Sony BVT-2000 User manual

SONY:
DIGITAL TIME BASE CORRECTOR
1
BVT-2000
•
.
. .....
OPERATION AND MAINTENANCE MANUAL

TABLE OF CONTENTS
1.
1-1.
1-2.
OPERATION
FEATURES .. , ...................... 1- 2
SPECIFICATIONS
.. ................... 1- 3
1-2-1. General . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-2. Video . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1- 3
1
-3
1- 3
1
-3
1-3
1-2-3. In put signals ................ ... .... .
1-2-4.
Output signals ... . .................. .
1-2-5. Processor adjustment range
.............. .
1-3 . INSTALLATION INSTRUCTIONS .......... . 1-4
1- 3-1. Installation location
1-4
1-3-2. Installation conditions . . . . . . . . . . . . . . . . . . 1-4
1-3-3. Pre-operatioIJal check list . . . . . . . . . . . . . . . . 1-4
1-3-4. Operating precautions .... ....... ..... ... 1-4
1-4. OPERATION CONTROLS .............. .. 1 -5
1-4-1. Control panel ..................... : . 1-6
1-4-2. Connector panel . . . . . . . . . . . . . . . . . . . . . 1-9
1-4-3. Printed circuit board
................... 1-1 1
1-5. SIGNAL CONNECTIONS ................. 1-13
1-6. OPTIONAL ADAPTOR AND ACCESSO~IES ..... I-14
1·6·1. Dynamic tracking memory board
............ 1-14
1-6- 2. Heterodyne color VTR color processor BK -2003 . . . 1-14
1-7. BREAKERS
........................ . 1-14
1-8. RACK MOUNTING
.................... 1-15
1-9 . SLIDE RAIL MOUNTING ............ .. .. l-I 6
1·10. REPACKI
NG ........................ 1-17
2. CAUTION & OTHER INFORMATION
3. BLOCK DIAGRAMS
4. SCHEMATIC DIAGRAMS
@ I V-1 (N) Board ; In put Video Amplifier ....... 4-1
@ CK -5 (N) Board ;Main Cl ock
1 /3 .. . ........... . ..... . . ..... 4-4
2/3
.. . ....... . ................ 4 -7
3/3 ................... . ....... 4-10
@ CK-3 (N) Board ; Sub Clock ........ . ..... 4 -1 3
@ AD-8 (N) Board ; A-D Converter
1/2
... . ... . . ................... 4-17
2/2
............................ 4-19
® MY-3 (N) Board ; 8-Line Memory .. . ..... . . 4-22
(j) SQ-3 (N) Board ;Sequencer
A/ AB C . . . . . . ..... ._ . . . . . . . . . . . . . 4-25
B/ABC
........ . ....... ...... ... 4-28
C/ABC
........ ........ ........ . 4-31
@ SG-28 (N) Board ;Sync Generator 2
1
/2 ........................... 4-34
2
/2 .......... ... .. . . . ......... 4-37
@ D0-12 (N) Board; Dropout Compensator
1/3
............ . .. . . .. ... ..... 4-40
2
/3 ................. . . ........ 4-43
3/3 . ... . .. . ...... . ............ 4-46
© BD-5 (N) Board ; Bidirex
1/2 ............... . . .......... 4-51
2/2 .... .. ..... . ..... ...... .... 4-53
G) PR-22 (N) Board ; Processor
1/2
....................... . ... 4-57
2/2
........... ............... . 4-59
Q) SG-18 (N) B oard; Sync Generator 1
A/ABCD
........... . ......... ... 4-63
B/ABCD
......... . ..... . ........ 4-65
C/ABCD .
... ....... .... ......... 4-67
D/ABCD
.............. . ... .. . .. .. 4-69
ST-8 (N) Board ; Control Panel
.... ....... 4-71
LP-9 Board
D0-9 (N) Board; Dropout Detector ........ . 4-73
PW-42 (N)
Board; Power Supply . .. . ....... 4-75
AC-16 Board
VS-7 Board
Frame Wiring . . . . . . . . . . . . . . . . . . . . . . . 4-77
MB-5 Board
AT-5 Board
LC-3 Board
SPARE PARTS
Control Panel As s'y . . . . . . . . . . . . . . . . . . . . . 1
Chassis Ass'y . . . . . . . . . . . . . . . . . . . . . . . . . 3
Heat Sink Ass'y
....................... 5
Connector Panel Ass'y ... ... .. .. . .. . ..... 7

