The Trilevelsync Lockit box ACL 202CT_V9_2

The Trilevelsync Lockit box ACL 202CT_V9_2
THE TRILEVELSYNC LOCKIT BOX
Timecode, Videosyncs, Trilevelsync, Wordclock
Generator
ACL202C/ACL202CT Trilevelsync option
Description and instructions for use. Update2005
AMBIENT RECORDING GmbH
Schleissheimer Str 181c,
D-80797 Munich Germany
Te+49 89 6518535 Fax+49 89 6518558
Email: info@ambient.de
internet: www.ambient.de, www.ambientaudio.com
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The Lockit synchroniser ACL 202 CT
Description
The Ambient Lockit ACL 202CT is a highly accurate portable timecode and video
sync generator. Audio and video machines such as DAT, harddisc and DVD
recorders and HD and Digibeta cameras can be synchronised to the Lockit box,
thus giving very low drift between machines, thus allowing multicamera shoots to
be carried out without cables or timecode radio links.
Typically, the drift will be less than one half frame a day, giving problem free
editing and syncing in Post Production.
The Lockit can be used in any recording situation where the accuracy of the TC
generators in the different machines is not known and where a cable connection
is not possible. Each machine is jamsynced and Genlocked, (if possible,) to its
own Lockit which is synced to a common source before the machines start. The
Lockit can be jam synced with external timecode or set with Aaton "Origen C"
ASCII code.
Special Features
•
Clockit tunable reference oscillator for timecode generation gives typically
less then one half frame a day timecode drift.
•
Hightly accurate DTCXO reference oscillator. Can be calibrated in the field
to 0.2ppm using Clockit Controller ACC101.
•
Crystal oscillator for Video and trilevelsync locked to reference oscillator
low jitter high stability signals.
•
24, 23.98, 25, 29.97, 30 Frame Timecode Locked to PAL, NTSC, 30 Frame
NTSC and Sony HD and Panavision Varicam standards and Wordclock
48kHz
•
Drop frame timecodes can be selected
•
Extensive unit monitoring through 2 Leds
•
DC/DC converter for Long life. Over 17hrs (24 hrs**) with 2 penlite cells and
75 Ohm video input connected.
**Note: With new modification Standard from July 2004. See black battery
Contact cap for mechanical polarity reversal protection.
2
1.1 Controls
DIP Switches behind battery slider ( note towards switch numbering is on)
Switch
1
2
3
4
5
6
7
24
25
30
29.97 Frames
on
off
off
on
off
off
on
on
on Dropframe (30, 29.97Fps sw 1,2) or 23.98 Fps(sw 1,2, 4)
off no Dropframe
Mode switch (see tables)
Set standard progressive off/ interlaced on / special (see tables)
Set standard normal video rate off / double video rate on/ special
(see tables)
Insert userbits in timcode / or old Colour Lockit, trickle charge nicads
•
Top red switch
mode switch B:
•
Bottom red switch mode switch A:
•
Yellow Switch
Left, Composite Video.
Right, Trilevel sync/ reserved
Left, Composite Video.
Right, Trilevelsync/Wordclock
Main On/Off
Selection Tables for Timecode rates and sync output
Detailed Description of switches
•
The Lockit box has various switches which can be accessed by sliding the
battery door in the direction of the batteries to expose the slot with the
switches. Looking at the slot with the BNC output sockets to the right you will
see. Dipswitch 1 to 7. Two red/black switches one above the other .
Yellow on/off switch
•
When the lockit is switched on the switch positions are entered into the
microcontroller to select timecode framerate and sync output. After that
changing the switches will not change the internal settings. However it is
recommended not to move the switches after the Lockit box has been
switched on.
•
Dipswitch 1 to 3 are for selecting the timecode Framerate. Dipswitch 3 has a
special function in that it selects dropframe mode when 30 or 29.97 fps
timecode is selected and if 24 fps is selected then this switch on selects 23.98
fps.
3
•
Dipswitch 4 is a mode switch.
When composite video is selected off is PAL and on is NTSC
When trilevel sync is selected Off is Panasonic VaricamHD (SMPTE 296) , only
59.94P and 60 P. On is Sony HD (ITU R BT 709. SMPTE 274), all rates.
• Dipswitch 5 and 6 are video format switches in trilvel mode
Note:Dipswitch 5,6 have no function when composite video is selected.
When Trilevel sync, switch 4 On (Sony HD) is selected they have the following
function.
Dipswitch 5 Off is progressive mode,On is Interlaced / segmented frame. eg 24
Psf or 60I.
Trilevel sync mode, switch 4 off ( Panasonic Varicam): no function
Note: Interlaced I and progressive segmented frame, (Psf) trilevelsync signals
are identical for genlock purposes.
