Sony PCM-1630 User manual

SONY.
DIGITAL AUDIO PROCESSOR
PCM-1630
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OPERATION AND MAINTENANCE MANUAL
1st Edition (Revised 7)
Serial No. 10001 and Higher

Before operating the unit, please read this manual thor-
oughly and retain it for future reference.
OWNER'S RECORD
The model and serial numbers are located on the rear
of the unit. Record the serial number in the space provid-
ed below.
Refer
to them whenever you call upon an authorized Sony
representative regarding this product.
Model No. PCM-1630 Serial No.
Warning- This equipment generates, uses, and can
radiate radio frequency energy and if not installed and
used in accordance with the instructions manual, may
cause interference to radio communications. It has
been tested and found to comply with the limits for a
Class A computing device pursuant to Subpart J of Part
15 of FCC Rules, which are designed to provide
reasonable protection against such interference when
operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause in-
terference in which case the user at his own expense
will be required to take whatever measures may be re-
quired to correct the interference.
The shielded interface cable recommended in this manual
must be used with this equipment in order to comply with
the limits for a computing device pursuant to Subpart J of
Part 15 of FCC Rules.
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The material contained in this manual consists of infor-
mation that is the property of Sony Corporation and is
intended solely for use by the purchasers of the equip-
ment described in this manual.
Sony Corporation expressly prohibits the duplication of
any portion of this manual or the use thereof for any pur-
pose other than the operation or maintenance of the
equipment described in this manual without the express
written permission of Sony Corporation.
Le materiel contenu dans ce manuel consi ste en in for·
mations qui sont Ia propriete de Sony Corporation et
sont destinees exclusivement a !'usage des acquereurs
de l'equipement decrit dans ce manuel.
Sony Corporation interdit formellement Ia copie de quel-
que partie que ce soil de ce manuel ou son emploi pour
tout autre but que des operations ou entretiens de
l'equipement a moins d'une permission ecrite de Sony
Corporation.
Das in dieser Anleitung enthaltene Material besteht aus
lnformationen, die Eigentum der Sony Corporation sind,
und ausschlieBiich zum Gebrauch durch den Kaufer der
in dieser Anleitung beschriebenen AusrOstung
bestimmt sind.
Die Sony Corporation untersagt ausdrOckl ich die Ver-
vielfaltigung jeglicher Teile dieser Anleitung oder den
Gebrauch derselben fOr irgendeinen anderen Zweck als
die Bedienung oder Wartung der in dieser Anleitung
beschriebenen AusrOstung ohne ausdrOckliche schrift-
liche Erlaubnis der Sony Corporation.
PCM-1630 (U/C. AEP)

TABLE OF CONTENTS
TABLE DES MATIERES
1. OPERATION 1. FONCTIONNEMENT
1-1. Features ....................... 1-l(E)
1-1. Caracteristiques . . . . . . . . . . . . . . . . . . 1-1 (F)
1-2. Specifications ................... l-2(E) 1-2. Specifications
................... l-2(F)
1-3. Recommended Equipment ........... l-4(E) 1-3. Equipments recommandes
........... l-4(F)
1-4. Precautions ..................... l-5(E) 1-4. Precautions
..................... l-5(F)
1-4-1. On Power Supply .............. l-5(E) 1-4-1. Alimentation
................. l-5(F)
1-4-2. On Ventilation ................ l-5(E) 1-4-2. Ventilation
.................. l-5(F)
1-4-3. On Operating Temperature Range ... l-6(E) 1-4-3. Plage des temperatures de
fonctionne-
1-4-4. On Warm-up Time of the Unit ...... l-6(E) ment
.................... l-6(F)
1-4-5. On Analog Inputs and Outputs ..... l-6(E) 1-4-4. Duree de prechauffe de l'appareil
.... l-6(F)
1-4-6. On Composite Digital (Video) lnpu ts 1-4-5. Entrees
et sorties analogiques ...... l-6(F)
and Outputs ............... l-6(E) 1-4-6. Entrees
et sorties numeriques
1-4-7.
