User manual ECLAIR ACL II

SOREMEC - CEHESS Department "ECLAIR INTERNATIONAL" 41-45, rue Galilee - 75116 Paris Tel: 723.78.56 + Telex: 610 663 F ECLAIRE Cable: ECLAIRCAM PARIS 2 Technical Characteristics Weight: 4.3 kg without lens Overall dimensions: 275 x 180 x 160 mm, without lens (11" x 7" x 6" 1/2) Capacity: pre-loaded 60 meter (200ft) or 120 m (400ft) snap-on magazine 16mm film: · double or single perforation · A winding (emulsion out) · B winding (emulsion in) · on 50 mm (2 in) core-120 meter rolls · on 30 or 60 m (100 or 200 ft) daylight loading spools Climatic conditions: Temperature - 20° C (4° F) to + 60° C (140° F) Humidity: up to 95% RH Film Transport: claw movement controlled by an excentric and a fixed cam. Reflex veiwing: by a half-speed oscillating mirror. Shutter: plane type with a 175° opening. Viewfinder: for left and/or right eye, rotatabhle through 360° with image re-erected, dioptry adjustment and eyepiece shutter. Gelatine holder: built-in and positioned between the C mount and the reflex mirror. Lens Mounts: in C mount, screwed directly on the camera, in Cameflex, Arriflex or Nikon mounts, adapted to the camera by means of intermediate mount. Exposure indicator: by 7 LED (light emmitting diodes) in vertical display seen in the viewfinder. Motor: 12 volts multiduty type, brushless, Hall effect, 6 crystal controlled speeds 8, 12, 24, 25 50, 75 frames per second. Automatic stop in viewing position. Power consumption: from 0.8 to 1.2 Amps at 12 volts (20 C to 68° F) Batteries: 12 volts MIBAC type: weight 0.640 gr (1.5 lbs) (capacity 1.2 ah); rechargeable in less than 30 minutes equivalent to eight to ten 60 m magazines or 12 volts BAKEL type: weight 1.650 kg, capacity 4 ah equivalent to ten to fifteen magazines Noise level: Quiet functioning that permits sync, filming without any blimp. Flat base: standard 3/8"x16 threads per inch taping for using a tripod or a polo stick. Hand-grip: adjustable lateral type with "ON/OFF" micro-switch. Standard screw: on top of the camera for attachment of accessories such as handle, boost lighting mike support, etc. 3 DESCRIPTION THE CAMERA HEAD (Code MIPEX) The camera head (Fig A) in special aluminum alloy supports the lens mounts (1) in stainless steel, the interchangeable gelatine-holder (2), the reflex viewfinder (3), the motor (6) with its control for electronics (7), the electronic base (8) incorporating the sliding on/off switch (32), the lateral support (75) of the hand-grip (36) with its micro-switch (76), the magazine lock release lever (16) with its safery catch (17) and the removable hand-grip (36). On the rear (Fig B): the mechanism plate (9) on which are mounted film gate (10), the fixed guide bar (11) and its side pressure bar (12), the magazine drive shaft (18), the 4 pin power supply socket (19) for connection with the battery, the clapper switch (20) and the potentiometer (34) of the exposure indicator. Inside: the claw mechanism (13), the oscillating mirror (14), the plane shutter (15) and the exposure indicator unit. The snap-on 60m, or 120m magazine are attached onto the camera head as well as the fixed focal or zoom lenses. NOTA. The above camera head can be supplied without Exposure indicator unit; its commercial code is MITAN. 2 3 29 30 17 16 9 1 14 10 11 12 13 6 18 34 19 20 Fig. B Camera head rear view. Viewfinder positioned for the right eye. 75 76 7 32 8 Fig. A Camera head front view. Viewfinder positioned for the left eye. 4 THE MULTIDUTY MOTOR (MIVAR) This brushiess motor (6) has a very high efficiency (from 0.8 to 1.2 amp. consumption at 12 volts to drive the camera at 20°C (68° F) and has permitted a weight reduction not only in the camera but also in the battery (37) - page 12 - which weighs only 640 grammes enabling one hour of filming between recharges, i.e. eight to ten 60 m magazines. The incorporated electronics (7) control the sync. speed by crystal ; changing from 24 to 25 f.p.s. or vice-versa is made by shifting switch (38) so that the white spot mark is adjacent to the desired speed. Others speeds : 8.12.50 and 75 are obtained by setting the engraved button 35 accordingly. The MIVAR will stop the camera automatically in viewing position, i.e. the mirror being in the aperture axis allows the cameraman to frame and focus without loss of time. See pages 24 and 30. The motor will only operate when it is attached to the camera. The lamp (47) on the motor lights up until the marked speed is attained. In the event of speed reduction (flat battery for 6 47 38 35 7 Fig. D. - Front part of the MIVAR. 7 38 35 47 6 Fig. E. - Rear part of the MIVAR. 