1-1. FEATURES
Cor rection range of 4 Hp-p to 12 Hp·p
The memory built into the model can be used to .correct time base
errors up to a maximum
of 4Hp-p in the VTR output. Moreover, by
combining it with the opt ional dynamic tracking memory circuit
board, time base errors up to 12 Hp-p (additi on of one memory
circuit board) can be corrected.
Also, if the above correction range is exceeded, th e BVT-2000
output has no horizontal n;iovement (break-up)
or sync fluctuations.
Wide range dynamic tracking playback
When combined with the model BVH-1100 VTR equipped with a
dynamic tracking mechanism,
th e model a ll ows dynamic tracking
playback from one -fourth the rated speed in the rewind direction to
twice the rated speed in the forward direction. ( Thi s form of
playback is al so known asguard band noise-less playback.)
In th is case, the optiona l dynamic tracking memory circuit board
is required.
Built-in 9- bit analog-digital converter
The BVT-2000 processes the video signals by converting the analog
signals to the 9-bit digital signals. With this system, S/N deterioration
of the VTR playback signal which is caused by using the TBC can
practically be ignored.
Clock frequency four times the value of subcarrier frequency
The clock frequency required to convert the vid eo signals into
digital data is sel ected to four times the subcarrier frequency and so
a K factor of less th an l% and a flat frequency response up to
4.2 MHz are obta in ed without taxing the signal processing functions
in any way.
1 H prior d ropout compensation with digital Y /C separation
Thanks to the provision of a digital dropout compensator, the
dropout section can be r ep laced by a l H prior signal featuring a
high signal correlation.
Since 1 H prior drop o ut compensation displays a higher correlation
of the signals in the replaced section than 2 H pr ior drop out
compensation,
the dropout co mpensa tion effect is greatly improved.
Furth er mor e, since digital Y/C separation is employed for the
drop ou t co mpensati on, a high stability is yield ed and there is no
need to adjust
the gain or phase.
Synchronizes to external refer en ce signals with high and low speed
tape playback
The BVT-2000 can synchronize the VTR ou tput to external
reference sign
al s and produce stable color while the tape is set to
the fast forward, rewind or sl ow m ot ion /st ill p la yback if the tape is
traveling
at not more than l0 times faster or slower than th e normal
tape speed.
Built -in velocity error compensation
The phase error is con tinu ous ly compensated for within each li ne
due to tlie inclusi on of the bu ilt-in velocity error compensator.
The BVT-2000 is also equipped with a unique high-speed auto-
matic phase contro l (APC) which, in company with the velocity
error compensator, helps
to keep the residual phase errors down to
within
±2 .5 nse cs for col or signal s.
Built-in s ync generator
The bu ilt-in sync generator can be gen locked to external reference
video signals, or composite sync signals, subcarrier by setting th e
switch to the proper position when required.
When the gen l
ock signa ls are n ot connec ted, sync is generated
auto mati ca lly by the internal source.
1 -2
Picture improvement functions
As outlined below, the BVT-2000 f eat ures a numb er of picture
improvement functions.
• Cable compensation
The cable co mp ensation circuit built into the input video circuit
enabl
es deteri~ration to the frequency response caused by the
cable to
be compensated.
• Differential gain compensation
Differential gain produced
by the VTR can be linearly compen-
sa ted for across a range of ±8 %.
• Differential phase compensation
Differential phase produced by the VTR can be linearly
compensated for across a range
of ±8 °.
• Chrominance noise reduction
By providing a line adding mode
in the chroma system, the
signal-to-noise ratio
in the chroma system can be improved.
Built -in video processor
The video level, chroma level, set up level, hue level, system
subcarrier phase and
the system sync phase can all be ad ju sted with
the built-in video processor.
Shaping during the vertical blanking period
Unnecessary vid eo signals in the vertical blanki ng peri od can be
selected
at any line unit and replaced by pedestal potent ial.
Built -in automatic advanced sync generator
An automat ic advanced sy nc generator is self-conta in ed and this
automatically c
ontrols the advanced sync phase which is fed out to
the VTR so that the phase of the playback video signals is brought
to the cent er of the correction range while the BVH-1000 or BVU-
100 and BVU-200A is be ing employed.
Thi s means that there is no need to align the advanced sync phase
when changing over tapes.
Attachable adapter for heterodyne color VTRs (option)
It is also possible to attach an adapter (BK-2003) whi ch conver ts
playback signals from·a h eterodyne col or VTR without a subcarrier
input connector into standard broadcasting signals.

r
1-2. SPECIFICATIONS
1-2-1. General
Power requirements
Power consumption
Operating
temperature
Humidity
Weight
1-2-2. Video
Band width
Signal to noise ratio
(unweighted)
Differential gain
Differential phase
K-factor (2T Pulse & bar)
Correction range
Residual error
Chrominance/Luminance
delay
1-2-3. Input signals
Off tape video
Reference video
or
sync
and
subcarrier
Dropout compensator
reference signal
Remote in
* Off tape (video)
(pin 1, pin 2)
* DT-V (pin 3, pin 4)
* Off tape mode (pin 5)
* DOC pulse (pin 6, pin 7)
* Play status (pin 8)
*REC sync
* Confidence mode (pin 12)
* n
connect (pin 14)
AC
100 / 120 /22 0 /24 0 V ± 10 %, select·
able 48 -64 Hz
620W
0°C - 40 °C
10% - 90 % (non condensed)
40 kg (88 lbs)
±0.3 dB to
4.2 MHz
58dB
2%
20
1%
±2 H (without BK-2001)
±6 H (with BK-2001)
Color: ±2.5nsec
Monochrome : ± 15n scc
20 nsec
NTSC composite video, sync negati ve
1 .0 Vp-p ±3 dB, 75 ohms
1.0 Vp-p ±3 dB, 75 oh ms , ON/OFF
4.0Vp- p ±3 dB, 75 ohms, ON/Off
1.0 Vp-p +6, -3 dB, 75 ohms, ON/OJ:F
Dropout pulse, TTL level (for BVH-
1000/1100) (Dropout: Low)
Hi gh impedance
or off tape Rr signal, 0.5 Vp-p ±3 dB,
75 ohms (for BVU-200A, BVU-100)
High impedance
NTSC com posite video, sync negati ve
1.0 Vp-p ±3 dB, 50 ohms
TTL level, Hi gh impedance
TTL level, High im pe dance
Off t ape = Hi gh
TTL level (Dropout : low)
TTL level, High impedance
Pla y status = Hi gh
TT L level, Hi gh impedance
TTL level, Hi gh impe da nce
Confidence = Low
TTL level, High impedance
n conn ect = Low
1- 3
*OT mode (pin 15) TTL level, Hi gh impedance
Dynamic trackin
g= L ow
*Color framing pulse(pin 16) TTL level, Hi gh impedan ce
*The se signa ls are th e inputs from the Multiple connector.
(Multiple
co nnec tor vid eo input takes priority of the BN C connec-
tor v id eo input.)
1-2-4. Output signals
Video-1 }
Video-2
Video-3
Advanced sync
1.0 Vp-p co
mpo site video
75 ohms,
sy nc negative
1.0 Vp-p
com posite v id eo
sy nc ne gat iv e
0.7 Vp-p non-composite video
75 ohms
4.0Vp-p ±0.8 Vp-p
composite syn
c, 75 ohms
Subcarrier (to U-matic only) 1.0 Vp-p ±0.2 Vp-p,
75 ohms
Remote
out
The same signal ou t with remote in
* fH (pin 10, pin 11) TTL le
ve l, Hi gh impedance
*This s
ig na l is the output s from the Multiple connector.
1-2-5. Processor adjustment range
Output video level
Chroma level
Set up level
Hue
System sc phase
System sync phase
Video phase
DG
DP
±3 dB
±3 dB
0- 15 IR E
± 15 °
360° p-p
±3 micro sec.
± 560 nsec p-p (280 nse c/s tep)
±8 %
±8 0

