HHB CDR850 Plus Manuale utente

IMPORTANT OPERATIONAL CONSIDERATIONS

)

The CD standard utilises a 44.1KHz samplin

stem, therefore use a 44.1KHz +/- 1000ppm external

clock source for correct operation. If, for example a clock fre

uenc

her than 44.1K is used, the

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

HHB CDR850 PLUS

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

ou for purchasin

the CDR850 PLUS. The PLUS provides the user with the abilit

to lock the

machine’s master clock to a variet

of external 44.1KHz clock sources includin

wordclock. In addition, a

balanced di

ital output is featured, allowin

the

reater cable len

ths necessar

in lar

e installations

without the inherent signal degradation.

EXTERNAL SYNCHRONISATION

In toda

’s di

ital studio environment, it is becomin

more and more important to be able to

lock/s

nchronise all di

ital e

uipment to a common samplin

fre

uenc

or house clock. The effects of

‘unlocked’ e

uipment are all too noticeable as si

nal de

radation, crackles and pops as machines ‘clock’

at different rates.

The CDR850 PLUS can be set

(

via a 4-wa

dipswitch on the rear panel

)

to ‘lock’ to a number of different

clock sources as indicated in the following table:

Playback Clock Source

X= either ON or OFF ON = Switch down

combination of switch position that does not appear in the above table will result in the 850 PLUS

reverting to INTERNAL.

System Example:

CDR850 PLUS

DIGITAL

MIXING DESK

WORD CLOCK @ 44.1KHZ

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

OFF OFF OFF OFF SPDIF OPT

SPDI COAX or BALANCED

DIGITAL OUT

IMPORTANT OPERATIONAL CONSIDERATIONS

)

The CD standard utilises a 44.1KHz samplin

stem, therefore use a 44.1KHz +/- 1000ppm external

clock source for correct operation. If, for example a clock fre

uenc

her than 44.1K is used, the

playback speed and pitch will increase accordingly.

2) Changing the clock source during play or record may cause the CDR850 PLUS to not operate correctly.

If this occurs, reset the power to the machine. Set the clock source usin

the dip-switch selector

when in ‘STOP’ mode or when the machine is powered down.

)

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

nal connected, then the

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.

)

When recordin

from or monitorin

the di

ital 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 manuall

turned on in MENU

)

, then the

‘write’ data rate itself will utilise the clock pro

rammed b

the dip-switch selector. Ensure that this is

a 44.1KHz clock. The CDR850PLUS will flash ‘CHECK’ in the displa

if an out of spec. clock is used

during recording.

)

When recordin

or monitorin

the analo

ue input, the CDR850 PLUS locks to the clock source set b

the 4-wa

dip-switch as it does in pla

back mode. NOTE -itis not possible to record analo

ue inputs

when the 850 PLUS is locked to any clock other than 44.1K +/-1000ppm asthis is outside the Orange

Book specification. The CDR850PLUS will flash ‘CHECK’ in the displa

if an out of spec. clock is used

during recording.

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 as start ‘ID’,CD ‘Q’ channel, SCMS etc.

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

HHB Communications Ltd• 73-75 Scrubs Lane • London NW10 6QU • Phone: 020 8962 5000 • Fax: 020 8962 5050 • e-mail sales@hhb.co.uk

HHB Communications USA LLC • 1410 Centinela Avenue • Los Angels • CA 90025-2501 • Phone: 310 319 1111 • Fax: 310 319 1311 • e-

mail:sales@hhbusa.com

HHB Communications Canada• 260 King Street East • Toronto • Ontario M5A 4L5• Phone: 416 867 9000 • Fax: 416 867 1080 • e-mail:

sales@hhbcanada.com

HHB On-line: http://www.hhb.co.uk

interstage

Phistersvej 31, 2900 Hellerup, Danmark

Telefon 3946 0000, fax 3946 0040

www.interstage.dk

-pro audio with a smile

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