Robert Juliat OZ 1169TC User manual

600 W FOLLOWSPOTS
LED FOLLOWSPOTS
DN41135200-C
Manual
Model Standard North American
7 – 14,5° OZ 1169TC OZ 1169CTC
13 – 24° ALICE 1469TC ALICE 1469 CTC
Model Standard North American
7 – 14,5° OZ 1169 OZ 1169C
13 – 24° ALICE 1469 ALICE 1469 C
Robert Juliat S.A.S. 32, rue de Beaumont, F 60530 Fresnoy-en-Thelle - phone : [phone] - fax : [phone] - [email protected]
www.robertjuliat.com
D ate: 2 7/ 06/ 2 2
V2
FIRMWARE: V2.09
OZ 1169TC / ALICE 1469TC (TOP CONTROL) OZ 1169 / ALICE 1469

Robert Juliat reserve the right to change or alter any of the items detailed on this page,
to increase or improve manufacturing techniques without prior notice.
Table of Contents
1 User’s instructions ..............................................................................................................................................................................................................................................................................1
2 Presentation ........................................................................................................................................................................................................................................................................................2
2.1 Functions ................................................................................................................................................................................................................................................................................ 2
2.2 Identication label ................................................................................................................................................................................................................................................................ 3
2.3 Accessories included.............................................................................................................................................................................................................................................................. 3
2.4 Optional accessories............................................................................................................................................................................................................................................................... 4
3 Set-up ...................................................................................................................................................................................................................................................................................................5
3.1 Mechanics................................................................................................................................................................................................................................................................................ 5
3.1.1 Operating positions .........................................................................................................................................................................................................................................................................................5
3.1.2 Minimum distance between a ammable material and the lighting unit.......................................................................................................................................................................................5
3.1.3 Instructions for use...............................................................................................................................................................................................................................................................................................5
3.1.4 Lifting................................................................................................................................................................................................................................................................................................................... 5
3.1.5 Stand set-up....................................................................................................................................................................................................................................................................................................... 6
3.2 Electrical information............................................................................................................................................................................................................................................................. 7
3.2.1 LED source ...........................................................................................................................................................................................................................................................................................................7
3.2.2 Power supply.......................................................................................................................................................................................................................................................................................................7
3.3 DATA...................................................................................................................................................................................................................................................................................................................................8
3.3.1 Data 512-A / RDM .............................................................................................................................................................................................................................................................................................8
3.3.2 Art-Net / sACN .................................................................................................................................................................................................................................................................................................... 8
3.3.3 Ethernet / DMX mode.......................................................................................................................................................................................................................................................................................9
3.4 Accessories ........................................................................................................................................................................................................................................................................... 10
3.4.1 Full closing iris cassette.................................................................................................................................................................................................................................................................................10
3.4.2 Colour changer unit - boomerang (only available for OZ) ..................................................................................................................................................................................................................10
3.4.3 Colour changer unit - push-pull (ALICE)....................................................................................................................................................................................................................................................11
3.4.4 Gobo holder.....................................................................................................................................................................................................................................................................................................11
3.4.5 Double slot front cassette..............................................................................................................................................................................................................................................................................12
3.4.6 Frosted / CTO glass..........................................................................................................................................................................................................................................................................................12
3.4.7 Internal glass holder ......................................................................................................................................................................................................................................................................................13
3.4.8 Horizontal chopper.........................................................................................................................................................................................................................................................................................13
3.4.9 Stands...........................................................................................................................................................................................................................................................................................................14
3.4.10 Heavy duty adjustable yoke..........................................................................................................................................................................................................................................................................14
3.4.11 Telrad followspot sight ...................................................................................................................................................................................................................................................................................14
3.4.12 Flight-case .........................................................................................................................................................................................................................................................................................................15
4 Operations .........................................................................................................................................................................................................................................................................................16
4.1 Light intensity ...................................................................................................................................................................................................................................................................... 16
4.1.1 Range ...................................................................................................................................................................................................................................................................................................................16
4.1.2 Control...................................................................................................................................................................................................................................................................................................16
4.1.3 Parameters .......................................................................................................................................................................................................................................................................................... 16
4.1.3.1 Dimming resolution....................................................................................................................................................................................................................................................................16
4.1.3.2 Dimming curve.............................................................................................................................................................................................................................................................................16
4.1.3.3 Master control ..............................................................................................................................................................................................................................................................................17
4.1.3.4 Set maximum position...............................................................................................................................................................................................................................................................17
4.1.3.5 Sensitivity ......................................................................................................................................................................................................................................................................................17
4.2 Strobe ..................................................................................................................................................................................................................................................................................... 18
4.2.1 Range ...................................................................................................................................................................................................................................................................................................................18
4.2.2 Control...................................................................................................................................................................................................................................................................................................18
4.3 Response time ....................................................................................................................................................................................................................................................................... 18
4.3.1 Range ...................................................................................................................................................................................................................................................................................................................18
4.3.2 Control...................................................................................................................................................................................................................................................................................................18
4.4 Beam size adjustment .......................................................................................................................................................................................................................................................... 19
4.4.1 Range ...................................................................................................................................................................................................................................................................................................................19
4.4.2 Control.................................................................................................................................................................................................................................................................................................................19
4.5 Pan / Tilt...........................................................................................................................................................................................................................................................................................................................20
4.5.1 Range . ..............................................................................................................................................................................................................................................................................................................20
4.5.2 Control..................................................................................................................................................................................................................................................................................................................20