5 THE 60 m MAGAZI N E The two chambers of this snap-on coaxial magazine are separated by a median partition and are connected by a light tight ramp for the passage of the film from the feed side to the take-up side (Fig F). THE 120 m MAGAZINE Bearing in mind the versatility and light weight of the 60 m magazine which can be changed almost instantaneously, there are occasions where a « long take » in excess of 60 m is required and for this purpose a 120 m capacity magazine is available. This co-axial magazine retains all the characteristics of simple threading and snapon action for which the Eclair equipment is famous. Fig. G Fig. F Fig. H Fig. I 6 36 Fig. J THE HAND-GRIP The portability of the ACL is increased by the use of the hand-grip (36) supplied with the camera. Adjustable in the horizontal and the vertical plane, it permits the choice of the most confortable position. It can be screwed either under the camera base or on the right hand side of the camera (fig K). To carry the camera, the hand-grip (36) with its knurled knob (79) - fig. QR - can also be screwed on top of the camera head. MOUNTS AND LENSES The ACL has been designed to accept « C » mount lenses (fig Q, the mechanical back focal distance of which are 17.52 mm, and also other professional mounts such as Eclair CA (fig M) Arriflex, Nikon, etc... the mechanical back focal distances of which are greater than 17.52 mm. 75 Fig. K 48 mm Ca mechanical back focal distance C mechanical back focal distance 17.52 mm 26 24 Film plane 25 Fig. L Lens in C mount Fig. M Lens in CA Eclair mount Fig. N Intermediate mount 7 The mechanical back focal distances (fig N) being different according to the professional equipment manufacturers 48 mm for ECLAIR (Eclair CA), 52 mm for Arriflex, 46 mm for Nikon, corresponding intermediate Eclair TS mounts (Fig P-P'-P"-) can be supplied for these different makes of lenses for use with the ACL camera. For Arrif lex, specify « normal mount » or « new steel bayonet mount ». Hence, the ACL lens support (1) comprises an internal threading (21) the diameter and the thread pitch or which correspond to the C lenses standards and an external threading (22) for the Eclair TS mounts (Fig P-P'-P"); the orientation of the lens is ensured by the slot (23) at tfie top of the flange. Fig. P Intermediate mount for lenses in CA mount Fig. P' Intermediate mount for lenses in Arriflex mount Fig. P'' Intermediate mount for lenses in Nikon mount ACCESSORIES The principal additional accessories of an "ACL" equipment are : · The 12 volts battery type VR 1,2 Code MIBAC · The connection cable camera/battery VR 1,2 ............. MIBLE · The rapid charger ............................... MIRAP or · 12 volts battery type VR 4 .................. BAKEL · The connection cable Camera battery VR 4 ............... BABAC · The compact charger ......................... CIBRE · The connection cable Charger/battery ........................ COURE · The pilotone module ........................... MODUL · The connection cable Module/recorder (according to the make of the recorder) · The transport case .............................. MALAC 23 21 1 22 Fig. O 8 GENERAL INFORMATION REFLEX SIGHT The reflex image is obtained with an oscillating mirror (14) moving at half camera speed, which transmits the image formed by the lens onto the ground glass during the descent of the film. The viewf inder (focussing tube) is a new mechanical /optical realization which gives an exceptionally bright image. As on the Eclair 16, the ground glass gives a field of view greater than the recorded image, which eliminates the possible intrusion of microphones, etc... into the recorded picture. (Fig Q). This viewfinder - 10 x enlargement can be used for left eye or right eye viewing it can pivot through 360' parallel to the camera thus allowing the cameraman to frame and to focus in the most comfortable conditions whatever the position of the camera; for example, he can shoot with his back facing the subject. The eyepiece is adjustable of ± 5dioptres. The standard ground glass is engraved with the 16 mm frame (10,2 x 7,4 mm), the TV frame and a cross in the centre (UER standard). Gelatine filter holder Each ACL is equipped with a gelatine holder 2 (Fig A and R) which is located between the C mount and the reflex mirror close to the rear element of the taking lens. Its advantages are : · It is not necessary to change filter at each lens change. · It is possible to check the presence and type of gelatine through the viewf inder. · It eliminates the requirement for front glass filters for each lens diameter, the