On Short-circuit Protection . . . . . . . l-6(E) composite (video)
............ l-6(F)
1-5. Location and Function of Parts and 1-4-7.
Protection contre court-circuit . . . . . l-6(F)
Controls . . . . . . . . . . . . . . . . . . . . . l-7(E) 1-5. Emplacement et fonction des organes
et
1-5-1. Front Panel .................. l-7(E)
descomposants ................ l-7(F)
1-5-2. Connector Panel ............... 1-lO(E) 1-5-1. Panneau avant
................ l-7(F)
1-5-3. Printed Circuit Boards ........... l-12(E) 1-5-2. Panneau des connecteurs
......... 1-lO(F)
1-6. Recording Level Adjustment . . . . . . . . . . l-18(E) 1-5-3. Plaquettes de circuit imprime
...... l-13(F)
1-6-1. Reference Signal Level and 1-6. Reglage du niveau d'enregistrement
..... l-18(F)
Headroom ................. l-18(E) 1-6-1. Niveau du signal de reference et
1-6-2. Level Meter .................. l-18(E) latitude ................... l-18(F)
1-6-3. Level Adjustment .............. l-18(E) 1-6-2. Indicateurdeniveau ............ l-19(F)
1-7. Connections and Operation . . . . . . . . . . l-19(E) 1-6-3. Reglageduniveau .............. l-19(F)
1-7-1. Recording and Playback .......... l-19(E) 1-7. Connexions et exploitation ............ l-20(F)
1-7-2. Digital Dubbing ............... l-20(E) 1-7-1. Enregistrementetlecture ......... l-20(F)
1-7-3. Editing with a DAE-1100 Digital 1-7-2. Copiage numerique ............. l-2l(F)
Audio Editor ............... l-2l(E) 1-7-3. Montage avec un Editeur audio
1-7-4. Editing with a DAE-llOOA Digital numerique DAE-1100
......... l-23(F)
Audio Editor ............... l-23(E)
1-7-4. Montage avec un Editeur audio
1-7-5. Synchronization with Two numerique DAE-llOOA
........ l-25(F)
PCM-1630s ................ l-25(E)
1-7-5. Synchronisation entre deux
1-7-6. Recording and Playback of the SMPTE PCM-1630
......... .
l-27(F)
Time Code ................ l-27(E)
1-7-6. Enregistrement et lecture du code de
1-8. Block Diagram ................... l-28(E)
temps SMPTE .............. l-29(F)
1-9. Signal Flow ..................... l-29(E) 1-8. Schema de principe
................ l-30(F)
1-9-1. Data Flow ................... l-29(E) 1-9. Parcours du signal
................. l-3l(F)
1-9-2. Emphasis Data Flow ............ l-29(E)
1-9-1. Organigramme des donnees . . . . . . . . 1-31 (F)
1-10. Signal Format ................... l-30(E)
1-9-2. Organigramme des donnees
1-10-1. Composite Digital (Video)
Input/
d'accentuation .............. l-3l(F)
Output Signals .............. l-30(E)
1-10. Structure du signal ................ l-32(F)
1-10-2. Digital Input/Output and Control 1-10-1. Signaux d'entreejsortie (video)
Signals ................... l-3l(E)
numerique composite ......... l-32(F)
1-11. Synchronization .................. l-33(E) 1-10-2. Signaux d'entreejsortie et de
controle
numerique ................. l-33(F)
1-11. Synchronisation .................. l-35(F)
-1-

2. SERVICE INFORMATION
2-1. Repacking . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2. Rack Mounting .................... 2-2
2-3. Case Removal . . . . . . . . . . . . . . . . . . . . . 2-3
2-4. Heat Sink Assy Removal . . . . . . . . . . . . . . 2-4
2-5. Caution for PS-81 Board
and
Fuse Replacement . . . . . . . . . . . . . . . . 2-5
3. ELECTRICAL ADJUSTMENTS
3-1. Equipments Required ................ 3-1
3-2. +5 V·±22 V Voltage Adjustment
(PS-81 Board) . . . . . . . . . . . . . . . . . . . 3-1
3-3. AD Conversion Level Adjustment
(AD-23 Board) . . . . . . . . . . . . . . . . . . . 3-2
3-4.