4.6 Iris.....................................................................................................................................................................................................................................................................................................................................21
4.6.1 Range....................................................................................................................................................................................................................................................................................................................21
4.6.2 Control .................................................................................................................................................................................................................................................................................................................21
4.7 Gobo................................................................................................................................................................................................................................................................................................................................21
4.7.1 Range....................................................................................................................................................................................................................................................................................................................21
4.7.2 Control..................................................................................................................................................................................................................................................................................................................21
4.8 Colour..............................................................................................................................................................................................................................................................................................................................22
4.8.1 Range....................................................................................................................................................................................................................................................................................................................22
4.8.2 Control..................................................................................................................................................................................................................................................................................................................22
4.9 Frost and correction lters......................................................................................................................................................................................................................................................................................23
4.9.1 Range....................................................................................................................................................................................................................................................................................................................23
4.9.2 Control..................................................................................................................................................................................................................................................................................................................23
4.10 Horizontal chopper....................................................................................................................................................................................................................................................................................................24
4.10.1 Range .................................................................................................................................................................................................................................................................................................................24
4.10.2 Control ...............................................................................................................................................................................................................................................................................................................24
5 Controls and parameters ................................................................................................................................................................................................................................................................25
5.1 Local display and controls ................................................................................................................................................................................................................................................... 25
5.1.1 Display................................................................................................................................................................................................................................................................................................................25
5.1.2 Menu...................................................................................................................................................................................................................................................................................................................26
5.1.3 Parameters ........................................................................................................................................................................................................................................................................................................27
5.2 DMX512 - A remote control.................................................................................................................................................................................................................................................. 28
5.2.1 Protocol........................................................................................................................................................................................................................................................................................................28
5.2.2 Conguration .............................................................................................................................................................................................................................................................................................28
5.2.3 Parameters ..................................................................................................................................................................................................................................................................................................28
5.2.3.1 DMX Hold.......................................................................................................................................................................................................................................................................................28
5.2.4 DMX chart....................................................................................................................................................................................................................................................................................................29
5.2.5 DMX ranges................................................................................................................................................................................................................................................................................................. 29
5.2.5.1 Strobe duration............................................................................................................................................................................................................................................................................ 29
5.2.5.2 Strobe speed .................................................................................................................................................................................................................................................................................29
5.2.5.3 Response time ..............................................................................................................................................................................................................................................................................29
5.2.5.4 Control mode................................................................................................................................................................................................................................................................................ 29
5.3 RMD remote control ............................................................................................................................................................................................................................................................. 30
5.3.1 Protocol........................................................................................................................................................................................................................................................................................................30
5.3.2 Functions: ....................................................................................................................................................................................................................................................................................................30
5.3.3 Parameters ON/OFF..................................................................................................................................................................................................................................................................................30
5.4 Art-Net remote control......................................................................................................................................................................................................................................................... 31
5.4.1 Protocol........................................................................................................................................................................................................................................................................................................31
5.4.2 Conguration .............................................................................................................................................................................................................................................................................................31
5.5 sACN remote control ........................................................................................................................................................................................................................................................... 32
5.5.1 Protocol........................................................................................................................................................................................................................................................................................................32
5.5.2 Conguration .............................................................................................................................................................................................................................................................................................32
5.6 Fan cooling modes............................................................................................................................................................................................................................................................... 33
5.6.1 Range............................................................................................................................................................................................................................................................................................................33
5.6.2 Control..........................................................................................................................................................................................................................................................................................................33
5.7 Gel fan modes ...................................................................................................................................................................................................................................................................... 33
6 Service ................................................................................................................................................................................................................................................................................................33
6.1 Preventive maintenance ...................................................................................................................................................................................................................................................... 33
6.1.1 Frequency ..........................................................................................................................................................................................................................................................................................................33
6.1.2 General cleaning..............................................................................................................................................................................................................................................................................................33
6.1.3 General visual check .................................................................................................................................................................................................................................................................................33
6.1.4 LED source .........................................................................................................................................................................................................................................................................................................33
6.1.5 Optics..................................................................................................................................................................................................................................................................................................................34
6.1.6 Inner fans & LED glass protection cleaning..............................................................................................................................................................................................................................................34
6.2 Analysis................................................................................................................................................................................................................................................................................. 34
6.3 Local potentiometer............................................................................................................................................................................................................................................................ 35
6.4 Electronic thermal management system.......................................................................................................................................................................................................................... 36
6.5 Firmware update ................................................................................................................................................................................................................................................................. 36