Dimensions
• l
LO
<O
N
1 ----- 'J
r------------1 - -42 4 __ [
mm
1·4
1·3. INSTALLATION INSTRUCTIONS
1·3·1 . Installation location
• Install
the BVT-2000 in a l ocat ion which is dry and well
ventilated.
• Do
not install in a room with a hi gh temperature or near a heat
source.
• Avoid installation in
dusty areas or areas which are subjected to
vibration.
• Avoid areas where high electric
or magnetic fields arc to be
found.
• Avoid areas where
the BVT- 2000 will be exposed to direct
sun
li g ht , other strong li ghts or flashes of light.
1-3-2. Installation conditions
• Ensure that a gap
of at least 30 ems is left between the rear
co
nn ector panel and any adjacent surface.
• Do not bring cables
or any othe r objects into contac t wi th the
metal netting
of the rear panel ventilator.
• Bear in mind
the following po int s when rack mounting.
Do
not install the BVT-2000 over any power supplies or other
equipment which radiates heat.
When mounting equipment into
the same rack below the BVT-
2000, leave a clearance of at least 3 ems between the units.
1·3·3. Pre·operational check list
J) Confirm that t he VOLTAGE SE LECTOR on the connector
panel
is set to th e line volta ge of your area.
2) Check that the POWER switch is at the Of f' positi on .
3) Insta
ll the BVT-2000 in a rack or l ocation whi ch meets the
con di tions outlined above.
4)
Check the input and o utput lines.
5) Open the front control panel and check that all the prin te d
circuit boards have been inserted correctly.
Check th
at the board location number (at the bottom) ta ll ies
with
the board n um ber (grip part).
6)
Turn the POWER switch on, and set all the controls, variable
resistors
and sw itches to their proper positions in accordance
with the instructions given later in this manual.

r ..:1
0
1- 3-4 . Operating precautions
1) Blinking of POWER or INPUT LEVEL lamps
If the temperature ins id e the BVT- 2000 rises to an abnor·
mally high level, then
the above lamps will blink. Operation
under these conditions
can lead to equipment fa ilure.
Immediately carry out the following inspection:
• Check for a high ambi ent temperature.
• Check the rear fan grille, and ensure
th at it is n ot blocked
with dust.
• Check the vent
il ator fan to see if it is rotating properl y.
• Check the insta ll ation location for abnormaliti es.
I f, after checking and inspection for faults and mal fu n c-
tion s, the cause of the temperature rise cannot be pin·
po inted, switch off th e power immediately and consult the
Sony broadcasting services.
2) Inserting and removing the printed circuit boa r ds
As a rule, avoid inserting and removing the printed circuit
boards. However, wh
en such an •opera tion is abso lu tely
necessary, observe the following i
mportant points.
• Always make sure
that the power is off when in serting and
removing the boards.
•
Wh en inse rt ing the boards, always check that their slot
number
(at the bottom of the frame) tallies with the board
number (grip section), and always
in se rt in the proper
location.
• Before turning on the power, check the position
of the
boards for a second time.
If the above in structions are not fo ll owed, the c ir cuitry
may be dama
ge d.
1-5
1-4. OPERATION CONTROLS
Th e switches and co nt rols which are regularly used are a ll located on
the front panel. These are on the main panel where they are in view
at all times,
or on a sub-panel where they are covered by a small
door.
The switches and variable resistors which seldom require adjustment
af t er initial setting are located on the printed circuit boards.
Access
to these is obta in ed by opening the panels as shown below.
1) Openi
ng th e control panel Pc boards
2) Opening
the connector panel

1-4-1. Con~rol panel
t------------------------ --Q) POWER switch, POWER lamp
~--@ INPUT LEVEL control, INPUT LEVEL PRESET switch, INPUT LEVEL lamps
~------- ---- ---@VIDEO control, VIDEO PRESET switch
~----- -- ---@)CH.ROMA control, CHROMA PRESET switch
~---------@SET UP control, SET UP PRESET switch
~-------- --@HUE control, HUE PRESET switch
SONY
DIG IT AL TIME BASE CO RRE CTOR
1N P UT LEVEL
C> c:J Cl
-ou u1 -
BYPASS C. N. R,
<i) NORMAL/BYPASS switch, BYPASS lamp--- ~
@ CNR ON/OFF switc h, CNR lamp ______ _ _,
@ DG control, DG PRESET sw itch----------_,
- OF FTAP E \I PHA SE-
D El AV
@ DP con trol , DP PRESET s witch- ------- -- --~
@V IDEO PHASE control, VIDEO PHASE PRESET switch - ---- ~
@ SYSTEM SYNC PH AS E control, SYSTEM SC PHASE control- -- -- ~
@ LOCAL/REMOTE s wi tc h, REMOTE lamp---- - -------- ~
01 fU CT COLOR
@)DIRECT COLOR/U-matic switch, DIRECT COLOR/U-matic lamp - - ------- --'
·@>OFF TAPE V-PHASE lamps _________________________ ....,
1-6
f

