Panasonic AG-7500 User manual

erating
ructions
asa VHS fa A
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625
Video Cassette Recorder
| -A
Model! acl LULU:
Panasonic
Before
attempting
to
connect,
operate
or
adjust
this
product,
please
read
these
instructions
completely.
VQT2882-1

FOR YOUR SAFETY >
CAUTION:
TO PREVENT FIRE OR SHOCK HAZARD AND
IMPORTANT
“Unauthorized recording of copyrighted television
programmes, films, video tapes and other materials
may infringe the right of copyright owners and be
contrary to copyright laws.”
ANNOYING INTERFERENCE, USE THE RECOM-
MENDED ACCESSORIES ONLY.
Be
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:
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ae
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ae
*
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4
Se ree
@ THIS APPARATUS MUST BE EARTHED.
To ensure safe operation the three-core lead supplied
(not for U.K. model) must be connected only into a
standard three-pin power point which is effectively
earthed through the normal household wiring.
Extension cords used with the equipment must be three-
core and be correctly wired to provide connection to
earth. Wrongly wired extension cords are a major cause
of fatalities.
Before connecting to the power supply, ensure that the
your local power supply.
The voltage selector can be adjusted, if necessary, by using
a screwdriver, but this adjustment must be made after
disconnecting the power cord.
m AC POWER CORD CONNECTION (AG-7500-B only)
The wires in the mains lead for this apparatus are
selector on the rear panel is selected to the same voltage as |:
‘
The fact that the equipment operates satisfactorily does
not imply that the power point is earthed and that the
coloured in accordance with the following code.
Important
installation is completely safe. For your safety, if in any
doubt about the effective earthing of the power point,
consult a qualified electrician.
EARTH
NEUTRAL
Mm DO NOT REMOVE PANEL COVER BY
UNSCREWING.
To prevent electric shock, do not remove cover. No user
serviceable parts inside. Refer servicing to qualified
service personnel.
Mains Lead
@
VOLTAGE
SELECTOR
SETTING
as
follows:
The power cord must be
disconnected from mains
before the voltage selector
setting is changed.
AG-7500 can be used on
either 110, 120, 220, or 240V
AC.
AG-7500-E is preset to 220V
at the factory. AG-7500-A
and -B are preset to 240V at
the factory.
marked by the letter E or by the safety earth symbol
coloured GREEN or GREEN-AND-YELLOW.
The wire which is coloured BLUE must be connected to
the terminal which is marked with the letter N or
coloured black.
The wire which is coloured BROWN must be connected
coloured red.
Remark:
This apparatus was produced to BS 800: 1983.
Dieses Modell entspricht der EG-Vorschrift (fur Funkst6rungsschutz) 82/499/EG.
La Société PANASONIC-FRANCE, importateur du matériel MATSUSHITA-JAPON déclare que cet appareil est conforme aux
prescriptions de la directive 76/889/C.E.E. modifiée par la directive 82/499/C.E.E.
Dit model is onderworpen aan de EEG-richtijn (ter voorkoming van radio-interferentie) 82/499/EEG.
Denne model opfylder EF direktiv 82/499/EF (for forebyggelse af radiointeferens).
La Societa PANASONIC ITALIA S.p.A., importatrice di questo prodotto, dichiara che questo apparecchio @ conforme alle
disposizioni della direttiva C.E.E./82/499 (D.M. 10 aprila 1984).
WARNING: TO PREVENT FIRE OR SHOCK HAZARD
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
& is the safety information.
As the colours of the wires in the mains lead of this x
apparatus may not correspond with the coloured |*
markings identifying the terminals in your plug proceed |:
The wire which is coloured GREEN-AND-YELLOW o
must be connected to the terminal in the plug which is |%
or |
to the terminal which is marked with the letter L or |4

TABLE OF CONTENTS
|
Outline: 4.055 ate eet terete 3
Features. <25.. casio avacens (iad iaacaiee tweak plore 4
Features (Continued) .......................008 5
Controls and their Functions ................... 8
Basic
Operation
of
AG-7500................
14
Adjustment before Recording,
Playback and Editing .................. 16
Recording/Playback Using a
Video CAMCla tuo nsdn seca rdews 21
Editing
Using
the
AG-7500...............
22
Editing
Operation
(Assemble)
.................
23
Editing
Operation
(Insert)...................56
25
Editing
Operation
(Continued)
................
27
Connecting the Unit to a
Time
Base
Corrector..................0065
29
Connecting
the
Unit
to
a
Time Code Generator and Reader ...... 30
Connecting the Cables......................65. 30
Connecting
the
Cables
(Continued)..........
31
Using
Remote
Search
Controller
(Option)...
32
Editing
Using
Editing
Controller
(Option)
...33
Precaution
for
Handling
Unit..................
34
Conditions
Which
Are
Apt
to
Be
Mistaken
for
a
Malfunction
......................
0s
35
Video
Head
Clogging
....................ee
eee
85
Auto
OFF
LAMP
s.cn22e
ccc
oshtodeeaidiesveces
36
A
Word
about
the
Cassette
....................
36
Rack
Mount
Adaptor
(Option)..............
of
SPSCiCAtIONS
esis
aiaidxinsaasrdecenreeeviales
38
INSPECTION
>
Standard Accessory
®
S-VIDEO
Cable
(4P)
(VJA0510)
Optional Accessories
®
S-VIDEO
Cable
(4P)
(AG-C71A...5m)
(AG-C70A.
..3m)
®
Dubbing
Cable
(7P)
(AG-C65)
®
Editing
Controller
(AG-A750/AG-A650/NV-A500/
NV-A960)
®
Remote
Search
Controller
(NV-A505)
©
Remote
Controller
(AG-A600)
®
Rack
Mount
Adaptor
(AG-M750)
OUTLINE
The model AG-7500 Editing Video Cassette Recorder has
been developed for industrial applications, as well as for
schools and studios.
By the use of the S-VHS system, a sharp picture with high
resolution is obtained. Advanced editing and easy operation is
realized by the introduction of high reliability mechanisms
including the two-reel motor drive system, DD cylinder, and DD
capstan.
By connecting the AG-A750 Editing Controller to the AG-7500,
you can fully utilize the editing functions of the AG-7500 and
perform more accurate editing by automatic operation. You
can also create an editing system by connecting the unit to the
AG-A650, NV-A500 or NV-A960 Editing Controller.