EN
Group risk 2. Luminaires should be positioned so that
prolonged staring into luminaire at a distance closer than
30m (Oz) & 19m (Alice) is not expected.
EN - 1 -
GENERAL INSTRUCTIONS
1. Not for residential use.
2. These fixtures must only be serviced by a qualified technician.
3. In addition to the instructions indicated on this page, relevant health and safety requirements of the appropriate EU
Directives must be adhered to at all times.
4. This fixture is in compliance with section 17 - Lighting appliance for theatre stages, television, cinema and photograph studios.
Standards NF EN 60598-1, NF EN 60598-2-17, Low Voltage Directive 2014/35/UE & EMC Directive 2014/30/UE.
5. This fixture is rated as IP20, and is for indoor use only.
FIXTURE
6. Ensure fixture is correctly mounted on an appropriate support.
7. Protection screens and lenses must be replaced in the event of any damage, such as cracks or deep scratches, since these might
reduce performance.
8. When hung or flown the fixture must be secured by an additional hanging accessory (such as a safety cable or bond) of suitable
length.
9. Safety bonds or cables must be securely attached to the back of the fixture and be as short as possible, or rolled up as necessary,
to minimise travel distance should the fixture be dislodged.
10. Movable accessories (scroller, etc.) must also be secured with a suitable safety cable or bond at the front of the fixture.
11. The combined weight of both the fixture and the accessories must be considered when choosing the load-bearing capability of
safety cable or bond.
12. Do not open lighting fixture when the source is on.
13. WARNING: LED source become hot during use. Allow fixture to cool before servicing.
14. Do not tamper with design of fixture nor any of its safety features.
15. Tighten electrical mains cable connections regularly and replace with one of identical specification if damaged.
16. Use only with correct power supply.
VENTILATION
17. Keep well away from flammable material.
18. Not for outdoor use. Do not cover. Do not permit fixture to get wet.
19. To avoid overheating, do not obstruct air vents.
20. Ensure any cooling fans are in correct working order. If fans are not working, turn fixture off immediately and service as necessary.
CLEANING
21. Do not touch the LED source with your fingers.
22. To clean the optical parts, use a soft cloth in combination with distilled water or isopropyl alcohol recommended for coated optics.
Do not use any cleaning product that contains solvents or abrasives, as these can cause surface damage. Dry with a soft lint-free cloth.
23. Regularly remove dust with a soft lint-free cloth.
24. If the fixture has filters, they must be cleaned frequently.
POWER SUPPLY
25. Disconnect from the mains before servicing.
26. Mains connection only. Do not connect to "electronic output" such as dimmer.
27. Ensure power supply circuit breakers, always remain accessible.
PLEASE NOTE
This product has been built to conform to European standards relating to professional lighting equipment.
Any modification made to our products will void the manufacturers' warranty.
1 User’s instructions
Minimum
distance
Risk
group 2
Oz: 1,5m (5 ft )
Alice: 1m (3.3 ft )
Oz: 30m (98,4 ft )
Alice: 19m (62,3 ft )
Risk
group 1/0
Risk group 2
CAUTION: Possibly hazardous optical
radiation emitted from this product.
Do not stare at operating lamp.
Maybe harmful to the eye.
Photobiological safety according to EN62471
X1 X2