r
c
G) POWER switch, POWER lamp
Wh en th e POWER sw it ch is turned on, the POW ER lamp lights
up and power is supp li ed to the cir cu itry. If the temperature
inside
the BVT-2000 should rise to an unu sually high level
(becau se of a ventil ato r breakdown, for in stance), the POWER
and INPUT LEVEL l
amps will blink on and off. Search for the
cause
of th e. malfun ction as described in "Blink in g of POW ER
or LEVEL INPUT l
amps" under secti on 1-3.
@ INPUT LEVEL control, INPUT LEVEL PRESET switch, IN-
PUT LEVEL lamps
®
MANUAL: The INPUT LE VEL co ntrol can be used to set
the A/D converter's input le vel.
• When the left red lamp li ghts up, this means that the input
level is l
ow and that the S/N ratio is unfavorable.
• The ce nter green lamp li ghts up to indicate the best possible
setting.
• Th e right red l amp shows that th ere is a possibility that the
high level
compo nent may be clipped due to overloading.
Detection
of the level de pends on the VTR's sync level and
n ot on the signal content. .
PRESET: The TBC input amp gain is set to the neference
level regardless of the position of this contro l.
VIDEO control, VIDEO PRESET switch
MANUAL: Th
is enables the @ VIDEO-I, @ VIDE0-2
and @ VIDE0-3 (described from now as the
TBC ou tput) video level to be adjusted within a
PR ESET: range of
±3 dB.
Th e TBC out put video level is set to the reference
level regardless
of the position of this control.
© CHROMA control, CHROMA PRESET switch
MAN UAL: Thi s co ntrol a ll ows the TBC ou tput chroma level
to be adjusted with in a range of ±3 dB.
PRESET:
Th e TBC ou tput chroma level is se t to the
reference level regardless of the position of this
control.
@ SET UP control, SET UP PRESET switch
MANUAL: This co ntrol a ll ows the TBC output se t up level
to be adjusted with in a range from 0 to 15 I RE
units of the reference leve l.
PRESET: The TBC ou t put set up level is se t to the refe r-
ence level regardless of the positi on of this control.
@ HUE cont rol, HUE PRESET switch
MANUAL: This
contro l allows the TB C ou tput hue levei
(bur st and chroma relati ve phase) to be adjust-
ed across a range of± 15°.
PRESET: The T BC ou tput hue level is se t to the reference
level
re gardless of the position of thi s co ntrol.
0 NORMAL/BYPASS switch, BYPASS lamp
NORMAL: A time-compensated o utput appears in the TBC
ou tput.
BYPASS: A bypassed ou tpu t appears in the TBC o utp ut,
and the BYPASS la
mp comes on.
@ CNR ON/OFF switch, CNR la mp
ON: The vid eo signals are Y/C separated, and on ly the
chroma signal is line added to the IH prior signal and
averaged.
The chroma S/N ratio is thereby improved
by 3 dB.
Of'f' : The vid eo signal bypasses-t he above processing system.
1-7
®
DG control, DG PRESET switch
MANUAL: This control is used to linearly compensate the
differential gain
of the TBC output across a ra n ge
of ±8 %.
PRESET: The differential gain bypasses
the above process-
ing system.
DP control, DP PRESET switch
MA NUAL: This con trol is used to linearly compensate the
differe nti al phase of the TBC ou tput across a
range
of ±8°.
PRESET: The differential phase bypasses
th e above process-
in g system.
@ VIDEO PHASE control, VIDEO PHASE PRESET switch
MANUAL: This control is used
to move the video phase of
the TBC output within a range of 900 nsec p-p (1
PR ESET: step =
28 0 nsec).
The TBC o utp ut v id eo phase is set to the referen-
ce level regardless of the pos it io n of this co ntrol.
@ SYSTEM SYNC PHASE control, S_YSTEM SC PHASE control
These two controls are used when you want
to adjust the
SYNC phase and the SC phase of the TBC outpu t with respect
to the BVT-2000
's reference inpu t.
For instance, they can be used to bring the ou tput phase in line
with the stati on's reference, or when two or more VTRs and
TBCs are being used to produce fades, l ap -dissolve and special
effects.
• Th e SYST EM SYNC PHASE ad ju stab le range is ±3 µser.
• The SYST E.M SC PHASE adjustable range is 360° p-p.
There is usua
ll y virtually no need to move these two controls
when performing ordinary maintenance work after the
BVT-2000P has been installed in the studio,
etc .
In cases like this, the phase may under
go a great change when
they are touched in error if the variation range is too great and
so by partia
ll y remodeling the ST~8 printed circuit board, the
variable range
of the contro l panel's SYSTEM SYNC PHASE
and SYSTEM SC PHASE controls can
be reduced to about
one-tenth of their normal range. The remaining nine-tenths are
ad ju sted with the vrs on the ST-8 printed circuit board.
@ LOCAL/REMOTE switch, REMOTE lamp
LOCAL: All the co nt rols and sw itches are operated on the
front panel of the BVT -2 000,
REMOTE: Operation is provided by the controls and
sw itches on the optiona l remote control un it
for TBC applications regardless of the positions
of the controls and switches on the BVT-2000
f ront pane l.
Th e R EM OTE lamp comes on.
@ DIRECT COLOR/U-matic switch, DIRECT COLOR/U-matic
lamp
DIRECT COLOR:
U-m
at ic:
Set the switch to this positi on when
combining the BVT-2000 with a direct
color VTR (such as Sony's BVH-1 100).
The DIRECT COLOR lamp comes on.
Set the switch
to this positi on when
combining the BVT-2000
with a U-matic
VTR (such as Son y's BVU-200A or 100).
The U-matic lamp comes on.

@ OFF TAPE V-PHASE lamps
When producing time base 'correction ranges of ±2 H and ±6
H, it is first necessary to ha ve one or two 8-line memory
boards, respectively. (Only one board is prov id ed with the
m
ode l and the ot h er boards are available as opti ons BK-2001-)
In addition, the phase
of the VTR playback outp ut must be
advanced 4 H or 8 H, respectively, as average values ahead
of the TBC outp ut phase. If the phase adv ance does n ot tally
with these values, there is no change in
th e width of the co rrec-
tion range at 4 Hp -p and 8 Hp-p, but the center va lue of the
correc tion shifts and so it appears that the co rrection range is
correspondingly narrower.
This point is im por tant es pecially when the correction range is
to
be made as wide as possible such as with dynamic tracking
playback
or rolling tape playback. If the playback output
phase shifts from the correction range, this will be translated
into a shift in the picture w ith the TBC output in the verti ca l
direction.
The OFF TAP E V-PHASE l am ps enable the VTR playback
output phase to be checked to see if it is pr ope rly advanced
ah ea d of the TBC ou tpu t phase.
ADVANCE: Lig ht s up when the VTR o utp ut phase has been
advanced
too far ahead.
I N: Lights up wh en the VTR o utput phase is
co rrectly pos itioned.
DELAY: Lig
ht s up when the VTR outpu t phase is
delayed.
When t he BVH-500 or BVH-1100 is being e mpl oye d, the
VTR o
utpu t phase is designed to be correct without a special
signal having
to be sent from the TBC to theVTR.
Therefore, when these VTRs are being used and th e AD-
VANCE
or the DELAY lamp li g ht s up, it is necessary to c he ck
on an osc
ill oscope whether the TBC correction range is
sufficie nt for the fluctu at ion in the VTR o utput phase or
wh et her the average VTR out put phase is centered in the
correction range.
If the phase is n ot correct, adjust t he switch inside the VTR.
Furthermore, the VTR output phase will not be co rrect unless
some action is taken, when the BVH-1000, BVU-100 or
BVU-200A is being operated. Therefore, it is necessary to send
an advanced sync signal from the TBC to the VTR and app ly
the vertical sync of the VTR with this signa l.
This parti cu lar time base co rrector has a built-in circuit which
a ut omatica ll y co ntr ols the advanced sync phase so t ha t the
above VTR playba ck phase is brought p rope rly into the ce nt er
of the correction ra nge. Thi s means that it is no longer
necessary
to a li gn the advance sy nc phase as it was with
co nventional time base co rr ectors when changing the tape.
(Manual operations are also possible using the in te rn al selector
switch.)
4
1-8