price of which is very high compared to that of gelatine filters which are readily obtainable. · Its position, away from the fi I m plane ensures any small dust or finger marks on the gelatine that may occur are out of focus on the final result and rarely visible. Shutter Contrary to reflex cameras in which the mirror mounted at 45' acts as a shutter, the ACL has a plane shutter of large diameter completely independant of the mirror (14). It is placed very close to the film plane with an opening of 175'. Cutting the image in the direction of the smallest dimension gives a perfect exposure, maximum definition and reduction of jerky effect on some panning shots. The exposure time is 1 /51 of a second at 25 frames per second and 1 / 49 of a second at 24 frames per second (page 33). 27 2 Fig. R + 0 Fig. Q 9 Mechanism The complete silent mechanism is mounted on the mechanism plate which greatly reduces the time required for the normal overhaul and cleaning which we would strongly recommend to be carried out by one of our agents. The claw movement (13) is controlled by an excentric and a fixed cam (39), the security is ensured by a counter-cam. The four drive shafts run in selflubrificated bearings and the camera mechanism should NEVER be oiled. As already indicated page (4), the aperture plate of hard chromium-plated steel has, on the left, a fixed guide (11) which is the edge reference for the film and a spring loaded guide (12) on the right, which maintains the film against the fixed guide. The two guides (29-30) fig B position the magazine nose onto the mechanism plate. Fig. S 13 14 39 Exposure indicator The ACL camera had to have a very safe « Exposure Indicator device » because of the professional work it must ensure. It could not be question of an ordinary photocell system due to the fragility of moving parts; on the other hand, a 100% automatic device leaves the cameraman no change of artistic creation. The basic idea is to leave the cameraman freedom to determine the exposure of the film and thus give him the possiblility of working according to his own technique; in other words he must have the possibility of adjusting the diaphragm if he needs a special effect by under or over exposure, e.g. contrast. Before filming, the operator sets the exposure indicator with the aid of his professional photo- cell exposure meter indicating the diaphragm opening (stop) of the lens; it gives him a reference lighting intensity « EO ». The camera being connected to the battery, he adjusts the sensitivity potentiometer (34) so that only the middle diode EO, visible in the viewfinder, lights up. Thus the camera is now matched to the exposure meter. During filming, if the lighting intensity of the subject varies, the control diodes visible in the viewf inder will be seen light up either + or . The operator wiII then correct the diaphragm of his lens so as to maintain the lighting intensity on the film to a value of EO, if he deems it necessary. 10 ELECTRONIC BASE 150 E This unit (8) forms a flat base for the camera body and consists of: · 1 Jaeger socket (19) for power supply to the camera. · 1 Sliding on/off switch (32) at the front part. · 1 Cannon socket (33) for the accessory power supply. · The stabilized 5 volt supply. · 1 Souriau socket for electrical connections with the camera head. · 1 sensitivity potentiometer (34) for adjustment of the exposure indicator. · 1 Clapper switch (20). This flat base is provided with the standard congress 3/8 tapped hole for tripod mounting or hand- grip mounting (36). PILOTONE MODULE 34 19 20 8 33 Fig. X 8 32 Fig. X' Magnetic recorder side Fig. Y The ACL servo-control led crystal motor allows the shooting of sync. sound without any cable connection between the camera and the tape recorder if the latter is equipped with a crystal controlled motor (e.g. Nagra 4, Perfectone E P 6 A2, Stellavox). Such a system (diagram KL) does not permit the use of the clapper. If, however, the two units Camera and recorder are connected by a cable, the clapper will function (diagram L M). See additional information page 29 for connection and use. When the recorder has no crystal, the synchronization can be ensured by using the Eclair pilotone- module (option) which contains its own signal. THE ECLAIR PILOTONE MODULE is contained in a metal cover. Its size: 92 x 66 x 23 mm is slightly larger than a packet of 20 cigarettes (fig. Y and Z). it is a crystal pilot f req uency generator 50-60 and 100 H Z. Camera side Fig. Z 11 THE BATTERY (MIBAC) The low torque ot the camera and the high efficiency output of the motor have allowed