EN
3 12 18 4 2 1 10 95 6
4*
11 5* 8 7
17 15 16 14 20 19
13
21
EN - 2 -
2 Presentation
2.1 Functions
Functions
1. Yoke
2. Yoke locking
3. Side operating
4. Iris control (1169/1469 only)
4*. Iris control (1169TC/1469TC only)
5. Dimming control (1169/1469 only)
5*. Dimming control (1169TC/1469TC only)
6. Colour changer
7. Zoom adjustment
8. Focus adjustment
9. Frost glass
10. Spare filter
11. Gobo holder
12. Local display
13. Identification plate
14. Data connectors (OUT and IN)
15. Power connectors (IN and OUT)
16. Thermal breaker
17. Power switch
18. Control board
19. USB connector
20. RJ45 connector
21. Cable lock

EN
EN - 3 -
2.2 Identication label
1 2
3
4 5
8 9
76
2.3 Accessories included
Reference Description
1 CAL03 3 meter power cable ( 3G1,5 HO7RNF) with Neutrik PowerCon© True1 and
CEE 7/7 (2P+T NF/SCHUKO) connectors (standard version)
2 CAL04 1,50m power cable UL/CSA with Neutrik®powerCON TRUE1 connector
(North American version)
3 DN41145300 Quick Start manual
4 PF1011 Ø210 mm metal filter holder (x6)
5 CCU1 Full closing iris cassette - Ø72mm
6 SGUP2 Universal "A" size gobo-holder (metal, glass, frosted glass)
7 VDM100 Ø97mm frosted glass with holder
8 M210B 6-way "boomerang" colour changer (included only for Oz)
9 M210T 6-way "Push/Pull" colour changer (included only for Alice - optional for Oz)
Description
Units :
- Weight = kilogram (kg).
- Intensity = Ampere (A).
- Voltage = Volt (V).
- Frequency = Hertz (Hz).
- Temperature = degree Celsius (°C).
1. MOD. : Model
2. VERS. : Version
3. U : Nominal voltage input (V)
4. I : Nominal intensity (A)
5. P : Maximum power input (W)
6. IP : International Protection Rating
7. t°a : Maximum ambient temperature (°C)
8. t°c : Maximum external temperature of the unit (°C)
9. Net weight (kg)
10. Minimum distance between a flammable
material and the lighting unit (m)
11. Colour temperature version
12. Serial number
13. Replace broken glass
14. Class 1 product label
15. Read manual first label
16. European conformity label
17. WEEE directive label
18. CEI-TR-62778 - Do not stare at light source
19. EN62471 - Risk group
20. UKCA (UK Conformity Assessed) label
1 2
34
5 6
7 8
9
10
11
12
13 14
18 15 16 2019 17

EN
22 23 24
9° 7°11°14,7° 13°
1119
11 12
EN - 4 -
6
7 8 910
15
1413
2.4 Optional accessories
12
3 4
5
Reference Description
1 T1000 TV spigot with followspots swivel head
2 JPP Monopod stand for overhead followspot
3 GT4000 Tripod stand with safety chain - SWL: 130 Kg - max. height: 1030 mm
4 GT4000S Tripod stand without safety chain - SWL: 130 Kg - max. height: 1030 mm
5 T4000 Followspot mount for Ø50mm pipe (suspension or overhead) - SWL= 100 Kg
6 CAV700A Double slot front cassette for 215x215mm accessories
7 VD120 120x120mm frosted glass
8 FCM100R Ø97mm 1/2 CTO correction filter with holder
9 FRO/1017PD Heavy duty adjustable yoke
10 Kit G80 Ø80mm chopper kit (G80+ GR120+ adaptation kit)
11
M210B 6-way "boomerang" colour changer (only available for OZ)
M210TM 6-way "push-pull" colour changer (option available for OZ)
12 M210TVCL Light shield for M210T push/pull colour changer
13 Kit TELRAD Telrad followspot sight with raiser and universal mounting kit
14 SDUP Followspot cue sheet holder with universal mounting kit
15 FC1169/S Flight-case for Compact range (LED version) / GT stand / P.S.U. / accessories
16 GT4000RSM Tripod stand with safety chain - SWL: 130 Kg - max. height: 1030 mm (equipped with PAN sensor)
17 SMS SpotMe server + 2 sensor cables + flight case
18 T4000RSM Followspot mount with ball head rotation ans SpotMe PAN sensor SWL = 100 Kg - Weight: 8,83 Kg.
19 FRO/SMEPV Heavy duty adjustable yoke equipped with TILT SpotMe sensor (E type)
20 TCSM SpotMe calibration tool kit
21 Maestro Maestro server for SpotMe - rackable unit: 1U - half 19"
22 PCP1716A 16A blue 2P+E 6h IEC60309 power connector
23 P2FU Dual-function programmable remote controller - USB connector
24 DMXcat Bluetooth DMX/RDM Multifunction test tool - City Theatrical DMXcat®
16 17
18 19 20
21

