Grimm Audio CC1v2 Manual

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Please read this manual before operating the

Please read this manual before operating the unit.

unit.

Jitter is the Achilles heel of digital audio. A stable clock

is of vital importance for high quality sound.

CC1: without doubt The Final Word.

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Summary of Contents for Grimm Audio CC1v2

Page 1 Jitter is the Achilles heel of digital audio. A stable clock is of vital importance for high quality sound. CC1: without doubt The Final Word. Please read this manual before operating the Please read this manual before operating the unit. unit.
Page 2: Table Of Contents
Table of Contents 1. Introduction 2. Important Safety Instructions 3. Installing 4. Operation 5. Setting up the studio 6. Jitter and PLL’s explained 7. Specifications 8. Grimm Audio Limited Warranty Manual CC1 © Grimm Audio...
Page 3: Introduction
1. Introduction system to video clock, please insert a Grimm Audio VCC, ‘video to word clock converter’ before the clock input. Thank you for choosing the Grimm Audio CC1 Central Clock distributor for your production environment. This • Clock stability improvement, and hence improved product features a rich set of distributor functions, sound, of digital live desks and digital snakes.
Page 4: Important Safety Instructions
Grimm Audio gaat er van uit dat u deze Engelstalige tekst Read these instructions. volledig begrijpt. Als u hier moeite mee heeft dient u contact op te nemen met Grimm Audio. Op verzoek sturen wij u een Keep these instructions. vertaling toe.
Page 5 13. Clean only with a dry, soft, non-fluffy cloth. Do not combination to avoid injury from tip-over. spray any liquid cleaner onto the cabinet, as this may lead to dangerous shocks. Do not spray any Manual CC1 © Grimm Audio...
Page 6: Installing
In general it is a good idea to keep some distance between monitors (LCD and CRT) and audio and word clock cables because of risk of induced low level noise due to stray magnetic fields. Manual CC1 © Grimm Audio...
Page 7 Grimm Audio products have a real wood face plate that provides a beautiful and vivid appearance. To maintain the outstanding looks, one is advised to take some precautions: - Do not place the CC1 in humid nor very dry environments. The wood might crack.
Page 8: Operation
2 (75 Ohm line voltage 13, 14 available purpose) AES-out Impe- or Lo-Z) or Lo-Z) value (normal behavior dance or 180°) selected, (thru or group 1 otherwise mute) (75 Ohm group 2) or Lo-Z) Manual CC1 © Grimm Audio...
Page 9 CC1, but the ‘aes’ dip switch is set to AES3 output will obviously run at the same rate as the ‘mute’. The AES3 output will still be black and synchronous. The presence of the aes signal has no Manual CC1 © Grimm Audio...
Page 10 2. run at the same multiple as the AES3 input. In mute mode it will be synchronous to group 2, audio is black and marked “no reference”. Upon loss of lock the output Manual CC1 © Grimm Audio...
Page 11 ‘unlock’. When set to “thru”, the clock frequency will be with the input in an even slower mode. The smallest held constant within 1 ppm of the last valid measured achievable phase error depends mostly on the stability Manual CC1 © Grimm Audio...
Page 12 Double termination like this produces a 6dB 3. Blinking: An AES3 signal is present but it is out of sync loss, resulting in a 2.5V signal. All Grimm Audio products with the CC1. are designed to work in this manner.
Page 13 AES and unlock switches The ‘aes’ and ‘unlock’ switches can be set to ‘’mute’ or ‘thru’. The behavior of the CC1 in these modes is described in the sub-chapters ‘Master mode’ and ‘Slave mode’ above. Manual CC1 © Grimm Audio...
Page 14: Setting Up The Studio
The latter will most likely fail anyway because purpose, it doubles as a jitter removal function for any of the lack of standardisation of termination impedance AES3 signal (provided it is synchronous with the CC1). Manual CC1 © Grimm Audio...
Page 15 In consumer use, most equipment features RCA S/PDIF circulating currents. Not all equipment is designed in connectors in stead of XLR AES3 connectors. To use the this manner unfortunately. CC1 in such a hifi setup, special S/PDIF to AES3 and AES3 Manual CC1 © Grimm Audio...
Page 16 CC1 page on our Lavry Engineering, MOTU, Mytec, SSL or RME. website. An important thing to know for a CC1 user is that some products have two modes, usually called Manual CC1 © Grimm Audio...
Page 17 This is unfortunate because low jitter is not exactly a design • Make cables no longer than necessary. spec for a video sync generator. Manual CC1 © Grimm Audio...
Page 18: Jitter And Pll's Explained
When jitter is present, side bands occur. Some spectral energy is located away from the clock. The faster the timing chatters, the further away from the main frequency you’ll find energy. Figure 1. A stable and a jittery clock signal Manual CC1 © Grimm Audio...
Page 19 The difference between the red and blue curve shows the error. Or take the converse in the right column: the DAC is fine Figure 2. Spectra of clock signals Manual CC1 © Grimm Audio...
Page 20 Now, the PLL will track the external sync closely, but not too closely. Unwanted fluctuations (jitter) of the external sync signal are to be ignored but if the local oscillator drifts off it should be slowly pulled back into step. So Manual CC1 © Grimm Audio...
Page 21 A quick way of seeing if a PLL is slow or fast is to see attenuation of the local oscillator’s jitter. Below the cut- how long it takes to achieve lock. Usually, slow PLL’s also Manual CC1 © Grimm Audio...
Page 22 200 Hz when internal oscillator. An unstable external sync actually slaved to a CC1. makes it sound worse. Manual CC1 © Grimm Audio...
Page 23: Specifications
(‘low’) on selected channels. • Word clock output voltage, terminated 2.7 Vpp, unterminated 5.5 Vpp. DC coupled. • Latency word clock in - word clock out: adjusted to less than 50 ns (but depends on input clock jitter). Manual CC1 © Grimm Audio...
Page 24 Life expectancy power supply electrolytics > 45.000 hours. Power supply voltage range +/- 20% • Fuses: ▪ 120V (USA): fuse 500 mA ▪ 100V (Japan): fuse 500 mA ▪ 230V (EU): fuse 250 mA • Weight: 4 kg Manual CC1 © Grimm Audio...
Page 25: Grimm Audio Limited Warranty
All This warranty is linked to the serial number of the authorized returns must be sent to Grimm Audio or an device and can be transferred to second hand owners if authorized Grimm Audio repair facility postage prepaid, they can show their purchase bill.
Page 26 In no event will Grimm Audio be liable for incidental, © 2021, Grimm Audio BV. All rights reserved consequential, indirect or other damages resulting from the breach of any express or implied warranty, Grimm Audio CC1 manual v2.2, 15/06/2021 including, among other things, damage to property, damage based on inconvenience or on loss of use of the Reproduction in whole or in part is prohibited.
Page 28 Grimm Audio BV The Netherlands +31 40 213 1562 info@grimmaudio.com www.grimmaudio.com...

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