the construction of a low power battery (1,2 amp-hour) which at 20°C (68°F) provides power for ten 60 m (200 ft) magazines i.e. for about 600 meter of film. This battery (37) weighs less than 1-4 lbs (640 grammes). It is a Saft type VIR 1.2 ten cell cadmium-nickel which is enclosed in a polyurethane case (48) fig. AB. The battery is equipped with a textile shoulder strap although its small size will allow it to be slipped into a coat or trousers pocket. The connections with the camera and the pilotone-module can be made from either of the Jaeger 4 pin-sockets (49). The central Socapex socket (50) is provided for the rapid charger. CABLE. The same type of cable (MIBLE) is required for connecting the camera, the battery and the pilotone-module. It is fitted with two Jaeger plugs ref : No 530800. Our V.R. mini-cell battery has been conceived for a recharge in less than 30 minutes by means of our MIRAP charger connected to the mains between 115 and 220 volts A.C. THE CHARGER (MIRAP) The MK2 charger specially made for our MIBAC battery is automatic and very simple to use. It ensures a charge feed regulation of ± 20 % for a variation of the main supply tension of ± 10 %. It stops the high speed automatically as soon as the battery has attained a tension which is related to the charge rate and the temperature of the battery. The cut-off precision is approximately 1 Immediately after the high speed charge has been cut-off, the charger switches automatically to the low charge rate. The thermostatic protection is ensured by a thermal limiting device which cuts off the charge if the battery temperature becomes abnormaly high e.g. because of irregularity in the cut off safety circuit Diagram CD 48 Diagram DE Fig. AB 49 50 49 37 Fig. BC 12 BATTERY (BAKEL) CHARGER (CIBRE) If a battery having a larger capacity than the MIBAC battery is desired, especially if the camera is often used at higher speed than the standard, we can supply the BAKEL battery (of the Eclair NPR 16) type VR 4 (4 amp-hour). It is a 12 volts cadmium-nickel battery - Fig EF - with a discharge controller (Schoeller galvanometer) and is supplied in a plastic box made of unbreakable black polyethylene with a carrying textile belt. It is composed of 10 insulated cells SAFT type and weighs 1,650 kg; its dimensions are 230 x 150 x--40-mm and its capacity is equivalent to ten to fifteen 120 m (400 ft) reels. Its use necessitates a connection cable « Camera/ Battery » (BABAC), a 220/110 v 12 V charger (CIBRE) and a connection cable « Charger-battery » (COURT). The BAKEL battery can be also suppl ied in a leather belt with built-in charger, its code is BACHA. Its weight 2.750 Kg; only the connection cable « Camera/ Battery » (BABAC) is necessary. The new compact charger CIBRE type 76 is very smal I : 125 x 64 x 40 mrn and weighs only 420 grammes. An internal tension selector permits its utilization on 220 or 110 volts; safety is ensured by a 500 mA fuse. A 2 metre connection cable « Main/Charger » is supplied. The CIBRE charger bears, at one end, a 3 pin socket (mains side) and at the other end a 4 pin Amphenol socket for connection to the battery; two control lamps : one red and one green light up as soon as the charger is connected to the main. The green light cuts off when the load is over. The select the voltage in the charger (110 or 220 volts) or to replace the safety fuse, unscrew the 4 screws of the lid ; take- off the lid without dropping the screws, select the tension or replace the fuse, put the lid back and tighten the screws. Fig. EF Fig. GH Fig. FG CARRYING CASE Made in shape of a rigid suit-case(fig GH) and not like an ordinary transport case, the framework is anodized aluminium supporting two shells in ABS which is a very high impact resistance material. The inside is entirely padded with expanded polyethylene cut out to the form of a complete ACL equipment : Camera with motor, viewfinder and 60 m or 120 m magazine mounted, extra 60 or 120 m. magazine, battery, charger, cables, pilotone module and miscellaneous (fig. HI). Fig. HI 13 CABLES AND PLUGS Taking into account the preceding information, will you please find hereafter diagrams that will help you to understand easily the instruction manual; they will also help you should you have to order cables or plugs you may need. Diagram JK 1 - JAEGER female socket 2 - CANNON female plug 3 - CANNON female plug 4 - CANNON male plug 7 - CANNON male plug 8 - JAEGER male plug 9 - JAEGER cable flange 10 - JAEGER female socket 11 - JAEGER male plug 12 - JAEGER cleat 13 - TUCHEL plug 14 - TUCHEL plug 15 - Jack 16 - PREH plug 533800 MDB 19 SH 031 MD 19 SH 031 MDB 19 PH 031 MD 19 PH 031 530800 530332 533272 530273 530371 3401/1 ou /2 3300/1 ou /2 PL 55 7140-4-250 Camera-battery-module Camera Camera Motor Handgrip side support Mible feed cable Mible feed cable Module Sync. cable Sync. cable Sync. cable for NAGRA III Sync. cable for NAGRA IV Sync. cable for PERFECTONE EP6 A II Sync. cable for STELLAVOX A - Feed cable B - Connecting cable battery/camera C - Sync cable Nagra iii D - Cable Nagra IV E - Sync. cable Perfectone EP6 A II F - Sync. cable Stellavox G - Sync. cable Uher (*) H - Feed cable mains to battery charger (*) In case of « Uher 1000 Report » recorders state serial number of the machine. 