DA Conversion and Analog Output Adjust-
ments (DA-15 Board) . . . . . . . . . . . . . . 3-4
3-4-1. Oscillator
Frequency Adjustment . . . . . 3-4
3-4-2. Level
Adjustment ................ 3-5
3-4-3.
Output Offset Adjustment .......... 3-6
3-5. Composite Digital
Output and
Clock
Adjustments (SIF-1 Board) ...... 3-7
3-5-1. Composite Digital
Output Level
Adjustment .................. 3-8
3-5-2. Composite Sync Phase
Adjustment .... 3-8
3-5-3. Master Clock
Duty Adjustment . . . . . . . 3-8
3-5-4. External
Synchronization Adjustment .. 3-8
3-6. Sync and Data
Extraction Level Adjustment
(DEC-15 Board) .................. 3-9
-2-
A.
B.
c.
D.
SEMICONDUCTOR PIN ASSIGNMENTS
Diode ............................ A-1
Transistor ......................... A-1
IC .............................. A-2
BLOCK DIAGRAMS AND
CIRCUIT DESCRIPTION
AD-23 Board ...................... B-3
DA-15 Board ...................... B-7
ENC-2 Board ...................... B-12
SIF-1 Board
....................... B-16
DEC-15 Board
..................... B-18
MT-16 Board
...................... B-21
SCHEMATIC AND CIRCUIT BOARD
DIAGRAMS
AD-23 Board ...................... C-3
DA-15 Board
...................... C-7
ENC-2 Board
...................... C-13
SIF-1 Board
....................... C-21
DEC-15 Board
..................... C-25
MT-16 Board
...................... C-31
DSP-3, PS-81 and FU-32 Board .......... C-36
MB-11 Board
...................... C-43
Frame Wiring
...................... C-53
REPLACEABLE PARTS
D-1. Exploded Views and Parts List .......... D-1
D-2. Electrical Parts List .................. D-9
D-3. Accessories Supplied
................. D-30
E. PARTS CHANGE INFORMATION

SECTION 1
OPERATION
The PCM-1630 is a digital audio processor
for professional use, designed to be used
with a Sony BVU-800DA/800DB videocassette
recorder, a DMR-2000/4000 digital master
recorder or any other Sony professional VTR
to create a professional PCM recording and
playback system.
1-1. FEATURES
High-performance recording and playback
The PCM recording and playback system,
including the PCM-1630 and recorders such
as a DMR-2000/4000 and a BVU-800DA/DB,
gives high performance with the following
characteristics:
Frequency response:
dB
20 Hz to 20 kHz +0.
5
-1.0
Dynamic range: more than 90 dB
Distortion: less than 0.05%
Wow and flutter: below measurable limit
Digital dubbing with no deterioration
When the unit is connected to two recorders,
sound can be dubbed digitally with no
deterioration, due to the digital dubbing
function of the unit.
Synchronization with video equipment
The unit can be synchronized with an NTSC
composite sync signal from a VTR.
Electronic editing
When the unit is used with a DAE-1100/llOOA
digital audio editor and two recorders, a
program can be automatically and
electronically edited with precision, and
the quality of the editing is more
excellent than splice-editing of an analog
tape.
Emphasis circuitry
The built-in emphasis circuit improves the
signal-to-noise ratio of high frequencies
by raising their recording level and
lowering their playback level.
Serial data format and interchangeability
A serial data format is employed as a
digital input/output format. Since this
format is interchangeable with that of a
PCM recording and playback system using a
Sony PCM-1610 digital audio processor, it
is possible to directly transmit and
receive digital data between this unit and
the PCM-1610 system. Tapes recorded with
this unit can be played back with a
PCM-1610, and vice versa.
