Instruction Manual nanoclocks 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.
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Contents 1. Unpacking and Mounting into a 19" Rack 2. Connection to Power Supply 3. Installation & Connection Status 4. System Settings 5. Reference 6. Sample Rate 7. Output Mode 8. Setup Utility 9. Declaration of Conformity 10.
1. Unpacking and Mounting into a 19" Rack nanoclocks GL comes with the following accessories: 1 pcs IEC 60320/C14 power cable 1 pcs USB 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.
2. Connection to Power Supply Attention! Before connecting to mains please check the voltage selector on the left side panel. Disconnect from mains before switching. Make sure the 115 / 230V setting matches to your local mains voltage. Use 230 VAC setting in the UK, EU. Use 115 VAC setting in the US, Japan. nanoclocks 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.
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.
Correct termination is quite important to avoid cable reflections, especially for the higher frequency AES11 signals. The nanoclocks GL is monitoring the connection status on each output and displays the present state of termination. (1) Press the STATUS key. (2) buttons 1..12 for outputs 1..12 will display: off: output is open or not terminated, > 85Ω green: output is in use and terminated with 75Ω red: output is double/ low terminated, < 50Ω 4.
5. Reference REFERENCE = INTERNAL: Press the INT. button to set the nanoclocks to its internal, temperature-compensated timebase accurate to 0.2 ppm (parts per million). INPUT buttons are set inactive and the sample rate buttons enter a blinking mode during the calibration process. After a few seconds the sample rate buttons will light up continuously to indicate LOCKED operation. REFERENCE = VIDEO: Press the VIDEO button to configure nanoclocks GL for videogenlocked operation.
Switching from INPUT A to INPUT B does not produce deviations on the synchronised audio clocks, stable operation will be obtained. All lock and relock procedures are operated very smoothly to guarantee continuous audio clock output signals during all stages: lock, hold, relock. If the video frame rate is a multiple of the sample rate, it is possible to lock the audio phase to video syncs. Then the rising edge of the word clock signal will be phase locked to the start of video line 1.
The lock range of the nanoclocks audio crystal oscillators is +/- 50 ppm, which allows synchronisation to even strongly distuned audio clock references. Sample rate buttons light up continuously when the unit is LOCKED to the selected audio reference input signal. REFERENCE = DISTRIBUTION AMPLIFIER Press the DIST. AMP button to switch to distribution amplifier mode.
6. Sample Rate Enter SETUP and select the new sample rate by pressing the respective button. Button -0.1% will apply a so-called pull down sample rate (x1000/1001) as used for video and film post-productions for NTSC frame rate compensation. Do not use pull down rates for standard audio applications. Sample rate buttons are blinking when the unit is relocking/ synchronising to a new reference or sample rate. When stable LOCK is achieved the sample rate buttons light up continuously. 7.
8. Setup Utility The firmware version installed on your nanoclocks GL is displayed every time the unit is powering up. After a LED test (all LEDs light up from left to right) the connection and output status field LEDs will briefly show the current version (one digit only, current version is 1). Please visit www.rosendahl-studiotechnik.com for upcoming firmware versions and utility/ monitor programs, coming at the end of 2013. To boot in firmware update mode, please press and hold 88.
9. Declaration of Conformity Rosendahl Studiotechnik GmbH Andechser Str. 5 D-86919 Utting a.A.
10. Specifications Reference Inputs: A, B 2 x BNC, internally terminated. Video: 300mV sync, +/- 300mV tri-level. auto detection of the following video standards: 576i47.95, 576i48, 576i50(PAL), 480i59.94(NTSC), 480i60, 720p50, 720p59,94, 720p60, 1080i47.95, 1080i48, 1080i50, 1080i59.94, 1080i60, 1080p23.98, 1080p24, 1080p25, 1080p29.97, 1080p30, 1080p50, 1080p59.94, 1080p60. Audio: AES11 or word clock signals, minimum level > 250mV. auto detection of the following sample rate standards: 44.056, 44.