14 UNITS CONNECTIONS Schema KL Schema LM Equipment · Camera with crystal controlled motor · Recorder with crystal controlled motor Possibilities Sync. without connection cable No clapper Equipment · Camera with crystal controlled motor · Recorder with crystal controlled motor Possibilities Sync. with connection cable Clapper Schema MN Schema NO Equipment · Camera with crystal controlled motor · Recorder with crystal controlled motor · Pilotone module fed by the camea battery Possibilities Sync. with connection cable Clapper Equipment · Camera with crystal controlled motor · Recorder without crystal controlled motor · Pilotone module fed by an external power supply: MIBAC 12 volts battery whenever possible (shunt 3 and 4 by the Jaeger plug) Possibilities Sync. without connection cable No clapper 15 16 INSTRUCTION MANUAL When you receive your equipment for the first time we recommend you examine every unit individually in accordance with the information given in this brochure. After that, you will be able to follow the instructions for use more easily. 2nd PART - MOUNTING AN ECLAIR "CA" MOUNT LENS · Remove the protective cap and the guard ring. · Remove any dust from the flange with your finger. · Locate the intermediate TS-CA mount (fig. P) on the lens support plate ensuring that the locating pin (24) enters the slot (23) of the flange. · Screw up the retaining ring (25). · Position the lens so that the slot (26) in the CA mount is vertical. 9 Push the lens into the TS intermediate mount and lock by turning the lens clockwise. As you will notice the Eclair intermediate TS mount is exceptionally robust with a large locating diameter and thrust face. The use of lens supports with the mount is not necessary. It is strongly recommended that each zoom lens is fitted with an intermediate TS mount to prevent the deterioration of the limit stops on the lens after repeated locking in place on the camera. MOUNTING A "C" LENS · Remove from the camera the protective cap of the lens mount. · Remove from the lens the cap protecting the thread. · Remove any dust from the flange with your finger. · Screw in the lens in 21. Fig. 0. If the distances and stops engraved on the lens barrel cannot be read by the cameraman in the normal operating position : take the lens off the camera. The threaded ring at the bottom of the lens is mounted in contact with a special spring washer. Without touching the rear lens element, press down firmly on that threaded ring and turn it to modify the orientation of the distances and stop marks with respect to the thread start. 17 DIOPTRY ADJUSTMENT OF THE VIEWFINDER Legend of the external parts of the viewfinder: Ll - Eyepiece with shutter and rotatable rubber eyecup. L2 - Control ring of eyepiece shutter. L3 - Locking knob of the dioptry adjustment ring. L4 - 360' rotatable viewf 1 nder unit. L5 - Eyepiece support with rocking motion for left and right eye sight. L6 - Locking ring of the rotation of the eyepiece support. L7 - Adjusting ring for partial positioning of the ground glass image. L8 - Clutch for final adjustment of the ground glass image. Everyone having a different keenness of sight, it is necessary for the camera user to set exactly and then lock the dioptry adjustment which corresponds to his vision. This can be done with or without lens mounted on the camera. Adjustment with a lens: 1. Place L5 to the right or to the left according to the eye you normally use. 2. Make sure that the reflex mirror is in the front of the aperture, if not, turn knurled button 31 which controls the motor axle (see page 24, par. 5) 3. Turn control ring L2 to open the eyepiece shutter. 4. Focus the lens on infinity. 5. Diaphragm wide open or slightly closed to darken the ground glass. 6. Loosen knob L3 and turn slowly in one way and in the other the dioptry control ring until the frame and cross engraved on the ground glass are perfectly sharp. 