EN
EN - 5 -
3 Set-up
3.1 Mechanics
3.1.1 Operating positions for OZ & ALICE
3.1.2 Minimum distance between a ammable material and the lighting unit
3.1.3 Instructions for use
Minimum :
40°C
104°F
5°C
40°F
IP20 - Indoor use only
Maximum :
3.1.4 Lifting
• Net weight for
OZ : 41 Kg (90.2 lbs)
ALICE 40 Kg (88 lbs)
OZ: 1,5 m / 5 ft
ALICE: 1 m / 3.3 ft

EN
EN - 6 -
3.1.5 Stand set-up
• GT4000 & GT4000S
Please refer to the relevant stand technical files for further details.
The unit must be installed only on a Robert Juliat compatible stand / head :
T1000 TV spigot with followspots swivel head
JPP Monopod stand for overhead followspot
GT4000 Tripod stand with safety chain - SWL: 130 Kg - max. height: 1030 mm
GT4000S Tripod stand without safety chain - SWL: 130 Kg - max. height: 1030 mm
T4000 Followspot mount for Ø50mm pipe (suspension or overhead) - SWL= 100 Kg
Dimension in mm.

EN
2
1
In Out
EN - 7 -
3.2 Electrical information
3.2.1 LED source
Never touch or scratch the LED surface.
Cf. 6.1.4 LED cleaning procedure if cleaning is necessary.
3.2.2 Power supply
Power cable
Power cable Connector Mains plug Cable type Cable length Wiring
1 Standard
version Neutrik®
powerCON
TRUE1
NAC3FX
CEE7/7 3G1.5
H07RNF
3 m
9.8 ft
Live: Brown
Neutral: Blue
Ground: Yellow/Green
2
North
American
version
-
14AWG
SJ TYPE
(UL/CSA)
1.5 m
4.9 ft
Live: Black
Neutral: White
Ground: Green
Power supply
Voltage Frequency Input power Connectors
100 —> 240 V 50-60 Hz
2.8 A / 640 W @ 230V
5.5 A / 649 W @ 120V
6.7 A / 655 W @ 100V
Neutrik powerCON TRUE1 TOP
Input :
ref. NAC3PX-TOP
• Class 1 product. This luminaire must be earthed.
• Must be connected directly to AC power. Do not connect to dimmer power.
• Automatic mains voltage detection.
•Maximum power available on output: 700 W
Maximum :
5 units (230V)
2 units (120V)
Daisy chain (with delivered power cable):
Power

EN
Daisy chain:
EN - 8 -
DATA connectors
PIN # DMX Description
1Shielding Foil & Braided Shield
2DMX (-) 1st conductor of 1st twisted pair
3DMX (+) 2nd conductor of 1st twisted pair
4Not used 1st conductor of 2nd twisted pair
5Not used 2nd conductor of 2nd twisted pair
Protocol Input connector Output connector
Art-Net
sACN RJ45 -
DMX OUT DMX IN
3.3 DATA
3.3.1 DMX 512-A / RDM
3.3.2 Art-Net / sACN
Protocol Input connector Output connector
USITT DMX 512-A
RDM XLR 5-pin XLR 5-pin
Power ON
Network
switch
Art-Net
sACN
Maximum :
32 units
Daisy chain:
Integrated terminal plug:
If no XLR connector is detected on DMX OUT connector, a 120  terminal plug is automatically activated. Additional terminal
plug on the last unit is not necessary.

