Rosendahl Nanoclocks manual
Contents
1. and 48 kHz outputs 1 4 can be set individually to output Fs x1 word clock or Fs x256 super clock signals The other outputs 5 12 can be configured as Fs x1 base sample rate or Fs xn word clock the multiplier Fs xn can be set to x2 88 2 96 kHz or x4 176 4 192 kHz Press the MENU key to enter the setup mode and select the GENERATOR operation mode with the SELECT key If you press the MENU key once more the currently selected base sample rate LED will start to blink and the value 44 100 48 000 can be changed with the SELECT key Press the MENU key once more to set the multiplier Fs xn to value x2 or x4 with the SELECT key Fs nx is the multiplier of the base sample rate for the word clock outputs WO5 WO 12 if activated for the corresponding output LEDs 1 12 Twelve subsequent depressions of the MENU key pass you through the twelve output matrix LEDs 1 12 with which the currently selected LED is blinking Press the SELECT key to set the corresponding output multiplier on or off Press and hold the MENU key for one second until the LEDs stop blinking to store your settings and exit the setup mode Failsafe Mode Operation mode FAILSAFE monitors the two input signals and performs an automatic switch over of all 12 outputs if the primary input A word clock signal fails Connect the primary word clock reference to input A and the auxiliary word clock signal to input B Press the MENU key to enter the setup mode and selec2. press the MENU key to enter the setup mode The selected operation mode LED will start to blink and you can change the operation mode by pressing the SELECT key until the DISTRIBUTOR LED is blinking Press the MENU key once more and the output matrix LED 1 will start to blink Now you can select the source for word clock output 1 WO1 LED off input A LED on input B Subsequent depressions of the MENU key step through the output matrix LEDs 2 to 12 to select individually the source for each corresponding word clock output Press and hold the MENU key for one second until the LEDs stop blinking to store your settings and exit the setup mode The status of word clock input A is indicated with four LEDs 48 000 44 100 0 1 and x2 Table 1 shows all possible combinations with the corresponding word clock frequencies table 1 input A status LEDs X LED on 0 LED off input signal LED LED LED LED standard 48 000 44 100 0 1 no signal 31 000 Hz 44 034 Hz non standard 44 035 Hz 44 078 Hz 44 1 pull down 44 079 Hz 44 122 Hz 44 1 44 123 Hz 47 928 Hz non standard 47 929 Hz 47 976 Hz 48 pull down 47 977 Hz 48 024 Hz 48 kHz 48 025 Hz 68 100 Hz non standard 68 100 Hz 88 068 Hz non standard O X C O K O O O XX CO O K O O 88 069 Hz 88 156 Hz 88 2 pull down 88 157 Hz 88 244 Hz 88 2 88 245 Hz 95 856 Hz non standard 95 857 Hz 95 952 Hz 96 p
3. Nanoclocks is a word clock distributor with integrated audio master clock generator dual inputs with frequency status indicators and programmable output matrix a flexible synchronising tool for all extensive digital audio installations ROSENDAHL T g n o C O C S Table of Contents Front Panel page 2 Back Panel age 4 DIGITAL AUDIO CLOCK SERVER ala laon eae Distributor Mode page 6 Generator Mode page 8 Failsafe Mode page 9 Specifications page 10 U ser M anu al Declaration of Conformity page 11 Rosendahl Studiotechnik GmbH 80804 Munich Germany www rosendahl studiotechnik de email rosendahl studiotechnik t online de interstage Phistersvej 31 2900 Hellerup Danmark Telefon 3946 0000 fax 3946 0040 www interstage dk pro audio with a smile als Front Panel 1 LEO ofti 1 12 lnpet A LED om 032 inpet E teepaeevev eu Lee Pr wt cotput 5 12 LEO oft Port LOD on 14 fa e256 S 12 Pas 1 Power Switch Turns the power to the Nanoclocks on and off In FAILSAFE operation mode the power switch is disabled to prevent switching off by mistake See also Chapter Failsafe Mode on page 9 2 Operation Mode LEDs The Nanoclocks has three different operation modes DISTRIBUTOR FAILSAFE GENERATOR The three LEDs indicate the selected operation mode The front panel silkscreen has two grey lines The top line input A status input B status describes the functions of the LED fields for the two ope