7. Take note of the number of dioptries in + or - that corresponds to your sight. Lock the dioptry control ring in that position by tightening the button L3. This setting should always be kept as it will permit you to focus sharply at any distance. Fig. PQ 18 GELATINE HOLDER Adjustment without lens : Direct the camera towards a well lighted part (sky, for example) and follow the preceding instruction 1-2-3-6- and 7. Instruction for use Position L5 for your left or your right eye, as needed. Make sure the dioptry adjustment is correct and the button L3 is perfectly tightened. If the image on the ground glass is not optically horizontal, turn ring L7 in one way or the other to level the image. If you.come to the thrust before the image is in the right position, turn L8 in the reverse way and move again L7. Once the image has been so erected the viewf inder can be pivoted through 3600, a Wollaston prism will keep it in the correct position. If you shift L5 from left to right or viceversa the image will reverse gradually until it is up side down; just turn L8 to declutch L7 and turn same to reset the image to its normal position. A positioning "clic-stop" is provided in L6 to set the eyepiece Ll in horizontal and vertical positions. Fitting a gelatine to the holder · Pull out the gelatine holder · Open the holder by pressing the button (27) · Place a 2" margin (5Ox5O mm) gelatine in the holder and close it. · Cut the gelatine closely to the shape of the holder with a razor blade. · Replace the holder in the camera, chamfered side forward. · The correct positioning of the holder can be verified by checking that the aperture is concentric with the C mount aperture. NB. Never place more the one gelatine in the holder. Always film with the holder in place (with or without a gelatine) to avoid the possible fogging of the film. The fact of filtering behind the rear element of the taking lens may cause a slight alteration of the focussing distances engraved on the lens which will be automatically compensated if focussing is done through the reflex viewfinder. FITTING THE HANDGRIP Under the camera : · Screw the handgrip support - Fig. QR into the electronic base using the knurled ring (27) · Fix the handgrip (36) in the hole (80) of the support. · Loosen the ring (79), set the position of the handgrip and tighten the ring (79). · Loosen the half-moon (81), set the handgrip at the desired angle and retighten lock (81). Onto the right hand side of the camera: · Fix the handgrip (36) to the side support (75) and lock it in the best position by means of lock (81). NB. The unit (79-80) - Fig. QR - is not used in this case. Fig. RS Fig. QR 81 36 Fig. ST 79 75 77 76 80 82 78 19 77 FUNCTIONS OF THE ELECTRONIC BASE 150 E a) On/off switch (32) This is a double action switch : it puts under tension the diodes of the exposure indicator, without starting the camera. Or it sends the power supply to the motor to start the camera. tee page 24 detailed instruction. b) The clapper switch (20) In the central position this switch provides no clapper. In outside right position : the clapper is automatic and provides fogging of the film for 0,3 secondes at each start. In inside left position : the clapper functions (0,3 seconds) at every manual pressure when the camera is running; this allows, for example, to clap at the end of filming, before switching off the motor. Schema UV 32 Thus, the clapper ensures two functions 1 0 - Automatic fogging of the film during 0,3 seconds at each start of the camera or manually at any moment. 20 - The supply of an 8 volt signal to the battery during 0,3 seconds (bloop) if the pilotone module is connected to the battery and the recorder, the signal triggers a 1 Kc signal on the recording tape. c) The running signal: A 12 volt signal available from the Jeager socket supplies the pilotone module and ensures that the module only produces a 12 volt signal when the camera is running. This signal can also be used to start a sound recorder from a distance. Fig. TU To see the big-ass view go to page 35! d) The output signal : 1 - Tachometric signal This 3,8 volts square signal (peak to peak) is supplied by the motor. Its frequency is given by the motor speed multiplied by 40, that is to say 1000 Hz for 25 images per second and 960 Hz for 24 images per second. This signal directly supplied by the motor can be used for various purposes after it has been divided. 2 - Crystal signal (for MIALA motor only) : This is a 100 mV sine signal (peak to peak). Its frequency is 1024 KHz for 25 frames per second and 983.04 KHz for 24 frames persecond. Schema VX 20