1-4-2. Connector panel
CD OFF TAPE VIDEO (to be corrected)- ----- -- ---- ~
@DOC PULSE (dropout pulse) - --- ------- ----.
@ RF (off tape) _ ____ ________ ___ _ _ ..........,
© VTR (Multiple connector for BVH-1100) --------- -.-.-----.
@ FRAME PULSE ------ -------- -~
@ PLAY STATUS --- -- - ------ ----.
@AC OUT
(max 200VA) unswitched
@) VIDE0 -1 (corrected video) 0 VOLTAGE
SE L EC TOR
@ VIDE0 -2 (corrected video)
'-- ------- @AC IN
@ VIDE0-3 (corrected video)
'-------- @ COMP VIDEO (reference) In - Out
@ NON COMP / COMP switch '------ ---- ---- @ 75D ON /OFF switch
@ SC (jittered, to U-matic type VTR)
'----- --------- @ SC (reference) In - Out
@ ADV SYNC (to U-maticor BVH type VTR)
'------ --- ----- --@ 75 D ON/OFF sw itch
@ SPARE ---- ------- - -t--' '------------ @COMP SYNC (reference) In - Out
'--------- -------- @75 S1 ON /OFF switch
.____ _ _____ __ ______ _ @ REMOTE In - Out
1-9

Use the CCY cables suppli ed with the TBC for the co nn ect ions
between the VTR and TBC. All the
other input and output signal
con
ne ctions emp lo y BN C connectors.
• Loop-through connectors are provided for Refe
ren ce COMP
VIDEO, Reference SC, Reference COMP SYNC, and so when
this loop-through feature is employed,
turn the @, @, @
75n ON/OFF swi tc hes OFF. In other uses, turn the switches
ON.
•
By selecting the @ NON COMP/COMP switch, the @
VIDE0-3 output can be turned in to composite video or
non-composite video.
• Reference COMP VIDEO, Reference SC,
or COMP SYNC is
required to
ge n lock the TBC to the external reference signal.
Sel
ect the REFERENCE SELECT switch OQ the SYNC
GENERATOR 1
bo ard to l oc k at REFERENCE VIDEO or at
REFERENCE SYNC.
A sufficiently low time base error is required for the
ge n-lock
signal
s, and if this error is high, the proper 11erfo rmance of the
BVT-2000 will n ot be disp la ye d.
When the sig nal is no t conn ec ted to the reference input, the sync
ge nera tor inside the BVT-2000 au tomat ically becomes the
reference.
When using the sync generator inside the BVT-2000 to generate
the reference signal, its frequency stabili
ty is determined by the
crystal oscillator
on the SYNC GENERATOR 1 printed circuit
board. For normal use the stab
il ity is about 30 ppm across a
temperature range
of 0°C to 40 ° C. If this is n ot suffici en t for the
intended operation, replace the crystal oscillator with a
unit
having th e required stab ili ty or app ly a stable reference signal
from an external source.
INPUT /OUTPUT connector specifications
1-10
CONNECTOR
DESCRIPTION
INPUT
CD OFF TAPE VIDEO (to be BNC, 1
Vp -p, 75 ohms
corrected)
(3) DOC PULSE (dropout
BNC, TTL level, High
pulse) impedance
@R F (off tape) BNC, 0.5
Vp-p, 75 ohms
@) VTR (Multiple connect or
for BVH-1100)
@ FRAME PULSE
BNC, TTL level, High impedance
@
PLAY STATUS BNC, TTL level, High impedance
@COM P VIDEO (reference)
BNC s, 1 Vp-p, 75 ohms
IN - Out
On/Off Switch
@sc (referer.ice) IN -O ut
BNCs, 1 Vp-p, 75 ohms
On/Off Switch
@COM P SYNC (reference) BNCs, 4
Vp·p, 75 ohms
In - Out
On/Off Switch
@R EMOTE In - Out
BNCs, High imp edance
@
ACIN
3-pin AC connector
OUTPUT
@ VIDE0-1
(corr ec ted video ) BNC, 1
Vp-p, 75 ohms
@
VIDE0 -2 (corrected video) BNC, 1
Vp-p, 75 ohms
@
VIDE0-3 (corr e cted video) Non com
po si te video/ composite
video, 1
Vp-p
@SC (jitt ered, to U-m atic
BNC, 1 Vp-p, 75 ohms
type VTR)
@ ADV SYNC (to U-m atic
BNC, 4 Vp-p, 75 ohms
or BVH type VTR)
On/Off Sw itch
@
AC OUT
max 200VA, unswitched
@SPARE BNC
Power
connections
Connect the supp li ed power cord to the @ AC I N.
To set the input voltage (100/120 /22 0 /2 40 V ±10%, 48- 64 Hz),
loosen
th e Ci) VOLTAGE SELECTOR's lock screw with a screw-
dr iver. Tight en aga in af ter se lecting the correct voltage.
A power in excess
of 200VA cann ot be fed ou t from the @ AC
OUT connecto r.

