1B2P00F1011S11

T1 (tuner 1) B2 (FM), P00 (no preset selected), F1011 (frequency 101.1 MHz), S11 (signal lock & stereo)

Shortcut Commands:

Note: examples below are assuming Tuner 1 is in FM stereo mode and tuned to a station

Command	Response/Action
T1N1<cr>	Tuner 1 would step up to the next higher preset number
T1L01<cr>	Tuner 1 would set the currently tuned station as FM preset #1
T1S10<cr>	Tuner 1 would switch the FM mode to mono
T1M1<cr>	Tuner 1 would step up the frequency 0.2 MHz
T1A0<cr>	Tuner 1 would go into "seek down" mode
T1B1<cr>	Tuner 1 would go to AM mode and tune to the last previously tuned AM station

AM/FM Radio Tuner specifications

The Xantech AM/FM Radio Tuner is an innovative audio device designed to meet the needs of both casual listeners and avid audiophiles. This tuner has become increasingly popular due to its blend of modern technology and user-friendly design, making it an excellent addition to any home audio system.

One of the standout features of the Xantech AM/FM Radio Tuner is its digital display, which provides clear information about the current station, audio status, and other essential settings. The bright LED screen enhances usability, allowing users to easily navigate through settings even in low-light environments. The intuitive interface is complemented by a well-designed remote control, providing flexibility in managing music from a distance.

The Xantech tuner supports both AM and FM frequencies, allowing users to enjoy a wide variety of programming, from news and talk shows to music and sports. The tuner boasts a built-in high-performance antenna that ensures optimal signal reception, reducing interference and improving sound quality. This feature is particularly beneficial in areas where radio signals may be weak.

Another highlight is the tuner’s ability to store multiple preset stations, giving users the convenience of quickly accessing their favorite channels without the hassle of manual tuning. With the capability to save a significant number of presets, it caters to diverse listening preferences, making it an ideal choice for families with varied interests.

The Xantech AM/FM Radio Tuner employs advanced audio processing technology that enhances sound quality. The tuner's built-in equalizer allows users to tailor their listening experience by adjusting bass, treble, and other audio parameters to their liking. This customization ensures a rich listening experience that can adapt to different music genres or personal preferences.

In terms of connectivity, the Xantech tuner includes multiple outputs, making it compatible with various audio systems. Users can easily integrate it into existing setups, whether it's a home theater, stereo system, or multi-room audio setup. Furthermore, its compact design ensures that it can fit seamlessly into any space without taking up too much room.

Durability is also a key characteristic of the Xantech AM/FM Radio Tuner. Built with quality materials, it is designed to withstand daily use while maintaining its performance and reliability over time. This attention to quality ensures that users can enjoy their music without concern for wear and tear.

In conclusion, the Xantech AM/FM Radio Tuner combines advanced features, user-friendly design, and superior sound quality, making it a top choice for anyone looking to enhance their audio experience. Whether you're tuning in to your favorite station or exploring new ones, this tuner delivers exceptional performance and convenience, making it an essential component of any sound system.