• Dipswitch 6 selects doubleTrilevel sync video rate
For example: When 30 fps timecode is selected in trilevel mode and dipswitch
4 is on (Sony HD) and switch 6 is on, 60P SMPTE 274 will be selected. Please
note that these rates although set out in the spec are not available on the Sony
HD camera. Only segmented frame, Psf, or interlaced, I, modes are used
Dipswitch 5,6 have a special function when both on. When Sony HD is selected.
• Only Trilevesync 24, 23.98 Psf will be output sync to timecode ( every full
second) when full integer or pull down timecode framerates are selected
respectively. For example if 30, 24, 25 fps timecode is selected then 24Psf will
be output. If 23.98, 29.97 fps timecode are selected 23.98 Psf will be output.
Note:This allows one to put for example a 29.97 fps timecode on a camera
audio track while genlocking the camera which is running at 23.98 Psf.
• When dipswitch 4 is off (Panasonic Varicam) switch 5 and 6 must be off for
trilevel sync to be generated. See notes on Panasonic Varicam.
Dipswitch 7 has a special function.
• In older lockit models this was trickle charge Nicad batteries. In the Trilevel
Lockits the charge function is eleiminated
• In the latest software this switch has a jam lockout function and inserts
userbits from external TC into Running timecode. It functions as follows. The
Lockit is set as usual then the timecode is withdrawn from the TC in socket.
Switch 7 is put on then external TC reinserted. Userbits from the external code
will be inserted asynchronously into the lockit’s timcecode without rejam. See
new software notes
4
DIPSWITCH SETTINGS
48Khz Wordclock with timecode
1 2 3 4 5 6 7
off off off off off off off
X
X
1 2 3 4 5 6 7
off
off off off off off
on
X
1 2 3 4 5 6 7
off
off off off off
on on
X
1 2 3 4 5 6 7
off off off off off off
on
X
1 2 3 4 5 6 7
off
off off off off
on
on
X
1 2 3 4 5 6 7
off off off off ff
on on
X
1 2 3 4 5 6 7
off off off off
on on on
X
25 fps timecode 48Khz wordclock
X
30 fps timecode 48Khz wordclock
X
30fps dropframe timecode 48Khz wordclock
X
24 fps timecode 48Khz wordclock
X
23.98 fps timecode 48Khz wordclock,
X
29.97fps timecode
X
48Khz wordclock
29.97fps dropfr. timecode 48Khz wordclock
5
Timecode with composite video (Black and burst)
1 2 3 4 5 6 7
off off off off off off off
X
X
25 fps TC PAL composite video
1 2 3 4 5 6 7
off
off
off off off
on
on
X
X
30 fps TC with 30Fps NTSC composite sync
1 2 3 4 5 6 7
off
off off off
on on on
X
X
1 2 3 4 5 6 7
off
off off off
on on
on
X
X
1 2 3 4 5 6 7
off off off
on on on on
X
X
1 2 3 4 5 6 7
off off
off off off
on
on
X
X
24 fps timecode 30 fps NTSC comp. sync
1 2 3 4 5 6 7
off
off off off
on
on on
X
X
23.98 fps timecode 29.97 fps NTSC comp.video
30 Fps dropframe TC. 30 fps NTSC comp. sync
29.97 Fps TC. 29.97 fps NTSC comp. video
29.97 Fps Dropfr TC. 29.97 fps NTSCcomp. video
6
Timecode with Trilevel sync Sony HD ( ITU- R BT 709). switch 4 on
1 2 3 4 5 6 7
X
X X
X
X X X
X
X
1 2 3 4 5 6 7
X X
X X
X
X X
X
X
1 2 3 4 5 6 7
X X X
X X
X X
X
X
1 2 3 4 5 6 7
X
X
X X
X
X X
1 2 3 4 5 6 7
X
X X
X X
X X
23.98 Fps TC with 23.98Psf Trilevel sync
note switch 5 off is 23.98P progressive
24 fps TC with 24 Psf Trilevel sync
note switch 5 off is 24 P progressive
25 fps TC with 25 Psf /50 I Trilevel sync
note 1: switch 5 off is 25P , switch 5 off 6 on is 50P
note 2: switch 5 and 6 on is 24Psf
X
X
30 fps TC with 30 Psf /60 I Sony HD trilevel sync
note 1: switch 5 off is 30P switch 5 off 6 on is 60P
note 2: switch 5 and 6 on is 24 Psf trilevel
note 3: switch 3 on is 30 Drop TC.
X
X
29.97 fps TC with 29.97Psf/ 59.94 I Trilevel
note 1: switch 5 off is 29.97P switch 5 off 6 on is 60P
note 2: switch 5 and 6
on is 23.98 Psf trilevel
note 3: switch 3 on is 29.97 Drop TC.
