4
DRAWMER
D-Cloc
D-Cloc
D-Cloc
D-Cloc
D-Clock
k
k
k
k-R
-R
-R
-R
-R
DMS-6
DUAL REDUNDANT WORD CLOCK DISTRIBUTION AMPLIFIER
Expanding on the renowned Drawmer D-Clock in providing
word clock measurement and distribution to digital audio
environments the D-Clock-R has been designed with not
only studio recording in mind but also the live and broadcast
environment, where reliability and stability are absolutely
imperative. Designed for fail-safe operation the D-Clock-R
as been developed with dual redundancy for both the
power supplies and also the word clock inputs, ensuring
that the show will go on regardless of technical difficulties.
The Drawmer D-CLock-R is an auto-sensing dual
redundancy input, sixteen output word clock distributor
with a 16 character blue LCD display providing a high
accuracy reference measurement of the incoming sample
rate. It uses a high stability TCXO (temperature
compensated xtal oscillator) along with a microcontroller
to measure the incoming sample rate to an accuracy of
2ppm and displays the information in three different
formats, actual frequency (to one decimal place), nominal
fre/- ppm error, or nominal frequency plus
percentage of pull up or pull down.
The D-Clock-R has two BNC inputs, a default
and auxiliary, which is automatically selected
depending on the strength and quality of the
signal, and capable of locking on to both
word clock (upto 768KHz) and AES-3id (upto
192kHz), it has twelve BNC clock outputs
situated on the rear panel with a further four
BNC clock outputs on the front panel for
quick patching to other digital devices.
CHAPTER 1
INTRODUCTION
Dual Redundancy power supply via 2 x
Universal voltage filtered mains power
inlets for continuous operation & reliability.
Dual Redundant input / 16 output Clock
Measurement and Distribution Amplifier
Inputs: 2 x Auto-Sensing WordClock /
AES3id BNC dual redundant inputs (@75
Ohms impedance) - should one fail input
is automatically switched to the alternative
source.
Outputs: 16 BNC clock outputs - 33 Ohms
impedance - 4 on the front panel for
convenience.
3 sample rate measurement LCD modes
accurate to 2ppm.
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DUAL REDUNDANT INPUTS
Auto-Sensing, auto-switching
inputs provides a fail-safe backup
should one input fail.
TWO INDEPENDENT POWER SUPPLIES
PROVIDE DUAL REDUNDANCY
Can fully operate on a single supply or both (with power load
balancing), providing a fail-safe backup should one fail.