1-4-3.
1
-
en
"C
)>
Jl
m
OJ
0
)>
Jl
CJ
-
Printed circuit board
OJO
OJQ
CD AUTO/B&W switch
i'\
"C
i'\ -c
' -t
' -t
I\,)_
l\,l_
oo oo
~z
8z
@CABLE COMPENSATI ON switch
~
i
2 3 4 5 6 7 8 8 8 9
10 11 12 13
IV -1
- - - -
~ ----'-
------
en
"C
OJ
0
en
en
00 00
)>
en
s:
:x:
2
-<
Jl
Jl
-<-
m r
CJ
c
)>
m
"C
0
CJ
z p r
OJ
-t
c
z -0
()
2 m
()
()
Jl
"C
()I= c z z
()
-t
s
W4
m 0 m m m 0 r
()
Jl
Cl
en
m Cl z z 0 < 0m
en
x c
m-
()
s: s:
< 0 r
CJ
z 0
-t
z m m m
()
0
-<
CJ
m
i'\
()
m
m
Jl
()
m
Jl
s: s: Jl
z
Jl 0
Jl
0 0
-t
i'\
m 0
SW
SET
COMPENSATION
)>
s:
)>
Jl Jl
m
-t
"C
-t
-< -<
Jl
()
O(m)
0 m 0 0
~Rl
z
Jl
r
L-
3 5
en
0
)>
I\,)
Jl
~
5 10
~
-t
7
25 0
>--
I-
Jl
en
"C
CJ
~ .
s: s:
)>
()
()
0
Jl OJ
'.2
en
~
r\J
CJ
p
-< -<
CJ
i'\
::"
<
IV -1
I\,)
w w w
cXi
w
r\J
00
IV
u,
I\,)
00
(11
2 SW1 SW
-~
§]-
~
p
P,_ -
~-
~
=
=-SET SWl,2
at the same
p
c:=J
position .
~
~
~
SW SET
COMPENSATION
r
~
1 -75 ns
2 -50
3
-25
4 0
5
+25
6 +
50
7 +
75
@ Y/C DELAY COMPENSATION switch
'------ --- ©DIRECT/ PROCESS switch
@CO LOR FRAMI NG ADJUSTMENT vrs & lamps
~@ COLOR FRAMING NORMAL/ADJUST switc h~ lamp
~(?) DOC ON /OFF switch
~--@ V BLANKING LINE SE LECT switches
'-+-If----+-+-+--------@ LOCK MODE lamps
~ ADVANCED SYNC AUTO/MANUAL switch
'-+---+--+-+--------'0' ADVANCED SYNC PHASE control
@ADVANCE D SYNC PHASE IN l amp
L----t--+-+-- -- ---@ REFERENCE SELECT switch
HD SIGNAL PICK UP
'--+-+-------@V D SIGNAL PICK UP
SIGNAL GND
"-+- --- --@ BURST LEVEL & PHASE controls
'------ ---@ SYNC LEVEL control
Use these vrs only when dividing the
SG-18
@@ ST-8 controls on the control panel.
I
variable range between these vrs and the
tt '-- ------+- ·SYSTEM SYNC PHASE vr}J
...__t _ ===============--SYSTEM SC PHASE vr
Crystal oscillator for internally
generated high -stab ility refer-
ence signal.
(If an oscillat or with a higher
stability is to be used, mount
it in this space.)
1- 11

G) AUTO/B&W switch (13. INPUT VIDEO board)
AUTO: Thi s switch detects if burst is present in the VTR
playback signals, and automatica
ll y sets the system
to col
or or bl ac k-and-white mode .
B&W: This se ts the whole system to m onoc hr ome opera-
tion and the write clock is co nt ro ll ed by the H
SYNC.
@ CABLE COMPENSATION switch (13 . INPUT VIDEO board)
This switch serves to compensate for deterioration in th e
fre
quen cy respon se cau se d by the ca bles between the VTR and
BVT -2000 . Compensation for cable lengths of 0, 5, 10 and
25
me ters corresponding to pins 1, 3, 5 and 7 of SW4 is
available.
@ Y/C DELAY COMPENSATION switch (13. INPUT VIDEO
board)
Thi s switch se rves to co mpensate fo r the Y/C group del ay
difference produced in the VTR or BVT-2000 across a
± IO nsec range.
Th e Y /C delay compensation makes u se of th e all-pass
network, and the delay time of the chroma signal can be
selected wi th re spect to the Y signal in accordance with the
positi
on of this sw itc h.
The del ay time in the chroma band ca n be switched to - 75,
-50, -25, O, +25, +50, and + 75 nsec corresp on ding to the
switch pin position l , 2,
3, 4, 5, 6 and 7.
© DIRECT/PROCESS switch (12. HETERODYNE COLOR
board) Option BK-2003
This switch is used only fo r U-matic VTRs.
DIRECT: Set the switch to this positi on when a heterodyne
col or VTR (such as Sony's BV U- 200A or
BVU-J 00) , which is provided with an SC input
co nn ector for Y /C int erleaving, is connected.
PROCESS: S
et to this position when a hetero dyn e co lor
VTR (such as Sony's
V0-2860) , which does n ot
have an SC input co nn ector for Y/C interlea vi ng,
is connected.
@ COLOR FRAMING ADJUSTMENT vrs
& lamps
@ COLOR FRAMING NORMALiADJUST
switch & la mp
}
(7 . SEQUENCER
board)
This con trol secti on consists of two variable resistors and
two light-emitting diodes. Adjust this section when th e col or
phase must be repeated with a high level of precision, fo r
example, editing accurately a t
ape which is recorded with co lor
fram in g servo, or when composing video anim at ion.
Turn the @ NORMAL/ADJUST
sw itch to ADJUST (LED
li ghts up) and adjust the CD two va riable resistors so th at the
two CD LEDs li g ht up. After adjustm ent, be sure to set the
@ NORMAL/ADJUST switch to NORMAL position. (The 3
LEDs go off .)
If the SYSTEM SYNC PHASE con tro l and the SYSTEM SC
PHASE control arc turn ed afte r ad just ing these two variable
resistors, turn the @N ORMAL/ADJ US T switch to ADJUST,
and make sure that the two LEDs
li ght up . If they do n ot light
up, read
just th e two variable resistors.
Q) DOC ON/OFF switch (6. SYNC GENERATOR 2 board)
ON: Thi s is the normal positi on .
Off': Thi s turns the dropout co mp en sa tion off.
@ V BLANKING LINE SELECT switches (6 . SYNC GENERA·
TOR 2 board)
8 circuit switches
By setting switch 2 and sw i tc h 3 to ON, it is possible to se lect
any
li ne in the vertical blanki ng p er i od which corresponds to
the numb er of the board, and so these are u se d to shape th e
li nes and set them to the pedestal level.
®
LOCK MODE lamps (3. SYNC GENERATOR 1 board)
1-12
Th e appropri ate lamps illuminate to show the typ e of reference
signal being supplied to
th e BVT-2000 (COLOR/SYNC/
INT
ER NAL).
ADVANCED SYNC AUTO/MANUAL switch } (3. SYNC
ADVANCED SYNC PHASE control GENERATOR
ADVANCED SYNC PHASE IN lamp 1 board)
AUTO: This is used to co mpare the reference vertical sy nc
with the VTR playba ck vertical sync phase, and
co ntr ol the advanced sync phase a ut omat ica ll y so
that the playback video phase is brought to the
ce
nt er of the wi ndow.
MANUAL: Th is is used to allow the advanced sync phase to be
cont ro ll ed with the advance sync phase control
trimmer vr3. (Adjust so that the ADVANCED
SYNC PHASE IN la mp lights up. This lamp
co rresp on ds to the OFF TAPE V-PHASE IN lamp
on the fro
nt panel.)
•
Us e the MANUAL mode when there are problems with the
ri
se response in the AUTO mode.
REFERENCE SELECT switch (3. SYNC GENERATOR 1
board)
This sw i tc h is used to set the BVT-2000's reference signal to
COMP VIDEO, SC, or COM P SY NC . In ternal l oc k is
automatica lly set wh en a signal which corresponds to the
position of this switch is n ot con ne cte d to the con ne ct or panel.
HD SIGNAL PICK UP }
@ VD SIGNAL PICK UP (3. SYNC GENERATOR 1 board)
SIGNALGND
The se can be used for the external sy nc signals of the
osci
ll oscope, if so required, when checking the wave-forms of
the TBC se cti on s.
@ BURST LEVEL & PHASE controls (4. PROCESSOR board)
These are used to adjust fi nely the burst level and the burst
phase of the output.
@ SYNC LEVEL c ontrol (4. PROCESSOR board)
This is used to adjust finely the sy nc level of the output.