4. and holding the MENU key for approximately one second until the LEDs stop blinking stores the set up in non volatile memory For a temporary set up stay in setup mode Turning off the unit when in setup mode and then re powering the unit will re set the previously stored parameters Back Panel 1 2 3 4 A ee Goo aooi 1 Transformer Isolated Inputs A and B Isolated BNC connectors Input A and input B are transformer isolated word clock inputs internally terminated with 75 ohms Input A works with word clock signals from 32 100 kHz Fs x1 Fs x2 and input B with signals from 32 200 kHz Fs x1 Fs x4 or super clock signals from 10 13 MHz Fs x256 2 Word Clock Super Clock Outputs WO1 WO4 BNC connectors 75 ohms The first four outputs WO1 WO4 can be either DC coupled word clock or AC coupled super clock outputs 3 Word Clock Outputs WO5 W012 BNC connectors 75 ohms DC coupled word clock outputs 4 Mains Input EN 60320 two pole Use only the supplied AC power cord for the mains connection Installation The Nanoclocks is shipped in two versions 1 230 VAC 50 Hz 2 115 VAC 60 Hz Check voltage on the back panel before connecting the unit to mains The optimum solution is to mount the Nanoclocks in the same 19 rack as the most important AD DA digital audio converters in your studio These units should receive the lowest jitter sample clocks The common grounding of the 19
5. inverse short cycle on long cycle off This monostable alarm function all LEDs blinking is a good way to monitor word clock signals over long time and make sure the signal did not drop for even one audio sample Specifications word clock input A word clock input B word clock outputs internal clock generator transformer isolated earthfree BNC 75 ohms internal terminated 32 100 kHz Fs x1 Fs x2 minimum level 0 7 Vpp transformer isolated earthfree BNC 75 ohms internal terminated 32 200 kHz Fs x1 Fs x4 or 10 13 Mhz Fs x256 minimum level 0 7 Vpp 12 x BNC 3 5 Vpp 75 ohms outputs 1 4 FS x1 FS x4 or Fs x256 super clock outputs 5 12 FS x1 FS x4 48 kHz 96 kHz 192 kHz 12 288 MHz XTAL 1 44 1 kHz 88 2 kHz 176 4 kHz 11 2896 MHz XTAL 2 CE Declaration of Conformity Rosendahl Studiotechnik GmbH Isoldenstra e 26 D 80804 M nchen herewith confirm that the product Type Digital Audio Clock Server Model Nanoclocks meets the requirements of the council of the European communities relating to electromagnetic compatibility Council Directive 89 336 EEC Technical Data CENELEC EN 50 081 1 1 1992 CENELEC EN 50 082 1 1 1992 The CE symbol is awarded to high quality appliances which comply with the European Directive 89 336 EEC or the EMVG law relating to electromagnetic compatibility of appliances and which offer the following significant benefits Simultaneous a
6. nd interference free operation of adjoining appliances No unpermitted interference signals crystal accuracy 5 ppm ambient temperature 15 30 Celsius clock jitter lt 10 ps RMS within the audio spectrum 20Hz 20kHz High resistance to electro smog power supply internal linear power supply 10 watts 115 VAC or 230 VAC version available dimensions 1U 19 41 5cm W x 4 2cm H x 12 5cm D weight 2 0 kg interstage Phistersvej 31 2900 Hellerup Danmark Telefon 3946 0000 fax 3946 0040 www interstage dk pro audio with a smile 10 TE
7. rack will also help improve jitter performance Comparable to hum in analog audio lines modulated ground potentials can create jitter in digital audio links For that reason the Nanoclocks has a two pole mains a linear power supply and transformer isolated word clock inputs Note If you require no more than the twelve word clock outputs provided by the Nanoclocks feed each digital audio unit with a separate clock line All word clock and super clock cables must be 75 ohm coaxial RG59 Do not use 50 ohm coaxial computer network cables RG58 Most word clock inputs are internally terminated with 75 ohms You can not connect two terminated inputs to one word clock output using a BNC T Only if the inputs are switchable or have no termination you can use BNC Ts to connect multiple word clock inputs In this case use very short cables to link the BNC Ts Ensure that only the last input is 75 ohm terminated Passive BNC T links should not be used to link more than 3 inputs Some word clock inputs are not internally terminated Alesis BRC for example These inputs must be externally terminated using a BNC T amp 75 ohm terminator Check all word clock and super clock signal lines for correct single ended 75 ohms termination Distributor Mode In operation mode DISTRIBUTOR the two input signals A and B can be routed individually to each of the 12 word clock outputs If your unit is currently in the GENERATOR or FAILSAFE operation mode please
