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HHB CDR850 PLUS
PROFESSIONAL CD-R/CD-RW RECORDER
Operating Instructions
Supplement
interstage
Phistersvej 31, 2900 Hellerup, Danmark
Telefon 3946 0000, fax 3946 0040
www.interstage.dk
- pro audio with a smile
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HHB CDR850 PLUS
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This supplement is intended to provide the user with the additional information required to operate the
CDR850PLUS and is to be used in conjunction with the standard Operating Instructions of the CDR850.
Thank you for purchasing the CDR850 PLUS. The PLUS provides the user with the ability to lock the
machine’s master clock to a variet
balanced di
ital output is featured, allowing the greater cable lengths necessary in large installations
without the inherent signal degradation.
EXTERNAL SYNCHRONISATION
In today’s digital studio environment, it is becoming more and more important to be able to
lock/s
‘unlocked’ e
at different rates.
nchronise all digital equipment to a common sampling frequency or house clock. The effects of
uipment are all too noticeable as signal degradation, crackles and pops as machines ‘clock’
of external 44.1KHz clock sources including wordclock. In addition, a
The CDR850 PLUS can be set
via a 4-way dipswitch on the rear panel) to ‘lock’ to a number of different
clock sources as indicated in the following table:
Playback Clock Source
SW1 SW2 SW3 SW4 Clock Source
ONXXXINTERNAL
OFF ON OFF OFF WORD CLOCK
OFF OFF OFF ON AES/EBU
OFF OFF ON ON SPDIF COAX
X = either ON or O F F ON = Switch down
An
OFF OFF OFF OFF SPDIF OPT
combination of switch position that does not appear in the above table will result in the 850 PLUS
reverting to IN TERNAL.
System Example:
WO RD CLOCK @ 44.1KHZ
DIGITAL
MIXING DESK
SPDIF COAX or BALANCED
DIGITAL OUT
CDR850 PLUS
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IMPORTANT OPERATIONAL CONSIDERATIONS
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1
The CD standard utilises a 44.1KHz samplin
clock source for correct operation. If, for example a clock fre
playback speed and pitch will increase accordingly.
2) Changing the clock source during play or record may cause the CDR850 PLUS to not o perate correctly.
If this occurs, reset the power to the machine. Set the clock source usin
when in ‘STOP’ mode or when the machine is powered down.
3
The CDR850 PLUS is desi
ned so that the default clock source is ‘INTERNAL’ For example, if the
machine is set to lock to the word clock input and there is no word clock si
machine will revert to ‘INTERNAL’. This ensures that if a clock source input becomes intermittent, the
850 PLUS will always revert to its internal clock.
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When recordin
from or monitoring the digital input, the CDR850 PLUS outputs the clock contained
within that digital input i.e. the monitor signal bypasses the SRC as with a standard CDR850. However,
a word of caution - If the SRC is on
. 48KHz input or SRC manually turned on in MENU), then the
‘write’ data rate itself will utilise the clock pro
a 44.1KHz clock. The CDR850PLUS will flash ‘CHECK’ in the displa
during recording.
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When recordin
or monitoring the analogue input, the CDR850 PLUS locks to the clock source set b
the 4-way dip-switch as it does in playback mode. NOTE - it is not possible to record analogue inputs
when the 850 PLUS is locked to any clock other than 44.1K +/-1000ppm as this is outside the Orange
Book specification. The CDR850PLUS will flash ‘CHECK’ in t he displa
during recording.
stem, therefore use a 44.1KHz +/- 1000ppm external
uency higher than 44.1K is used, the
the dip-switch selector
nal connected, then the
rammed by the dip-switch selector. Ensure that this is
if an out of spec. clock is used
if an out of spec. clock is used
BALANCED DIGITAL OUTPUT
This output has all the electrical characteristics of the AES/EBU digital audio interface i.e. 110Ω, 5Vp-p,
balanced line and therefore can be connected to AES/EBU type inputs. The male XLR is wired pin1-
round; pin 2-hot; pin 3-cold. The format of the data follows the SP/DIF protocol i.e. transmits sub-code
data such a s start ‘ID’, CD ‘Q’ channel, SCMS e tc.
SPECIFICATIONS
Balanced Digital Output:
Impedance 110Ω
Amplitude 5Vp-p
Format SP/DIF
Word Clock Input
Impedance 75Ω
Amplitude TTL levels
Operating Frequency 44.1KHz +/-1000ppm
AES/EBU, SP/DIF COAX/OPTICAL Clock Input
Operating Frequency 44.1KHz +/-1000ppm
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interstage
Phistersvej 31, 2900 Hellerup, Danmark
Telefon 3946 0000, fax 3946 0040
www.interstage.dk
- pro audio with a smile
HHB Communi cati ons Ltd • 7 3-75 Scr ubs Lane • L ondon NW10 6QU • P hone: 02 0 89 62 50 00 • F ax: 020 8962 5050 • e -mail sa les@hh b.co .uk
HHB Commun i c a tions USA LLC
• 1410 Centin ela Aven ue • Los Angels • CA 900 25-2501 • Phone: 310 319 1111 • Fax: 310 3 19 1311 • e-
mail: sales@hhbu sa.com
HHB Communi cati ons Canad a
• 260 Kin g St ree t E ast • Tor ont o • Ont ari o M5A 4L5 • Pho ne: 416 867 9000 • F ax: 416 867 1080 • e-ma il:
sal es@hhb canad a. co m
HHB On-line: http://www.hhb.co.uk
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