Superseding the ACC101 the Clockit Controller ACC501 retains all it's functions and serves as a general purpose TC master unit wich can read, generate and compare and tune to all kind of TC rates.
Additionally it offers a variety of new features such as wordclock output, dual TC display, enhanced GPS modes and multiple I/O ports including USB ports for PC/Mac connectivity and TC-conversion modes.
Although roughly half of the size of itís predecessor the user interface has been vastly improved using a graphical display and an enhanced keypad with dual navigational cursor pads for easy two-handed operation. Power can be provided over internal batteries, USB or an external source. One load of 4 good quality alkaline AA cells should achieve over 24 hrs of continuous use (depending on activity and brightness of display backlight), and many days in a typical scenario of intermittent use. For increased battery lifetime a special standby mode has been implemented. While the main MCU controls the main time code generator, keypad, display and memory functions, a special low-power MCU monitors the power converters and an auxiliary generator is maintaining frameaccurate time code when put in standby for the full battery life of the Controller (one week or more).
To allow for even more flexible implementation of future enhancements the hardware has been purposely designed to cater for new features without major hardware updates. Updating the software is done via a Windows PC over USB running a dedicated programming tool also available from the aforementioned source.
The ACC501 features the following ports:
Lemo 5 pin, common industry TC standard
2 TC in, nominal level 100 mV min., DC decoupled
3 Aaton ASCII protocol in/out
4 Tune signal @ 1.92 MHz
5 TC out, TTL level
For setting compatible Clockit devices* and data transfer using Aaton ASCII protocol without the need of linking the units via 5 pin Lemo, typical range 4 ft 2
BNC, Sync in
This input will accept sync signals such as composite video PAL, NTSC or trilevel sync and analyse/ identify them providing vertical sync and field number signals in future software revisions. The signal can be used to externally synchronise the Controllerís time code generator or to tune the reference oscillator. Then, Lockit boxes can be recalibrated to match the speed of an OB van or house sync providing frame accurate sync of hardwired and portable equipment. Thus the total time code drift and diversion of a working system is minimised for most ease in edit.
BNC, Wordclock Out
The wordclock output is in sync to the internal time code reference generator which
makes it most useful when synchronizing equipment like stand alone audio recorders or software based solutions like the Metacorder from Gallery Software. 44.1 and 48 KHz with pull up and pull down are available natively. Higher wordclocks up to 192 KHz pull-up can be achieved via selectable multipliers of x1, x2 and x4.
Used for programming new software and as serial interface for SMPTE/P2 conversion. EXT power in 5 Volts.
Serves as MIDI TC I/O interface for SMPTE/MTC conversion, EXT power in 5 Volts.
Pin 1 VBUS +5 VDC
2 D- Data -
3 D+ Data +
5 GND Ground
The Mini B USB ports follow the USB specification. It is recommended to have the
Controller powered on with the appropriate operation mode selected when establishing the connection to a computer.
NEVER CONNECT 2 DIFFERENT COMPUTERS SIMULTANEOUSLY!
3.5mm Minijack, TC in/out
A separate LTC input/output carrying the same TC signal as the Lemo TC socket with a reduced level of 1 Volt peak to peak.
Tip = LTC-OUT
Ring = LTC-IN
Sleeve = Ground
Sub D 15 pin socket, accessory I/O interface
This socket is for general access to the controller and contains all connections
needed to interface to an external device including power. This socket can be used to
connect the ACCSI (Ambient Serial Interface) with attached GPS module. Various
options like radio link transceivers etc. to follow.
Only connect approved accessories to avoid damage. 3
The keypad is organised with the menu and command cursors on the right and general editing cursors on the left. These keys can double as hold/log when logging on the fly.
There is a red escape key on the left which doubles as an on/off switch and a green enter key on the right. Underneath there are 0-9 number keys in black with secondary functions in red and a shift key on the left. The 4 domed Allen screws protect the keypad surface.
The display is a 128 X 64 pixel graphic display with selectable contrast. The white LED backlight can be adjusted in intensity and turned off completely for reducing the power consumption.
The display is organised with a menu bar at the top and a command bar at the bottom. Movement within these bars is done by 4 cursor keys at the right of the display, two keys for left/right scroll for the menu bar at the top and 2 keys, left/right
scroll for the command bar at the bottom. The relevant status of the controller is shown in the remaining space between these bars. A command is executed by selecting the respectivecommand and then pressing ENTER or pressing the relating numeric hot-key shown in the command bar. ESC
returns to the command line. An internal mini SD flashcard slot can be equipped by the user to stack up the internal memory for logging larger data quantities (future software).
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