Manuale d’uso / di manutenzione del prodotto LD100/LD100U del fabbricante Meridian Audio
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The Far oudja LD100/LD100U Line Doubler Installation & Operation Instructions.
History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Licensees and Awards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 System Description . . . . . . . .
HISTOR Y Faroudja Laboratories, located in northern Califor- nia’ s Silicon V alley , was founded in 1971 by Y ves and Isabell Faroudja to develop state-of-the-art of video processing technology .
LICENSEES AND AW ARDS 1987: SMPTE DA VID SARNOFF GOLD MEDAL AW ARD for “Contributing in Optimizing NTSC Performances” 1988: MONITOR AW ARD for “Excellence in Engineering NTSC Encoders and Decode.
The Faroudja System LD100 digital scan converter is a precision video instrument used to convert NTSC Composite, Y/C, or 525 line RGB or Component interlaced signals into 525 line progr es- sive outputs.
Circuit Description Figure 1 is a block diagram of the LD100 showing signal flow and the location of front panel contr ols and switches. Composite Video and Y/C (S-VHS) inputs are connected to the units decoder with AGC control and converted to Y , R-Y and B-Y signals.
LD100 TECHNICAL HIGHLIGHTS – The LD100 is far more than simply a “line doubler”. It is a truly unique pr oduct in the world of high performance video.
7 on two differ ent mechanisms. Horizontal resolution is a function of bandwidth (frequency r esponse) of the circuitry while vertical resolution is a function of the scanning fr e- quency (the number of scan lines in each picture).
Unpacking Remove the LD100/LD100U from the shipping container and examine it for any signs of shipping damage or missing items, (check inventory list on page 5). All shipping materials should be saved if the unit is to be moved or should need to be returned for service or repair .
15. Sync T ermination Switch – Select ON when 15. not looping the Composite Sync signal to other video devices, (75 Ohm). 16. Sync Input Loop (BNC) – Composite Sync Input Loop 17. Sync Input (BNC) – Composite Sync Input 18. Red Output (BNC) – Red Output 714mV 19.
The LD100 Control panel Selecting a push button control lights the adjacent LED to indicate activation or selection of that partic- ular function. 1) Power ON/OFF – Press the button and the LED lights green to indicate POWER ON. When the LD100 powers up it is automatically set to oper- ate just as it was when it was last turned off.
6) Brightness Level – Known as “Set-up” in the broadcast industry , the BRIGHTNESS control is used to set up the background black level. Pull the knob out and turn fully counter clockwise until the picture goes dark. Then r otate the con- trol clockwise until the black ar eas in the picture just begin to go gray .
Problem Solution No power light Unit not turned on Unit not plugged in Fuse blown No power at plug No picture Video source not selected No video source connected or operating Projector/Monitor not tur.
Overview Remote control of the LD100 / LD100U Line Doubler is provided by an RS-232 serial interface connector located on the rear panel of the unit. A external controller such as a computer or integrated system controller with an RS-232 interface may be used to control all user accessible functions of the Line Doubler .
Command Line The LD100 is programmed by means of a “Command Line”, which is an ASCII string of up to 255 characters that contains one or more individual instructions to the LD100. The Command Line offers the best compr omise between manual opera- tion via a data terminal and automatic control via a controller .
ST or st This command will return a string showing the current settings of the LD100. Example: HELP or help This command will return a list of commands used for the LD100 Line Doubler . LD100 Local / Remote Operation The LD100 stores all of it’ s settings in a Non-volatile ram and will return to the last known settings when the unit is power up.
Cable Lengths and Distribution Amplifiers To aid in achieving the bet r esults from your installa- tion, we suggest the following minimum standards for cable runs when an LD100 is used. To pr eserve the video quality of the LD100, the signal path should be no more than –3db down at 25 MHz through a 75 ohm cable.
17 SPECIFICA TIONS LD100 Specifications INPUT SIGNALS (NTSC) 525 Line 2:1 Interlace Video 1Vp-p, Negative Sync 714mV Luminance Y/C Y/C (3.58) Non-Composite 700m/Vp-p Y 286mVp-p C (Burst) RGB 700mVp-p .
W ARRANTY INFORMA TION All F AROUDJA Laboratories products ar e warranted to the original purchase against defective materials and workmanship under normal use and service for a period of one (1) year from the date of shipment.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Meridian Audio LD100/LD100U è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Meridian Audio LD100/LD100U - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Meridian Audio LD100/LD100U imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Meridian Audio LD100/LD100U ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Meridian Audio LD100/LD100U, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Meridian Audio LD100/LD100U.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Meridian Audio LD100/LD100U. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Meridian Audio LD100/LD100U insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