This unit can be used instead of a PCM-1610
in a PCM recording and playback system
using a PCM-1610. <The remarkable
difference between two units is that the
PCM-1630 does not incorporate a time code
generator, while a PCM-1610 has a built-in
time code generator.)
Two sampling rates selectable
A sampling rate is selectable for recording
at either 44.056 kHz <corresponding to the
NTSC TV system) or 44.1 kHz (for a compact
disc and digital audio system) • In an
external sync mode, the unit is
automatically synchronized with either
frequency by synchronizing with an NTSC
composite sync signal or a word sync
signal.
Linear phase response
To improve the phase response, phase
compensation filters are incorporated in
the AID section, and over-sampling FIR
(finite impulse response) filters are
incorporated in the D/A section.
1-1 (E)

Level meter for easy setting of a reference
level
The level meter with a reference marker
function provides two types of signal level
indications for precise setting of
recording and playback levels.
Two pairs of composite digital (video)
signal inputs
The unit is equipped with two pairs of
composite digital (video) signal inputs, to
make it possible to select alternately
composite digital (video) playback signals
from two recorders.
Status connector
The status connector, which outputs error
data of PCM recorded tapes, makes it
possible to analyze tape errors when
connected to a DTA-2000 digital tape
analyzer.
Small power consumption
Newly developed LSis incorporated in the
logic circuitry reduce power consumption,
which enables adoption of a linear power
supply in the unit.
Optional printed circuit boards
Optional printed circuit boards make it
possible to extend functions of the unit.
• RAR (Read After Read! function
When the unit with an optional RAR board
(DABK-1630) installed is used with a
digital audio recorder which has a
read-after-read function (such as a Sony
DMR-4000 digital master recorder), the
playback has very high reliability. In
addition, with the RAR board installed, a
read-after-write function for dubbing and
editing can be used with this unit.
• Digital I/0 interface
When optional digital I/O boards
(DABK-1631) are installed, the analog
input/output connectors provide digital
input/output data which conforms to the
AES/EBU standards.
1-2. SPECIFICATIONS
Number of channels
Modulation system
Sampling frequency
Transmission rate
Code format
Quantization
Dynamic range
Harmonic distortion
Wow and flutter
Frequency response
Signal delay time
Analog inputs
Analog outputs
1-2 (E)
2 channels
PCM system conforming
to the NTSC standard
television signal
44.1 kHz or 44.056 kHz
3.5831 Mbit/sec. or
3 .57 95 Mbi t/sec.
Equivalent to 6 words
in 1 H of NTSC TV signal
16-bit linear
quantization
More than 90 dB
Less than 0.05% (at
reference input level)
Below measurable limit
20 Hz to 20kHz +0•5 dB
-1.0
DIGITAL IN (ENC IN) to
DIGITAL OUT (DEC OUT):
Approx. 9.7 msec
ANALOG IN to ANALOG OUT:
Approx. 10.5 msec
(increasing by 4.8 msec
in RAR model
ANALOG INPUT
CH-l(D-Il/CH-2:
Cannon XLR-3-31 type,
40 k ohms balanced/20
k ohms unbalanced
Reference input
level: +4 dBs (to +14
dBsl
Maximum input level:
+24 dBs
(0 dBs = 0.775 V rms)
ANALOG OUTPUT
CH-1 (D-0) /CH-2:
Cannon XLR-3-32 type,
balanced/unbalanced
Less than 50 ohms
(600 ohm load
permissible)
Reference output
level: +4 dBs (to +14
dBsl
Maximum output level:
+24 dBs
(0 dBs = 0. 775 V rms)

Composite digital (video) inputs
COMPOSITE DIGITAL INPUT
A/B: BNC-R type,
75 ohms unbalanced
0.714 Vp-p (data
level 60 IRE) ~20%
COMPOSITE DIGITAL A/B:
8-pin multi-
connectors,
75 ohms unbalanced
0.714 Vp-p (data
level 60 IRE) ~20%
Composite digital (video) outputs
COMPOSITE DIGITAL
OUTPUT 1/2: BNC-R type,
75 ohms unbalanced
0.714 Vp-p (data
level 60 IRE) ~lO%
COMPOSITE DIGITAL A/B:
8-pin multi-
connectors,
75 ohms unbalanced
0.714 Vp-p (data
level 60 IRE) ~10%
Composite sync inputs
COMPOSITE SYNC INPUT
1/2: BNC-R type,
75 ohms unbalanced
4 Vp-p, composite
sync negative
Composite sync outputs
Digital inputs
Digital outputs
COMPOSITE SYNC OUTPUT
1/2: BNC-R type,
75 ohms unbalanced
4 Vp-p, composite
sync negative
DIGITAL I/0: BNC-R
type,
TTL compatible,
32-slot serial format
1. 4112 Mbit/sec.