EN
EN - 9 -
Protocol Input connector Output connector
Art-Net
sACN RJ45 DMX
Maximum :
32 units
Daisy chain:
DMX
3.3.3 Ethernet / DMX node

EN
Dimensions Cf. 4.8.1
EN - 10 -
3.4 Accessories
3.4.1 Full closing iris cassette
3.4.2 Colour changer unit - boomerang (only available for OZ)
1
1
2
2
1
TC models only

EN
3.4.4 Gobo holder
'A' size gobo
Dimensions Cf. 4.7.1
Dimensions Cf. 4.8.1
EN - 11 -
3.4.3 Colour changer unit - push-pull (ALICE)

EN
EN - 12 -
3.4.5 Double slot front cassette for 215 x 215 mm accessories (option)
3.4.6 Frosted / CTO glass (option)
Dimensions: Cf. 4.9.1

EN
EN - 13 -
3.4.7 Internal glass holder 120 x 120 mm (option)
3.4.8 Horizontal chopper (option)
Dimensions: Cf. 4.10.1
Turn, to lock into place.

EN
EN - 14 -
3.4.9 Stands
3.4.10 Heavy duty adjustable yoke (option)
• GT4000 Series : Please refer to the relevant stand technical files for further details.
Stand set-up, refer to Cf. 3.1.5.
3.4.11 Telrad followspot sight (option)
Caution: - Do not install the followspot sight on the lamp house to avoid blocking the ventilation vents.
- Secure the sight with a suitable safety cable.
Followspot sight
guide available @
www.robertjuliat.com/followspots/
Accessories.html
Caution: Slighty untighten
the screws without removing
them to set yoke position.
Remove screw to set desired
position, then tighten.
Caution:
Remove followspot from stand to set yoke position.

EN
EN - 15 -
3.4.12 Flight-case (option)

EN
0% 100%
(1169 & 1469)
(1169TC & 1469TC)
EN - 16 -
4 Operations
4.1 Light intensity
4.1.1 Range
• Dimming
4.1.2 Control
Remotely with DMX512-A protocol Locally via dimming control handle or top control Locally via Standalone mode
4.1.3 Parameters
4.1.3.1 Dimming resolution - DMX only
4.1.3.2 Dimming curve
→
selection in SETUP/DIMMER/CURVE menu: LINEAR or SQUARE
HTP mode (Highest Takes Precedence):
Light output is the highest value of DMX512 command or local control
Focus mode: when standby screen displayed,
Push Exit for 3 secs →Light output = 100% for 1 minute
2x times Exit →Light output = 0%
Resolution DMX mode
8 bits – 255 steps 1 - 3 - 5
16 bits – 65 535 steps 2 - 4 - 6
DMX512-A

EN
EN - 17 -
4.1.3.3 Master control
In order to supervise the operator from the console, master control DMX channel can be used.
This channel limits the maximum value of the dimmer shutter.
By using this function, it is possible to obtain synchronised fades with several spots or to give intensity
limits (minimum and maximum) to the operator . Master is only active when DMX is detected.
4.1.3.4 Set maximum position
→
Selection in SETUP/DIMMER/ MAX menu
4.1.3.5 Sensitivity available soon.
100%
100%
0% 0%
----> Maximum (80%)
Light Output

EN
X ms
DMX 0 = 0 ms
1 = 20 ms
255 = 4000 ms
EN - 18 -
4.3 Response time
4.3.1 Range
Mode Speed
NONE OFF
SLOW 700 ms
MEDIUM 470 ms
FAST 350 ms
CUSTOM 0 - 4000 ms
4.3.2 Control
DMX512-A
Remotely, with
DMX512-A / Art-Net / sACN protocols
Mode 3 – 4 – 5 –6
Locally, only when no DMX detected
→selection in
SETUP/DIMMER/RESPONSE TIME
4.2 Strobe
4.2.1 Range
Strobe duration
Strobe speed
DMX512-A
4.2.2 Control
Remotely with
DMX512-A / Art-Net / sACN protocols
Mode 3 – 4 – 5 –6
0 = OFF
0 = 0.1Hz
1 = 1ms 255 = 20ms
255 = 10Hz