ME-TUN A Professional FM Tuner USER‘S MANUAL ME-TUN Manual E; january 2005 e-mail: mail@mediaengineering.com web: www.mediaengineering.com www.me-tun.com www.fm-spy.com MEDIA ENGINEERING Markus Stocker ∗ Professional Broadcasting Systems ∗ Rainstr. 15 CH-8104 WEININGEN (ZH) ∗ Switzerland ∗ Phone: +41 1 750 66 88 ∗ Fax: +41 1 750 66 91 mail@mediaengineering.com ∗ www.mediaengineering.com ∗ www.me-tun.com ∗ www.fmspy.
ME-TUN USER`S MANUAL MEDIA ENGINEERING wants to thank you for selecting this MEDIA ENGINEERING product. For optimum performance and installation we recommend to read the following instructions carefully. In case of difficulties please contact one of our distributors or the manufacturing company. Manufacturers address: MEDIA ENGINEERING Markus Stocker Rainstrasse 15 CH - 8104 WEININGEN (ZH) Switzerland Phone Fax E-mail Web : : : : +41-1-750-66-88 +41-1-750-66-91 mail@mediaengineering.com www.
ME-TUN USER`S MANUAL MEDIA ENGINEERING Markus Stocker Rainstrasse 15 CH - 8104 WEININGEN (ZH) Switzerland Phone : Fax : E-mail : +41 1 750 66 88 +41 1 750 66 91 mail@mediaengineering.
ME-TUN USER`S MANUAL CONTENT A. INSTALLATION INSTRUCTIONS .................................................................................... 5 A.1. SAFETY CONDITIONS ................................................................................................. 5 A.1.1. ELECTROMAGNETICAL INTERFERENCE............................................................ 6 A.1.2. ENVIRONMENT TEMPERATURE .......................................................................... 6 A.1.3.
ME-TUN USER`S MANUAL A. INSTALLATION INSTRUCTIONS A.1. SAFETY CONDITIONS After removing any housing parts and electronic assemblies it’s possible to get access to live parts. It‘s essential to ensure that the subsequent safety rules are strictly observed: Servicing of electronic equipment must be performed by qualified personnel only. Before removing covers the equipment has to be switched off and the mains cable unplugged.
ME-TUN USER`S MANUAL A.1.1. ELECTROMAGNETICAL INTERFERENCE In case the ME-TUN is installed and operated in a strongly electromagnetical disturbed environment, signals of interferences can occur during reception of the FM Band. A.1.2. ENVIRONMENT TEMPERATURE Preferably install the equipment in a dry location with approximately 20 centigrades (room temperature) of ambient temperature. The ambient temperature has a large influence on the contrast of the LCD display. A.1.3.
ME-TUN USER`S MANUAL A.2. INSTALLATION PROCEDURE Place the ME-TUN professional FM tuner in a horizontal position, and do not place anything heavy on it. Never bring a magnet or magnetized objects near the tuner, because such will adversely affect the performance of the ME-TUN. Should it be necessary to change the sampling rate of the digital audio output to another value than the factory set 48kHz please refer to chapter A3.
ME-TUN USER`S MANUAL A.3. SETTING THE SAMPLING RATE FOR THE DIGITAL AUDIO OUTPUT The AES/EBU digital audio output on the rear side of the ME-TUN is featuring a sampling rate of 48kHz. This sampling rate is factory set and marked on the rear panel as such. In case this is not the propre sampling rate for a given application it’s possible to choose one of three other values: • 32 kHz • 44.
ME-TUN USER`S MANUAL 10. locate the two jumpers J1 and J0 according to the PCB layout drawing: jumper J1 jumper J0 11. choose the new sampling rate and select the propre jumper setting: J1 fs 96 kHz 48kHz 44.
ME-TUN USER`S MANUAL 12. put the output amplifier board back into the ME-TUN. Make shure the 22pin connector fits right into the socket underneath the cutout in the metallic shielding. The board is placed perfectly if there shows up an air gap between the board and the side wall of the ME-TUN of approximately 0.5mm 13. put in place the three black M3 screws in order to hold down the output amplifier board. Make shure the propre screws with the half spherical head are used 14.