c
"
1·5. SIGNAL CONNECTIONS
The two most common operational modes of use are shown in the following diagrams.
The required connections are clearly shown in each case.
Observe the advice and information concerning connectors and the printed c
ir cuit board switches given in secti on 1-4 -3 "Printed circuit
boards".
Connec tions with direct color VTR (BVH-1100)
Reference
BVH-1100 BVT-2000
~
REF VIDEO ( COMP
VIDEO
(Referen ce )
TBC (Mult iple connector) CCV cable -
VTR (M ult ip le connector)
VIDE0 -1 }
V ID E0-2 (Output)
V IDE 0-3
, ,
Connections with he terodyn e color VTR (BVU - 200A)
Reference
BVT -2000
BVU-200A -COMP VIDEO (Reference)
VI DEO OUT OFF TAPE VIDEO IN
SY NC IN ADV
SYNC
SC IN -
SC (to U-matic)
RF(OFF TAPE) RF (DOC control)
V ID E0- 1 }
V IDE 0-2 (Output)
V ID E0-3
.
,.
1-13

1·6. OPTIONAL ADAPTOR AND ACCESSORIES
1-6·1. Dynamic tracking memory
board BK-2001
When com bining the BVT-20 00 with the BVH-1 000 for dynamic
tracking playba
ck (guard ba nd noise-less playbac k) , it is ne cessary to
plug o
ne opt ional memory board (same as MAIN MEMORY board
of BVT-2000) into slot numb er 8 (16).
Whereas the correcti on range is 4 Hp-p with o ne MA IN MEMORY
board, two boards
ex pand th is range to 12 Hp-p. It is also possible
to yield prop er pictures with dynam ic tracking playback.
Using the M
EM ORY boards is effecti ve when playing back a tape
containing a great deal
of j itter (for example, a tape which has been
recorded on a p
ortab le U- ma ti c while on the move ). The vertical
phase shift which is produced with a correcti
on ran ge of 4 Hp·p can
be eliminated.
1-6-2. Heterodyne color VTR color processor BK-2003
Use this adapter when converting the playback signals of a
h
etero dyne color VTR (V0-2860) wit hout a s ub carrier input
connector into st andard br oadcast in g sig n als~ or when it is not
possible to ret urn the subcarrier signal to the VTR from the time
base corrector with microcircuits even when a VTR, which is
provided with a subcarrier input co nn ector, is being employed.
The adapter is co nfig ur ed as a single printed circuit board (called
HETERODYNE C OLOR) , an d it is inse rt ed into t he position
mark ed by s lo t number 12 on the time base correcto r.
f or the above instances, se t the DIRECT/PROCESS switch on th e
board to PROCESS, and for a ll ot h er instances, set the sw it ch to
DIRECT.
1· 14
1-7. BREAKERS
When no power is supplied to the BVT-20 00 , ope n the conn ector
panel as in the ph oto below and inspect the two breakers.
If the breakers are OFF, set them to ON but if they return to OFr
after power is supp li ed, inspe ct the power supply and the voltage. If
nothing appears wrong, contact the Sony broadcasting service s.
Two b re akers
-
•

e
1-8. RACK MOUNTING
The BVT-2000 can be rack mounted in a standard 19 -i nch rack by attaching the rack mounting metals to the sides of the cabinet.
Unscrew the screws
on both sides (total of 4). Th en secure the supp li ed rack-mounting metals with the original screws as shown in
the
photo below.
Rack covers
Tight en sc rews on both sides of rack
~n· u~ '""l .,._ $t COJ>'ltCJ()fl
8 ' 1T~l000
\ ~ __ )
Rack mount metal
EIA 19" Rack
1-1 5