or 1.4098 Mbit/sec.
DIGITAL I/0: BNC-R
type,
TTL compatible,
32-slot serial format
1.4112 Mbit/sec.
or 1.4098 Mbit/sec.
Word sync input
Word sync output
Status output
Headphone output
WORD SYNC INPUT: BNC-R
type, TTL compatible
Input frequency range:
44.1 kHz ±s Hz
44.056 kHz ±5 Hz
WORD SYNC OUTPUT: BNC-R
type,
TTL compatible
STATUS: 25-pin D-sub
type connector,
RS-422 and TTL
compatible
HEADPHONES: Stereo
phone jack (8 ohms)
Connectable recorders
Sony DMR-2000,
DMR-4000, BVU-800DA/DB,
BVU-2008, BVH-2000,
BVH-1100, BVH-llOOA
Recommended editing system
For elementary edit:
PCM-1630 and two
DMR-4000s
For
precise
edit:
PCM-1630,
DAE-1100
or
DA.E-llOOA,
and two
orm-2ooos,
two
m!R-4000s,
two
BVU-800DBs
or one
DMR-4000 and another
recorder
Operating temperature o0c to 40°c
( 32°F to 104°Fl
Storage temperature
-20°C to +60°C
(-4°F to +140°Fl
Power requirements 100/120/220/240 V ac
±10%, selectable
50/60 Hz
Power consumption
Dimensions
Weight
90 w
424 x 200 x 530 mm
(w/h/dl
(16 3/4 X 7 7/8 X
20 7/8 inches l
including projecting
parts
26 kg (57 lb 5 OZ)
1-3 (E)

)
u
)
Accessories supplied
Extension board EX-71
(l)
Rack mount adaptor
set)
(1
Connection cables with
BNC connectors (2)
8-pin multi-cable
VMC-3P (l)
AC power cord (1)
Operation and
maintenance manual (1)
Design and specifications subject to change
without notice.
Optional accessories
RAR board (RAR-1): DABK-1630
Digital I/O boards (DI-5/D0-17): DABK-1631
EI format boards (ENC-5/DEC-22/RAR-2):
DABK-1632
l-3. RECOMMENDED EQUIPMENT
BVU-BOODA/DB
U-matic videocassette recorder
This unit can be used as a recorder and
player in various systems, such as a
recording/playback system with a PCM-1630
digital audio processor, or an editing
system with a DAE-1100 digital audio
editor. Using this unit, the SMPTE time
code can be recorded on and read out from a
tape's time code track. The unit also
features a capstan servo, a framing servo
and a logic control system.
DMR-2000 digital master recorder
This unit is designed to be used with the
PCM-1630 digital audio processor to record
and play back digital-quality,
high-fidelity sound. When a DAE-1100/llOOA
digital audio editor is used in the system,
highly accurate digital editing is possible
to produce master tapes, which can be used
to produce compact discs.
I l I
Ui I
I --~I
I
I ...
:. e
DMR-4000 digital master recorder
This unit is a recorder for the new
generation of CD mastering equipment and
features RAR (Read After Read) and RAW
(Read After Write) functions.