7
Timecode with Trilevelsync Panasonic Varicam. (SMPTE 296) switch 4 off
1 2 3 4 5 6 7
X X X X X X
X
X
X
24 fpsTC with 60 P Panasonic trilevel sync
1 2 3 4 5 6 7
X
X X X X
X
X
X
X
23.93 fps TC with 59.94 P trilevel sync
X
X
25 fpsTC with 60 P Panasonic trilevel
1 2 3 4 5 6 7
X X X X X X X
1 2 3 4 5 6 7
X
X X X X X
X
1 2 3 4 5 6 7
X X X X X
X X
X
X
30 fpsTC with 60 P Panasonic trilevel
note 1: dipswitch 3 on is 30 Dropframe timecode!
X
X 29.97 fps TC with 59.94 P trilevel sync
Note 1: dipswitch 3 on is dropframe timecode
NOTES ON PANASONIC VARICAM MODE
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The Panasonic Varicam has 2 fixed recording rates
60P in Europe and PAL countries and 59.97P in USA and NTSC countries
All Integer timecode framerates (24, 25, 30 fps) will fit with 60 P
All non integer (pull down) framerates ( 23.97, 29.97Fps) will fit with 59.97P
The steady blink of the green Led on the Lockit will only occur when the TC
framerate selected exactly fits the video rate divided by two.
30
Fps timecode with 60 P
29.97 Fps timecode with 59.97P.
All other rates only match the video frame once every full second so the green led
will blink erratically as it measures out of phase. See Note 2
Note: also the camera will only accept these above framerates respectively on the
timecode input ie
In USA it must be 29.97 fps TC
In Europe it must be 30 fps.TC
This creates a difficulty in Europe as the most used framerate is 25 fps TC (PAL
compatible). The camera running at 60 P will not accept this framerate.
It needs 30 fps TC!
NOTE 1:
If one needs to use 25fps TC for syncing sound to picture the Lockit can be set to
25Fps TC with 60 P trilevelsync and the timecode put on an audio track. The
Varicam camera will then use record run TC at 30 Fps and the audio track code at
25 Fps can be used in Avid for syncing sound to picture. Note in this mode the
green led will blink erratically!
( 25fpsTC, 60P video)
NOTE 2:
This has been correctd on the december 2004 software update. The measurement
is done at the beginning of the second which is a valid sync point even if video
framerate is different form TC rate. Off course pull down rates will not be sync
with full integer frame rates. For example: 24 fps TC with 50I trilevel ---sync!
29.97 fps TC with 50I trilevel----no sync!
9
TRILEVEL LOCKIT ACL 202CT Hardware and software update January 2005
As of November 15th 2004 all Trilevel Lockits will be issued with the following
hard and software, Version 9.02, updates.
Hardware: REVERSE POLARITY PROTECTION ETC
Reverse polarity protection was implemented up to now with a diode in the
positive battery line. This diode has a voltage drop of 0.6 Volts.
In order to increase battery life the diode has been removed or bridged. The
reverse polarity protection is now a plastic snap cap on the positive pole of the
battery contacts. Batteries inserted the wrong way round will not make contact.
In tests using alkaline cells of normal quality (Duracell etc) we now get running
times of over 24 Hrs with video connected to a 75 Ohm load. Previously, running
times of about 15 hours were normal.
Software: NEW TIMECODE JAM MODE
Up to now after jamming the Lockit to timecode the timecode source had to be
removed or the Lockit would rejam every 5 seconds with a restart of the video.
The new software allows the TC source to remain connected to the Lockit box
and functions in the following way.
With TC connected the Lockit will jam only once and not rejam until the TC source
is disconnected for over 3 seconds. After 3 seconds of no TC at the input, the
redetection of a readable TC at the input will induce a rejam. Also Aaton ASCII is
locked out for 3 seconds.
Of course Timecode can be disconnected after jamming when the LED has gone
green.
•
The Lockit box can be used as a TC gearbox in a jam once and run
configuration that will hold sync fo about 0.5 hours. The Lockit box can be
set to desired frame rate and be jammed from another framerate
Most Crystal controlled machines are not more than 10 ppm different. In a
jam and run situation in which the Lockit and source were 10 ppm different,
a jam and run would lead to 0.5 Frame difference after half an hour at 30
Fps. In practice this will probably be much less especially if the TC source
used for jam also comes from a Lockit box.. Sync will only work if integer
and Pull down framerates are used together respectively. ie 24,25 30 Fps
together, and 29.97. 23.98 Fps together.
•
This feature can be used to jam the lockit once to a playback timecode
Using a transmitter and receiver on the Lockit box. The lockit will jam once
10
to the incoming playback timecode and also ignore RF dropouts of up to 3
seconds. Note Playback TC of a Video player is often jittery and cannot be
read by a camera. The Lockit delivers smooth code and sync
•
Remote rejam of all Lockits can be implemented in a multicamera shoot
using a TC transmitter and receivers on all cameras.