1-9. SLIDE RAIL MOUNTING
Ma n ufactu rer :A CC UR IDE
Model : RACK - MOUNT SLID ES MODE L 203
S LID E LENG TH 22"
This hole is not provided.
Drill then when attaching the slide rail.
Screws
(±) KM 4 x 10 (3)
• Wh en transporting the BVT-2000 with a car, be s ur e to mount it to the rack with the slide rails and rack mounting m eta l s.
• In other cases, it is also recommended to mount the BVT-2000 to the rack with the s li de rails and rack mounting metals for
easier attachment, removal and servicing.
1- 16
,,. -

•
I
I
•
•
SECTION 4
SCHEMATIC DIAGRAMS
@IV-1 (N) BOARD : INPUT VIDEO AMPLIFIER
CABLE COMPENSATOR
LEVEL CONTROL
SYNC SEPARAT
OR
BURST SEPARATOR
4-1
I• I
..
)0
..
l•·I
..
H
H
+ •zv 1"
110 LfYll .. -COfll,
.,.
,.
W0[0 "'
.. o
l'L "<110(0 IN
•• 0
fl CONN
°"II
'"
E3
E3
'"
.. 114
f-~l- - +-1'w'--..-'<>' ' •
...
HOO
....
"
I
-··
'
11111)1
)':
IC 4 05fij74lllN
e n• c tt5
,00 100
IOY 10\'
-il--{i- --
I C 6 ~
, .. 'NlSOON
. ..
Z700
IC- 50 AJ'Ott
IC 48 U"Ott
f'C 22 A70 t~
VIOCO A'6P
07.zurn
IC 26 Slll14 L St 2 l •
IC 32 Sti174 0 4ff
Q 5 2SllC4l ~ l
IC 44 A'OI~
~JOEO AltlP
06 lUO l IC17 H.IO 'C P 1Ct6 TLOIUCP I C13.,PC•~K
l,.
0 - 0ll
IC27 I C7
IC24
S Nr4 1.t 1z 31ri1 IM T 4l S1l!iN
4-2
IC82
Q 20zU1H
Ql9 2S•tt1
J NlltltO.
tC 36 MCfOIO ll.
Q17tst40l(
Ot •zsc.ox
O• '
0 16 zurn
O t~ .u.10 022zsuou
, ...
ICS2Mo1'02P
IC63sN74 LSO<*
ll"'NSS
TP -8
IV•l (N)
MA i-1 VIOU>
...
l..f.VlL IHJ
l"e SYNC
..
...
••• H
CO L/ IW 16
4-3

@ CK·6 (N) BOARD (1/3) : MAIN CLOCK
SYSTEM TIMING CONT ROL
AFC
IC-53 SHT41H N IC:-S2 SN74221M
31 GATCD H ll 1N
GAHD H
To2/3~------1
TO 3/3
•
0
IC-P4s•1•e••
tC·N7sN14 1C3 trii
COU tlfrER
4-4
••
..
Cl>
...
IC"'N6SMT •tnM
C0411tT£'1
tC-$5 • •r• s°""
I C-03 SJt741'4N
lc-N!5 ••7 •'"3
cOfMrr,,
tC10••c>ooec
~HA!IC DCT
Q1 72SAS30H Q 1 9HA530M
018 2sc•ox Q202sc•olc
IC-Q3SN 7474N
IC9H.OUCP
IC-N2 !1Nl'4'1•1N
COUNTER
IC·07 wett ••P IC'"'06 Ho101z11
..---------•~c~o---------"-cc~'~-~ro~-~r~"'---~~ - ~~:C~~
IC-Pl SN7400N
rc-01 SNT '41Z-3N
-ov
Cl&O ;fV
QOZl~ ].
'
Vu
I Ve•
IC-P2 SN74 Soott
IC·N3 SNT•o•111
4-6
u"o""
IC-05
IN ~6 23 C M 1N
P·ROltl
tc-R!I
SN7417!1N
LATCH
IC·K4n1"400N
C70
~02•
...,,
0,022
- v
....
....
100
11V
FB312
+sv JN
••
••O
49
••o
50
-sv l.N .. ~
Y~~..-~··e·.-..-~~ .- _.,~_,,,.... ,..,,..,
.. I :. I + ttV IN ,.
Q021 :~
ct90
0.022
CZ
""'
...
,.., l'l!IZ
••o
• •o
-t.ZV IN
CK•5 (N) 1'3
IC'"M4 SN7 4,.4N
SHl~T REf
COUNTER CLU.A TO l / ]
OT CH OUT 26
(DIRECT C OUNT ER HI
..------------------11'?--;~i/3
..-------------"0£"'•..,_"'IEC ~ tl£Nt
TO 2/3
fC-R4 SN 7 474N
•
I
I
•
4-6

•
I
I
@CK-5 (N) BOARD
APC
(2/3)
IC-Mt wo101z'
tct- T o•r r1.
..
MAIN CLOCK
IC-06wc101)3l
IC-04
H010t;U
ltL- T O- TTL
IC-E5
S,'7 4J93N
COU#T ( lf
4-7
IC-E6
SH7 4 $1!1N
••v
IC-S 1SN74ZZ11ii
.... ,
l- J1 SN74SOOH
IC 7 TL.flZCr'
HZV
IC -G 2 SN7' Sl7 ,N
IC 6 u.oe2 c.P
•12V
A\2
10
- 12Y
I C- H 2 SN7'Sl6"
I C-F2 SHT 4 $0 4N
IC- A6 M C. t641P
vco
IC -86 t4010110
.r$i
4-8
"11 16
6Z O
1 2PCS )
llJllltST $1 R( l(_ttf::o 3/ J
IC - C4lwo 1 01 I
IC-05><0•0•" IC - C5 HOt0t}O HLO •••OR ... •ULS<
-- - -- --- - -- r -- -T. 3/3
4-9
r c - A ~HO l 0t 3 1
JC ... A1 HO I Ol2 S
C CL · TO• rYL
CK•5 (N) 2~3
Q 10 ZSA~] OH Q92S...SJ OH
0 11 2SC403C 0 8 2SC4 0]C
IC-04 HO t OIU
ECL- ro-rn
C9 lSK 4] - 2
Q 14 zsc te • H
Ql2 2SC4 05C
Of 31SAll4 4
•••
IC - 92 AM Cl 50 l
+l lV
4,..crey u •c 1
...--: f"-IT.-:-:- TO 3/ 3
-o v