When the DMR-4000 is combined with the
PCM-1630 and the DABK-1630, these functions
will be activated giving the system a high
level of reliability and efficiency.
1-4 (E)
II
I
~·

DAE-1100/llOOA digital audio editor
This unit is used with a PCM-1630 digital
audio processor and a BVU-BOODB or
DMR-2000/4000 recorder, to provide fully
automatic digital-to-digital,
high-precision
audio
editing.
The unit
also
features a
search
dial
for quick
access
to
an edit
point,
an
edit
rehearsal
function and a review function.
DTA-2000 digital tape analyzer
This unit is designed to output error data
of PCM recorded tapes to a printer
according to the status signals from a
PCM-1630 digital audio processor.
1-4. PRECAUTIONS
1-4-1. On Power Supply
The unit is designed to operate on 100,
120,
220
or
240
V ac.
Before
connecting
the
unit
to the
power
source,
check to see
that
the unit's
operating
voltage is
identical with the local power line
voltage. The voltage selector is located
on the rear panel. If the voltage selector
must be reset, proceed as follows.
Remove the voltage selector cover with a
screwdriver, pull out the selector and
re-insert it so that the correct voltage
figure appears on the cutout of the
selector.
VOLTAGE SELECTOR
l-4-2. On Ventilation
Good air circulation is essential to
prevent internal heat build-up in the unit.
Place the unit in a location with adequate
air circulation. The ventilation holes
must be unobstructed to operate the unit
properly and to prolong the life of its
components.
1-5 (E)
1-4-3. On Operating Temperature Range
Do not install the unit in a location near
heat sources such as radiators or air
ducts, or in a place subject to direct
sunlight. The temperature range for
correct operation of the unit is as
follows.
Operating temperature: o0c to 40°C (32°F
to 104 °F)
Temperature for which performance of the
unit is assured: 5°C to 35°C (41°F to
95 °F)
1-4-4. On Warm-up Time of the Unit
After turning the power on, wait for more
than 30 minutes to warm up the unit before
operating it.
1-4-5. On Analog Inputs and Outputs
When the ANALOG INPUT and OUTPUT connectors
of the unit are to be used in an unbalanced
connection, be sure to connect the "cold"
pin with the "ground" pin. If the "hot"
pin is connected with the "ground" pin, a
de electric potential may arise and affect
the characteristics.
l-4-6. On Composite Digital (Video) Inputs
and Outputs
The unit is equipped with two types of
composite digital inputs and outputs: BNC
type connectors (COMPOSITE DIGITAL INPUT
and OUTPUT) and S-pin multi-connectors
(COMPOSITE DIGITAL) • For inputs, the
COMPOSITE DIGITAL INPUT A connector and the
COMPOSITE DIGITAL A connector are connected
in parallel inside the unit, and the
COMPOSITE DIGITAL INPUT B connector and the
COMPOSITE DIGITAL B connector are connected
in parallel.
Be sure to use only one type
of connector at a time.
If both types of
connectors are used at the same time and
signals are input to these connectors
simultaneously, the signals will interfere
with each other. (The COMPOSITE DIGITAL
INPUT A connector and the COMPOSITE DIGITAL
B
connector, or the COMPOSITE DIGITAL. INPUT
B connector and the COMPOSITE DIGITAL A
connector can be used simultaneously.) For
outputs, simultaneous use of a pair of BNC
connectors and a pair of S-pin
multi-connectors is possible.
l-4-7. On Short-circuit Protection
The circuit power supply section
incorporates a short-circuit protection
system which cuts off the output voltage
when the power supply section is
short-circuited. When the short-circuit
protection activates, turn off the power
immediately. Wait for more than 30
seconds, then turn the unit on. The output
voltage will be restored to normal.
1-6 (E)

1-5. LOCATION AND FUNCTION OF PARTS AND CONTROLS
1-5-1. Front Panel
@ EMPHASIS indicator-------------,
@ MUTE indicator---------------,
® CRC error indicator---------.