ME-TUN USER`S MANUAL A.4. CABLING Connect an antenna cable to the “RF Input A” or “RF Input B” socket of the ME-TUN. These inputs are featuring F-type connectors (female chassis receptacles) with 75Ω impedance. switch OFF-POWER-ON RF Input A RF Input B AC mains input ME-TUN (back view) A matching coaxial antenna cable is needed. Contact your ME-TUN dealer for advice on a suitable cable to use.
ME-TUN USER`S MANUAL B. OPERATING INSTRUCTIONS B.1. BASIC OPERATIONS B.1.1. STARTUP SEQUENCE After proper installation of the ME-TUN (refer to A.2. INSTALLATION PROCEDURE on page 7), flip the “OFF-POWER-ON” switch on the rear side to the “ON” rsp. upper position in order to start up the device. Upon power on, ME-TUN enters the initialization sequence and displays the firmware version information on its LCD display (screen 1). ME-TUN R1.
ME-TUN USER`S MANUAL B.1.3. THE INITIAL STATE ME-TUN is memoryzing its settings during power-off and will - upon power up - display and tune to the frequency that was received just before power was lost or switched off. This frequency will be displayed in the top left position of the display after the startup sequence as shown in “screen 2”. 102.
ME-TUN USER`S MANUAL B.1.4. TUNING IN TO A SPECIFIC FREQUENCY When the tuner is powered up and waits in the INITIAL state (refer to section B.1.3: INITIAL STATE on page 13), the desired frequency, e.g. 103.250 MHz, may be inputted directly. There is no need to step through menu functions in order to get to a tuning menu. Under the condition, that the antenna input in use is already set properly (otherwise refer to B.2.6.
ME-TUN USER`S MANUAL B.1.5. SAVING A PRESET Out of the INITIAL state of ME-TUN (refer to section B.1.3: INITIAL STATE on page 13), press the SAVE/MENU button once (the arrow in keypad 3 points to the SAVE key), 1 2 4 5 ↑PGM ↑25kc 3 LOAD DISP 6 0 LOCK SCAN 7 8 9 SAVE ↓PGM ↓25kc ANTA/B MENU SAVE key keypad 3: INITIAL STATE whereupon “screen 4” will appear on the LCD display and the ME-TUN will ask for a preset number, in order to know where to save the preset.
ME-TUN USER`S MANUAL B.1.6. LOADING A PRESET Loading (restoring) a preset is similar to saving one. On the keypad the LOAD button (the arrow in keypad 4 points to the LOAD key) plus a 2-digit preset number to load (between 00 and 39) has to be keyed in. LOAD key 1 2 3 LOAD DISP 4 5 6 0 ↑25kc LOCK SCAN 7 8 9 SAVE ↓PGM ↓25kc ANTA/B MENU ↑PGM keypad 4: INITIAL STATE 103.
ME-TUN USER`S MANUAL B.1.7. SETTING THE INFO MODE The bottom row of the LCD display is featuring one out of three possible info modes: 1. RFL (Radio Frequency Level) in a bargraph presentation indicating the strength of the antenna signal (at the RF antenna input in use). 102.025 MHz mono ҰA RFL |■■■■| 2. RFL (Radio Frequency Level) in a numerical representation in "dBµV" (the reference level is 1µV what equals 0dBµV, e.g. 46dBµV = 200µV) 102.025 MHz mono ҰA RFL 46dBµV 3.
ME-TUN USER`S MANUAL B.1.8. HEADPHONES VOLUME CONTROL On the front side of the ME-TUN there is totally to the right side the headphones connector. This is a standard ¼” Jack as very widely used for headphones worldwide. headphones volume UP volume DOWN There are two push-buttons to the left of the headphones connector. These are serving for the headphones volume control in a highly sophisticated microprocessor controlled manner: • after powering up the ME-TUN both push-buttons are illuminated.
ME-TUN USER`S MANUAL B.2. EXTENDED OPERATIONS B.2.1. MENU FUNCTIONS Some special features are accessible through MENU functions. The MENU is activated by a double-press on the SAVE/MENU button out of the INITIAL state (refer to section B.1.3: INITIAL STATE on page 13).
ME-TUN USER`S MANUAL During using MENU functions the automatic “fall back to INITIAL state” feature of the METUN is still active. After a certain time without any user input, ME-TUN will quit the MENU state and fall back to the INITIAL state (refer to section B.1.3: INITIAL STATE on page 13). When pressing the SAVE key from the MENU state, ME-TUN will be switched back to INITIAL state, too. B.2.2. STEPPING THROUGH PRESETS One can load a preset (as described in section B.1.6.
