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AEC-BOX-80/81/82/83 Literature SERIAL ADAPTERS FOR PARALLEL REMOTE
VTRs The AEC-BOX-80/81/82/83 products were designed to effectively add serial control capabilities to most JVC, Panasonic, and Sony VTRs which have rectangular parallel remote control connectors on the back. This allows these VTRs to be used with "serial only" editors, machine controllers, automation systems, etc.. In addition, the LTC and/or VITC reader/generator options for these boxes allow them to "look like" modern serially controlled VTRs with internal time code readers and generators. All of the time code data is then accessible via the serial port. Two serial protocols are included in each box. The first ("AEC protocol") is designed for easy control via personal computers. The second ("Sony protocol") is the same as that found on Sony Betacam, Sony U-matic, and Panasonic MII machines. Each AEC-BOX-80/81/82/83 is small (modem sized), rugged (all metal), and attractive. The box receives its power from the VTR (via the REMOTE connector), so no AC power cords or external AC adapters are required. Installation is very easy. We supply the cable which goes from our box to the VTR's parallel remote connector. You supply (or order) the RS232/RS422 cable which goes from our box to the controller. Then you just hook up the LTC/VITC inputs and outputs (if present) as needed. Please call us at 1-800-782-2321, or at the number above, if you have any questions. We look forward to hearing from you. Sincerely, Tracey Ruesch, President P.S. If your application requires something a little different from what you see here, please give us a call. These boxes (and their software) have been designed with customization in mind. Since we are a small company, we can (usually) respond quickly to your particular needs, and at a reasonable price. Adrienne, AEC, AEC-BOX, PC-207M, PC-LTC, PC-VITC, and PC-VLTC are trademarks of Adrienne Electronics Corporation. Sony, U-matic, and Betacam are trademarks of Sony Corporation. SERIAL PORT OVERVIEW As mentioned earlier, two serial protocols are available. A DIP switch inside the box selects the desired protocol. Both RS232 and RS422 data lines are present in the 9-pin "SERIAL CONTROL" connector on the box, so it is possible to use RS232 or RS422 with either protocol. For the RS422 case, the pinout is that of the standard ESbus Tributary normally used by 9-pin serial remote VTRs. For the RS232 case, a nonstandard cable is required to interface to 9-pin (PC/AT) and 25-pin (standard) RS232 ports. "AEC PROTOCOL" NOTES We developed the "AEC protocol" to make it easy to control VTRs via the RS232 serial ports which are present on virtually all personal computers. Serial communications are at 9600 baud, 8 data bits, odd parity, 1 stop bit. Many transport commands require only one byte to be sent. Special attention has been paid to making it "easy" to use, including full access to all time code functions. "SONY PROTOCOL" NOTES The "Sony protocol" is used by Sony Betacam, Sony U-matic, Panasonic MII, and many other broadcast quality VTRs. Specifically, we implement all documented (and many undocumented) BVU-800 commands. Serial communications are at 38400 baud, 8 data bits, odd parity, 1 stop bit. The baud rate and protocol are difficult to use with most personal computers, but do provide plug-in compatibility with almost all serial VTR controllers. VTR PERFORMANCE NOTES Our boxes cannot IMPROVE the performance of your VTR. We also cannot control features of the VTR which do not exist (i.e. cannot do records or edits on playback-only machines). We are limited to providing functions which the VTR provides access to via the remote control connector. HOWEVER, we do implement many functions, like searches and auto-edits, which the VTR can't do by itself. Standard functions include REWIND, FAST FORWARD, STOP, PAUSE, PLAY, RECORD, SHUTTLE, STILL, SEARCH/GOTO, EDIT, E-E ON/OFF, PREVIEW, AUTO-EDIT, REVIEW, etc.. Please call if you have any concerns as to what our boxes can and cannot do with your particular VTR. JVC VTR NOTES The VTR must have a 45-pin rectangular "REMOTE" connector on it. Our boxes are designed primarily to control the U-Matic CR-8250U, the S-VHS BR-S611/811U, and similar VTRs. Machines which were built to be editing decks can do sync rolls, insert and assemble edits, E-E ON/OFF, and other advanced editing features. PANASONIC VTR NOTES The VTR must have a 34-pin rectangular "REMOTE" connector on it. Our boxes are designed primarily to control the 6000 and 7500 series machines which have such connectors, but will probably work with other machines having these connectors as well. Machines which were built to be editing decks can do insert and assemble edits, E-E ON/OFF, and other advanced editing features. In addition, the AG-7500A can do proper sync rolls if you specify the "CAPOVR" capstan override option with your order. SONY VTR NOTES The VTR must have a 33-pin rectangular "REMOTE" connector on it. Our boxes are designed primarily to control the 5000, 7000, and 9000 series machines which have such connectors. Machines which were built to be editing decks can do sync rolls, insert and assemble edits, E-E ON/OFF, and