® POWER switch ----------~
(j) ENC IN selector--------
® MONITOR selector -------•
® HEADPHONES jack -------
0 DA IN selector----------'
G) MUTE indication mode selector ___j
G) LEVEL control--------------'
G) PB MODE selector ------------'
([}PB (playback) MODE selector
Used to select the playback signal(s). The
PB MODE indicators illuminate in accordance
with the setting of this selector.
RAR: When an optional RAR-1 circuit board
(DABK-1630) is installed in the unit, the
RAR (Read After Read) function activate.s
when signals are input simultaneously to
the COMPOSITE DIGITAL INPUT A and B
SAMPLING FREQUENCY indicators
Level meter
REF MARKERs
PB MODE indicators
D-I/0 indicators
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...
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@ REC LEVEL
ADJUST controls
([§} PB LEVEL ADJUST controls
REF MARKER selector
PEAK indicafion mode selector
SCALE selector
connectors or to the COMPOSITE DIGITAL A
and B connectors.
When an RAR-1 circuit board is not
installed, the unit operates the same as
when this selector is set to "A" (the PB
MODE "A" indicator illuminates).
1-7 (E)
A: The composite digital A input (input to
the COMPOSITE DIGITAL INPUT A or COMPOSITE
DIGITAL A connector) is selected as a
playback signal. When an optional RAR-1
board is installed in the unit and the RAW
(Read After Write) function of the board is
to be used for dubbing or editing, set the
selector to this position. For details,
refer to the operation and maintenance
manual of the RAR-1 board.
B: The composite digital B input C input to
the CO~lPOSITE DIGITAL INPUT B or COMPOSITE
DIGITAL B connector J is selected as a
playback signal.
0 LEVEL control
Adjusts the volume of the headphones.
(})!~UTE indication mode selector
HOLD: Once the muting circuit activates,
the MUTE indicator lights up and stays lit
as long as the unit is turned on.
AUTO: The MUTE indicator lights up only
when the muting circuit activates .
G)oA IN (digital-to-analog input) selector
Selects the source signal to be sent to the
built- in D/A converter.
INT: Signals input to the COMPOSITE DIGITAD
INPUT
connectors (BNC type) or the
COMPOSITE DIGITAL connectors (8-pin) are
selected.
EXT: Signals input to the DA IN connectors
(in the DIGITAL I/0 connector section) are
selected.
@HEADPHONES jack (stereo phone jack)
Connect stereo headphones with an 8-ohm
impedance.
@)MONITOR selector
REC: Selects the audio signals to be
re~orded for monitoring and level meter
indication.
PB: Selects the audio playback signals for
monitoring and level meter indication.
® ENC IN (encoder input) selector
Selects a source signal to the built-in
encoder.
ANALOG (D-IJ: Selects the signals input to
the ANALOG INPUT connectors.
DIGITAL: Selects the signals input to the
ENC IN connectors (in the DIGITAL I/0
connector section)
DUBBING: Selects the signals input to the
COMPOSITE DIGITAL INPUT or COMPOSITE
DIGITAL connectors.
® POWER switch
Turns the power on and off.
®eRe (cyclic redundancy check code) error
indicator
This indicator lights up when the unit
detects a CRC error in the playback signal.
~ MUTE indicator
This indicator lights up when the muting
circuit activates, depending upon the
setting of the MUTE indication mode
selector.
U EMPHASIS indicator
This indicator lights up when input data
contains a pre-emphasized signal, and the
de-emphasis circuit of the unit activates
to de-emphasize the detected pre-emphasized
signal.
~ SAMPLING FREQUENCY indicators
Each indicator lights up, depending upon
the sampling frequency (44.056 or 44.1 kHz)
of the internal sync signal (INT), external
sync signal (EXT) or signal from the tape
being played back (FsiD) .
Q]J Level meter
The indicators on the level meter light up
to indicate the input level of each channel
during recording, and the recorded level
during playback, depending upon the setting
of the MONITOR selector and the PEAK
1-8 (E)