8. ration modes DISTRIBUTOR and FAILSAFE In the GENERATOR mode the bottom grey line sample rate Fs xn is valid 3 Input A Status Sample Rate LEDs Depending on the operation mode of the unit these four LEDs indicate either the frequency status of input A DISTRIBUTOR FAILSAFE mode or the selected base sample rate GENERATOR mode 4 Input B Status Fs xn Factor LEDs Depending on the operation mode of the unit these six LEDs indicate either the frequency status of input B DISTRIBUTOR FAILSAFE mode or the selected multiplier Fs xn for outputs 5 12 GENERATOR mode 5 Output Source Output Multiplier LEDs In operation modes DISTRIBUTOR and FAILSAFE these twelve LEDs indi cate the selected source input A or input B for each corresponding word clock output 1 12 In operation mode GENERATOR the twelve LEDs indicate the selected output multiplier Fs x256 for outputs 1 4 and Fs xn for outputs 5 12 for the corresponding outputs 6 Setup Keys Pressing the MENU key enters setup mode the blinking LED indicates the current selected operation mode Subsequent depressions of the MENU key select the parameter to change In operation mode DISTRIBUTOR Operation mode Output source 1 12 In operation mode GENERATOR Operation mode Base sample rate Multiplier Fs xn Output multipliers 1 12 Depressing the SELECT key cycles through the options for each selected parameter Once the desired parameters are set pressing
9. t the FAILSAFE operation mode with the SELECT key Press and hold the MENU key for one second until the LEDs stop blinking to store this setting and exit the setup mode In operation mode FAILSAFE the POWER switch is disabled to prevent switching off by mistake by technically inquisitive visitors for example For the same reason the MENU key must be pressed and held for one second to enter the setup mode The two LED rows input A status and input B status indicate the presence of both input signals A and B and the two sample rate frequencies should be identical of course in this application All twelve output matrix LEDs are automatically set off and the word clock outputs WO1 WO12 distribute the primary input signal A If the primary input signal A fails for the period of one audio frame the unit performs an automatic switch over of all twelve outputs to signal B All twelve output matrix LEDs start blinking long cycle on short cycle off to indicate the performed switch over One of the internal LED signals can be used to drive also external alarm functions The unit does not automatically switch back to the primary input A even when signal A becomes present again The user must press the SELECT key to reset the unit to switch back to the primary input A Only if signal B also fails for one audio frame the unit switches automatically back to signal A This operation is then indicated with all twelve LEDs blinking
10. ull down 95 953 Hz 96 048 Hz 96 kHz gt lt lt gt lt XO O XK XK OX HK CO oxo lt O O XXXIX OC CO X lt lt lt O lt gt lt gt lt gt lt gt lt gt lt gt lt O O O O O o olo 96 049 Hz 136 kHz non standard The status of word clock input B is indicated with six LEDs 48 000 44 100 0 1 x2 x4 and x256 Table 2 shows all posible combinations with the corresponding word clock frequencies in addition to table 1 table 2 input B status LEDs LED LED LED LED LED LED standard 48 00 44 10 0 1 x2 x4 X256 0 0 0 0 See table 1 X X 0 0 X 0 non standard Fs gt 136 kHz 0 X X 0 X 0 176 4 kHz pull down 0 X 0 0 X 0 176 4 kHz X 0 X 0 X 0 192 kHz pull down X 0 0 0 X 0 192 kHz X X 0 0 0 X non standard F input gt 8 MHz 0 X X 0 0 X 11 2896 MHz pull down 0 X 0 0 0 X 11 2896 MHz X 0 X 0 0 X 12 288 MHz pull down X 0 0 0 0 X 12 288 MHz Note Only word clock outputs 1 4 can distribute Fs x256 super clock signals Outputs 5 12 are automatically switched back to distribute signal A when a super clock signal is detected on input B Generator Mode In GENERATOR mode the unit works as an ultra low jitter audio master clock generator with 12 clock outputs Please note that in this operation mode the bottom grey line of the front panel silkscreen is valid Supported base sample rates are 44 1
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