other advanced editing features. VTRs WHICH WE DO NOT SUPPORT We do not support all "parallel remote" VTRs. The Ampex VPR-2B is a good example. We do however appreciate requests for new products, some of which do eventually happen... EDITOR COMPATIBILITY NOTES This section only applies if you are purchasing an AEC-BOX- 80/81/82/83 in order to perform serially controlled editing with your parallel controlled VTR. Most parallel controlled VTRs change speeds and modes much more SLOWLY than serially controlled VTRs. Some editors handle the speed differences well, and others do not. Other potential problem areas are edit offsets and the VTR's color framing and "bumping" capabilities. We are willing to provide advice, and to work with you if necessary, in putting together a successful editing system using our boxes. TIME CODE READERS - GENERAL CHARACTERISTICS No hardware changes are required to read both SMPTE and EBU format time codes. ALL of the time bits, user bits, AND embedded bits are available for inspection every LTC frame and VITC field, including the special DROP FRAME and COLOR FRAME bits. LTC READER NOTES The LTC input connector is a standard RCA phono jack, and is normally connected to the LTC output jack on the VTR. This high impedance input accepts LTC input signal levels ranging from 100mVpp to 20Vpp. A proprietary integrated circuit is used to read even poor quality LTC signals from (theoretically) 1/30x to 50x play speed, in both the forward and reverse tape directions. In cases where the LTC signal is unreadable, such as below 1/10x with many VTRs, the VTR's control track pulses are used to automatically adjust the LTC data as needed. VITC READER NOTES The video/VITC input connectors are high impedance looping BNC's, so you loop the video output from your VTR through this box. Video signals which have been severely low pass filtered or otherwise distorted will not be readable, due to the short pulses (high frequencies) used to encode the VITC data. VITC line selection is automatic (default), or can be specified via EPROM modifications, the "AEC protocol", or with a setup program (on diskette) which we supply for use with IBM PC's. The VITC reader uses a proprietary integrated circuit to read even poor quality VITC signals from at least -1x to STILL to +3x. Often it will work up to +10x. In cases where the VITC signal is unreadable, such as at search speeds, the VTR's control track pulses are used to automatically adjust the VITC data as needed. AUTO LTC/VITC READER NOTES The AEC-BOX-83 has both LTC and VITC read capabilities. In addition to the LTC and VITC reader notes above, this box automatically switches back and forth between reading LTC and VITC, depending upon which signal has the fewest read errors. TIME CODE GENERATORS - GENERAL CHARACTERISTICS ALL of the time bits, user bits, and embedded bits (like DF/NDF) are under software control, and may be changed every frame if desired. The time bits are automatically incremented every frame while recording. Our boxes do not have the ability to sense color subcarrier phase, so cannot generate time codes having proper color framing. LTC GENERATOR NOTES The LTC output connector is an RCA phono jack, and is normally connected the the LTC input jack on the VTR. The LTC generator can either freerun or use an incoming video signal as a phase and frequency reference. The generator output "coasts" through video reference dropouts of any duration. VITC GENERATOR NOTES The VITC output connectors are high impedance looping Benches, so you loop the video input to your VTR through this box. Frequency response is +0.1dB max up to 5MHz. The video field ID bit and CRC byte, along with the time bits, are updated automatically every video field. The VITC generator lines default to 14 and 16, or can be specified via EPROM modifications, via the "AEC protocol", or with a setup program (on diskette) which we supply for use with IBM PC's. Our boxes cannot read and write VITC simultaneously. Also, the generator is actually an ADDER, which means that the line onto which VITC is to be added MUST BE BLANK. If a VITC signal has already been recorded on the desired line, you will have to find some other line. Also note that VITC cannot be added to the video signal on an existing video tape - it must be ADDED during original recording or while dubbing to another tape. Because of the limitations just noted, VITC cannot be jammed over existing VITC while editing. The VITC generator is thus intended primarily for use during initial recordings. NTSC/SMPTE AND PAL/EBU COMPATIBILITY The "AEC protocol" allows software switching between NTSC/SMPTE and PAL/EBU operations. The "Sony protocol" has no provisions for doing this. It is very important that the box know what kind of VTR and signals are present in order for it to operate properly. All boxes are factory set for NTSC/SMPTE operations unless you specify the "EBU" option when you order the box... AEC-BOX-80/81/82/83 ORDERING GUIDE (US$) Model Description Price =================================================================
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Copyright © 2006
Adrienne Electronics Corporation
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