ME-TUN USER`S MANUAL B.2.3. FINE TUNING By entering the MENU state and using the push-buttons ↑25kc or ↓25kc on the keypad, one can alter the FM receivers tuning frequency in 25kHz steps up or down. 25kHz step up 1 2 3 LOAD DISP 4 5 6 0 ↑25kc LOCK SCAN 7 8 9 SAVE ↓PGM ↓25kc ANTA/B MENU ↑PGM 25kHz step down keypad 10: MENU When pressing one of these buttons continuously, the stepping will be faster. The frequency range of the receiver (87.5MHz to 108.
ME-TUN USER`S MANUAL B.2.4. LOCKING THE TUNER In order to prevent the ME-TUN from unwanted manipulations, it's possible to activate the "LOCK" feature. This is done in the MENU state (refer to section B.2.1. MENU FUNCTIONS on page 19) and using the LOCK button (see “keypad 11”). 1 2 3 LOAD DISP 4 5 6 0 ↑25kc LOCK SCAN 7 8 9 SAVE ↓PGM ↓25kc ANTA/B MENU ↑PGM keypad 11 The entire sequence to lock the ME-TUN is: MENU-MENU-LOCK.
ME-TUN USER`S MANUAL B.2.5. SCANNING THE FM CHANNELS The automatic FM channel scanning function of the ME-TUN is a useful feature when the device has been installed in a new location with entirely different radio sound broadcasting stations as at the previous location. When enabling the automatic scanning function, METUN scans the FM frequency band from 108.000MHz downwards to 87.500MHz and stores all channels with strong enough RF levels (the threshold is set to 50dBµV) to its internal memory.
ME-TUN USER`S MANUAL By pressing the LOAD button ME-TUN will effectively start the scanning function. During scanning, there will show up a backlight sequence of the LED illuminated push-buttons (simulating a tuning wheel rotating counter clock wise) and the tuning frequency will be decreased in 100kHz steps starting from 108.000MHz. Also shown is the actual preset number that ME-TUN will use to store a channel. 107.
ME-TUN USER`S MANUAL B.2.6. SELECTING THE ANTENNA INPUT To change the antenna input in use, enter the MENU state (refer to B.2.1.: MENU FUNCTIONS on page 19) and press button ANTA/B on the keypad. 1 2 3 LOAD DISP 4 5 6 0 ↑25kc LOCK SCAN 7 8 9 SAVE ↓PGM ↓25kc ANTA/B MENU ↑PGM keypad 8: MENU ANT A/B After pressing this key, ME-TUN will toggle the antenna input from A→B or from B→A, depending on the previous selection of the antenna input.
ME-TUN USER`S MANUAL C. PINOUT OF 25 PIN D-TYPE CONNECTOR ON THE REAR SIDE The 25pin D-type connector AUXILIARY INTERFACE on the rear side of the ME-TUN is a female chassis type receptacle. While looking onto the connector from the rear the pinout of this connector is as follows: PIN # Signal / Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Gnd (Chassis) MPX-OUT (+5.5....+6.5dBu @ nom dev.@600Ω) SCADATA RDSCLOCK (1187.
ME-TUN USER`S MANUAL D. EXAMPLE OF HOW TO USE THE AUXILIARY INTERFACE The schematic diagram represents the internal ciruitry of the ME-TUN in regard of the AUXILIARY INTERFACE. Also two application examples are shown: the implementation of relais coupled switching outputs with the use of an internal rsp. external DC source. File: ME-TUN Manual E.
ME-TUN USER`S MANUAL E. SUMMARY OF KEYBOARD COMMANDS 1st keystroke 2nd keystroke 3rd keystroke 4th keystroke 5th keystroke 3 2 5 ↑PGM …………… ↓PGM …………… ↑25kc …………… ↓25kc …………… LOAD …………… 6th keystroke TUNING to 103.250 MHz: 1 0 SAVING PRESET NO. 27: SAVE 2 7 LOADING PRESET NO.
ME-TUN USER`S MANUAL F. TECHNICAL SPECIFICATIONS ANTENNAE INPUTS number of antennae inputs ............................................................................................... 2 antenna input impedance .…........................................................................................ 75 Ω antenna input connector type......................................................................... F (receptacle) antenna input circuit............................................................