Software: INSERT USERBITS IN TC
• In normal operation dipswitch 7 is off and timecode jam is enabled. If after
jamming TC dipswitch 7 is set on then the Lockit will not rejam to externally
connected timecode but will extract userbits from this TC and insert them
in the Lockits running code without disturbing sync. The Led will blink
green in long bursts. In this way using an event number in the userbits of
an external timecode, all cameras can be userbit updated without
rejamming.
•
The following timecode configurations will extract Userbits from external
TC
Lockit box TC
24
25
30
1.2 Lemo socket
pin 1
pin 2
pin 3
pin 4
pin 5
External TC
Lockit box
TC
23.98
29.97
24, 25, 30
24, 25, 30
24, 25, 30
Ground
LTC in
ASCII in/out
6-16 volt input
LTC out
External TC
23.98, 29.97
23.98, 29.97
Tune reference out 1.92 MHz
1.3 LED Indicators
A. RED led on continuous. no blink. Battery empty or in rare cases latchup after
receiving false TC or ASCII signal. Change batteries or switch off/on to remove
latchup.
B. When Lockit is switched on Red led blinks normal 1 second intervals as
diagram D. This means generator time has started from 00.00.00.00. and has not
been set from an external source.
C. When lockit is set from external source Leds go to green with one second
Blink. when the unit is set again or TC jam sync repeats the Leds will go red then
green again.
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D. LED blink Table (Note: See new software notes for new jam and userbit
transfer
The red or the green Led show the state of the lockit unit
blink secs.
Normal
Batt. Low
1s
X
X
X
Video not X
sync w. TC*
X
Video. TC
async +
Batt low
X
New!
Jam lockout
Userbit insert
X
2s
X
3s
X
4s
X
X
X
X
x
X
X
X
X
X
x------------------x
X
X
X
x
X
X
( long, short,long)
== 5 Frames
====10 Frames
========1 Second
*When the Lockit is set it takes the video sync up to 10 seconds to sync up with
the timecode. During this time the lockit may show out of sync. the Xtal frequency
is shifted till the TC and Videosignal line up.
1.5 Batteries. Powering.
The Lockit is powered by 2 Mignon cells (3volts). It is recomended to use Alkaline
cells.The external power is connected directly to a 5 volt regulator and can have a
voltage of 6-16 volts.
If the Lockit is being powered externally, the internal batteries can be fitted and
act as backup if the external power is removed. With external power and batteries
switched on. the LED will blink normal 1sec if batteries are good, doubleblink if
batteries are bad (no backup)
Also note: Double blink with external supply and no batteries. Check batteries are
inserted for use with external powering and battery backup.
12
1.6 Setting the Lockit TC generator from external source
A. External timecode. See new Software notes for new jam mode
Insert an external timecode source 0.5 volts up tp 5 volts pp. With successful
Jamsync the leds will go from red to green or if they were on green will show
shortly red then green. If the external TC source is not removed on the green
Phase then the Jam sync will repeat every 5 seconds. Remove Ext TC early on
the green phase and make certain the green led blinks.
If Leds do not go red then green, Check cable and TC voltage Level. Note: Xjam
only time transferred timecode as selected with dipswitches.
Note: NEW SOFTWARE from December 2004. in the new software the tc can
remain connected. The Lockit will not rejam until the TC has been absent for 3
seconds. See New software notes for details.
Note: If the lockit loses sync through loss of power one can use the machine it is
coupled to, to resync with timecode. Even if the machine has a drift of several
frames an hour, there will not be a frame lost if the Lockit is rejammed within one
minute. However it is best to rejam the lockit with one of the clockit units running
in the system to avoid errors.
B. Setting with Aaton Origen C. or Ambient Controller**.
The Lockit and all clockit units are Aaton compatible. The Lockit is connected to
the Origen C or Ambient Controller with an Ascii cable and setting and time code
comparisons can be carried out. After setting the led goes green. Remove Ascii
cable.
**The ASCII protocoll does not transfer Framerates only time. Thus when setting
with Aaton the Dipswitch framerate must be set to the Framerate required. The
timecode will be generated at the framerate set by the dipswitches.
8535
1.7 Dimensions Input/output voltagesS
• Size
100mm X 74mm X 26mm
• Weight
250 Grms without batteries
• TC input
0.1 t0 5 volts pp
• TC output 1 volts pp
• Video out 0.4volts pp on 75 Ohm
1.8 Accessories
• Timecode Cable in XLR F / Lemo 5. Timecode Cable out XLR M / Lemo 5
• Timecode Cable in BNC / Lemo 5 (To jam from Digibeta camera with BNC
output socket)
Ambient Recording Gmbh, Schleissheimer str 181c D-80797 Munich, Germany
Tel int 49 89 6518535. FAX 6518558 Email info@ambient.de.
Internet www.ambient.de www.ambientaudio.com
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