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  3. Installation & Connection Status 

 
If  you  require  no  more  than  the  12  word  clock/  AES11  outputs 
provided  by  the  nanoclocks  GL  feed  each  digital  audio  unit  with  a 
separate clock line. 
 
Use  75  ohm  coaxial  (RG59)  cables  with  standard  BNC  connectors 
for word clock or AES11 lines. 
 
It does NOT matter if the cables are 2, 5 or 10 metres long. 
 
Comment: To shift the phase of a word clock signal significantly, you 
would require a cable of some kilometers. 
 
Even  a  50m  cable  will  work  without  loss  of  quality  within  a  facility 
with proper grounding. 
 
More important than the cable  length  are equal ground potentials at 
the source and the receiver. 
 
Similarly  to  analogue  audio  signals  producing  "hum"  affected  by 
different  ground  potentials,  digital  transmission  lines  can  be 
worsened/  modulated  by  ground  loops.  Good  studio  grounding  is 
essential, not only for word clock signals. 
 
To isolate ground potentials galvanically and for interfacing coaxial to 
balanced  AES11  lines  (XLR  3-pin)  we  recommend  Neutrik  Digital 
Audio Impedance Transformers NADITBNC-F / NADITBNC-M. 

Summary of Contents for nanoclocks GL

Page 1: ...anoclocks GL nanoclocks GL is a digital audio genlock masterclock with 12 word clock AES11 DARS outputs and 2 reference inputs for SD video syncs HD tri level syncs AES11 or word clock signals www rosendahl studiotechnik com ...

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Page 3: ...age 4 2 Connection to Power Supply page 5 3 Installation Connection Status page 6 4 System Settings page 7 5 Reference page 8 6 Sample Rate page 11 7 Output Mode page 11 8 Setup Utility page 12 9 Declaration of Conformity page 13 10 Specifications page 14 ...

Page 4: ... cable 2 pcs 1U rack mount brackets mounted 1 pcs user manual that you are now reading The unit is shipped with four small plastic feet mounted underside with Philips screws If you want to rack mount your nanoclocks GL please detach the four plastic feet For desktop use please detach the rack mount brackets using a metrical hex wrench ...

Page 5: ...oclocks GL can also be powered by a 12 volt DC supply using the 4 pin XLR connector pin 1 is Ground and pin 4 is Vcc 12V The power button lights up green when the unit is powered by mains and changes to red when the power source is DC If the DC supply drops below 10 6 Volts the red power LED starts blinking Primary power source is always mains Feed mains and DC supply simultaneously to power the u...

Page 6: ...ble of some kilometers Even a 50m cable will work without loss of quality within a facility with proper grounding More important than the cable length are equal ground potentials at the source and the receiver Similarly to analogue audio signals producing hum affected by different ground potentials digital transmission lines can be worsened modulated by ground loops Good studio grounding is essent...

Page 7: ...gs Each of the three system buttons SETUP SAVE and on off must be pressed and hold for three seconds to enter setup mode save the current settings or to enter power down mode If you press these buttons shortly or unwittingly there will be no action In SAVE mode you can still use STATUS or MODE buttons to select the desired display mode For all other settings you must enter SETUP mode first Press a...

Page 8: ... syncs as well as HD tri level sync signals 1080p 1080i 720p Frame rates 23 98 24 25 29 97 30 59 94 and 60 fps are detected automatically and the INPUT buttons light up continuously when a valid sync signal is present When no valid sync signal applies the INPUT buttons start blinking Nanoclocks GL will synchronise its audio clocks as soon as a valid video input signal is detected and the sample ra...

Page 9: ... the word clock signal will be phase locked to the start of video line 1 Several nanoclocks GL units locked to the same video house sync will produce phase locked audio clocks REFERENCE AUDIO Press the AUDIO button to configure nanoclocks GL for audio genlocked operation Both reference inputs A and B accept word clock as well as AES11 reference clock signals If no valid audio clock signal is prese...

Page 10: ...e performed When a word clock signal is detected all outputs will be switched to word clock output mode when an AES11 signal is found all outputs will be switched to AES output mode In distribution amplifier mode it is not possible to configure change the output mode manually The sample rate buttons are set to inactive but still serve to display the sample rate detected on the active INPUT VARI di...

Page 11: ...nce or sample rate When stable LOCK is achieved the sample rate buttons light up continuously 7 Output Mode Enter SETUP and press the MODE button to change the output mode of outputs 1 12 By pressing buttons 1 12 you can select output modes green WORD CLOCK red AES11 DARS digital audio refrence signal off USER in firmware version 1 output muted with the nanoclocksGL setup software you can configur...

Page 12: ...etup software and select the midi I O ports In Windows XP you must select the USB audio device Vista or Windows 7 will list NanoclocksGL Press the Update firmware buttom to start the update process Do not disconnect the unit during firmware programming nanoclocksGL is a so called device class compliant USB Audio Device and does not need a driver installation Windows XP or later as well as Mac OS X...

Page 13: ...peration of adjoining appliances No unpermitted interference signals High resistance to electro smog This marking shown on the product or its literature indicates that it should not be disposed with other household wastes at the end of its working life To prevent possible harm to the environment or human health from uncontrolled waste disposal please separate this from other types of wastes and re...

Page 14: ... Word Clock 3 5 Vpp 75 ohms AES11 DARS 1 0 Vpp 75 ohms high level mode 1 5 Vpp clock jitter 10 ps RMS within the audio spectrum 20Hz 20kHz Oscillators 12 288 MHz VCXO 1 48 kHz 96 kHz and multiple 11 2896 MHz VCXO 2 44 1 kHz 88 2 kHz and multiple 16 369 MHz GPS TCXO internal timebase better 0 2 ppm 1 8 GHz PLL for 0 1 pull down rate generation USB USB type B device class compliant MIDI USB audio pl...

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