Drawmer DMS-1 M-Clock Master Clock Generator and Multiple Sample Rate Converter - Manual (Page 4)

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DRAWMER DMS-1
M-Cloc M-Cloc M-Cloc M-Cloc M-Clock k k k k
MASTER CLOCK GENERATOR AND
MULTIPLE SAMPLE RATE CONVERTER
Front Panel Input:
either 1x S/PDIF or 1x optical TOSLINK
1 2 3 4 5 6
13 11 10 12 9 8 7 14
1 4x Status Locked Leds:
indicates a locked signal for each of the
four inputs
2 4x Toslink Outputs:
conveniently located on the front panel
for easy access.
3
Output Sample Rate:
the two switches set a sample rate of
44.1k, 48k, 88.2k and 96k.
4 Output 5/6 sample rate x2:
doubles the sample rate as set by 4 -
upto 192k - for clock outputs 5 and 6.
5 Superclock (256x) Output:
provides Superclock to clock outputs 7
and 8.
6
2x AES/EBU Inputs: 7 1x S/PDIF Input: 8 4x AES/EBU Outputs: 9
4x SPDIF Outputs: 10 2x AES 11 XLR Outputs:
outputs to the AES 11 standard
(Also called DARS, Blank Frame).
11 2x AES 11 SPDIF Outputs:
outputs to the AES 11 standard.
(Also called DARS, Blank Frame).
12
8x BNC Clock Outputs:
the sample rate of 44.1k, 48k, 88.2k and
96k is set by switches 4 .
13 5/6 x2 Clock Outputs:
when switch 5 is set to double the
output is twice the sample rate as set by
switches 4 , upto 192k.
14 7/8 Superclock (256x) Output:
when switch 6 is in, connectors 7/8
provide Superclock (256x) output.
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INTRODUCTION
In today's studio where increasing numbers of digital devices need
to be interconnected, maintaining digital signal integrity can be a
serious problem. The traditional professional solution has been to
use an expensive master clock that drives all the digital equipment
in the studio, but in most project studios there are often pieces of
equipment that don't have wordclock inputs such as consumer CD
players, MD recorders, DAT machines and budget computer
soundcards.
The Drawmer M-Clock DMS-1 has been designed to be the heart of syncronisation in the digital audio studio, offering an
extremely highly specified, multiple output master clock generator that also incorporates four further channels of sam-
ple-rate-conversion (a total output of twenty four Grade 1 synchronization signals in the form of AES/EBU, SPDIF,
optical Toslink and AES 11), all locked to the same master clock. The M-Clock generates seven Ultra Low Jitter sample
rates - 44.1k, 48k, 88.2k, 96k, 176.4k and 192k as well as 256x Superclock, all stable to < 1ppm. If any equipment in
the studio suffers jitter at its output the sample rate converters may be used to de-jitter and re-clock the signals before
further transmission.
The advantages of combining wordclock with multiple channels of 'clock-locked' sample rate conversion are significant
and often under-appreciated. With M-Clock, all your 'pro' and consumer digital equipment can run in the same system,
locked to the same clock, with no worries about finding a suitable sync source. You'll no longer have to switch equipment
between internal and external sync as you repatch - and the M-Clock helps to maintain optimum stereo imaging, lower
noise and lower distortion. If you have multiple pieces of digital equipment in your studio, whether professional or a
mixture of professional and consumer, the Drawmer M-Clock is the most effective upgrade you can make.
CHAPTER 1