FEATURES >
1. Amorphous heads and high quality picture
Picture quality has been improved by the use of the S-VHS
system and the amorphous heads. Resolution of over 400
lines and less noise are realized in the following
conditions.
eFM
carrier
frequency:
White
peak;
7
MHz
Sync tip; 5.4 MHz
einstallation
of
sub-emphasis
circuit
eWhite clip level: 210 %
eUse of S-VHS tape
2. Use of digital YC separator circuit
ePerfect YC separation is possible even in noncorrelating
portions.
Because of burst PLL system, non-standard signals can
be separated, too.
®As
digital
signals
are
process,
YC
can
be
separated
with
small
temperature
or
characteric
changes
by
a
stable
operation.
3. Time Code Editing
The unit allows the execution of time code editing when
this
unit
is
connected
to
the
AG-A750
Editing
Controller.
Synchronization is also possible at the Edit IN point by the
Capstan Override Connector.
4. High precision linear audio editing timing
When
insert
or
assemble
editing,
itis
possible
to
edit
at
the
linear
audio
editing
timing
of
+1
frame
with
respect
to
the
video
recording
timing.
(When
using
AG-A750.)
5. Automatic back space function
By the automatic back space function, video and audio
data without blank portions can be recorded by splicing.
6. H-aligned framing servo
Sometimes, when editing video signals conforming to the
CCIR
standard,
frame
phase
misalignment
or
horizontal distortion occurs between adjacent edited
portions. This unit employs a framing servo to align the
frames, thus eliminating such errors at the edit start and
end points.
7. Flying erase-based editing
The adoption of a “rotary erase head” makes it possible to
achieve top-grade electronic editing without noise or
frame mis-synchronization.
8. Dual audio channel-Dolby* NR system
Because there are two normal audio tracks, stereo or
bilingual programmes can be recorded and played back.
The sound quality is further improved due to the built-in
Dolby NR system.
* ‘Dolby’ and the double-D symbol are trademarks of Dolby Laboratories
Licensing Corporation.
* Noise reduction manufactured under license from Dolby Laboratories
Licensing Corporation.
9. Recording and playback of Hi-Fi sound
(HD sound) and assemble editing
You can record and play back HD Sound even without a
video input signal. You can also independently record a
total of four channels, that is, HD Sound (CH1/CH2) and
Normal Audio CH1/CH2.
10. JOG/SHUTTLE search function using dial
A programme segment on the tape can be rapidly and
accurately found by using the SHUTTLE search in which
the tape speed is varied between 0 and 10 times the normal
speed, or the JOG search in which the tape speed is varied
in accordance with the rotational speed of the dial.
11. Field still function
This function provides attractive still pictures with minimal
jitter.
12. Rack mounting possible due to front
loading
The unit is a cassette tape insertion type employing front
loading, hence it can be easily installed in an IEC standard
19-inch rack.
13. Editing and dubbing connectors
Special connectors designed for dubbing provide
improved picture quality when dubbing or editing
between video recorders.
14. Time code recording and playback
The EBU time code can be recorded and played back on
the audio CH2 track.
15. Independent editing
When the AG-7500 is used independently as an editor
and the edit start and end points are memorized in the tape
counter, editing automatically takes place between those
points.
16. System editing
An editing system can be configured by connecting the
AG-7500 to an Editing Controller.
eUp to three source (playback) units can be connected
simultaneously by using a Remote Search Controller
(NV-A505, option).
eit is possible to configure a system by connecting the
unit to the AG-A750, AG-A650, NV-A500 or NV-A960
Editing Controller (options).

FEATURES
(CONTINUED)
.
|
The S-VHS System has been designed to meet the critical demands of the Video
a= Vi S Information Age. This system incorporates technologies that provide high resolution and
= excellent picture quality with the VHS Video system, which is solidly established the
world over for industrial and home use.
The combination of this system with the newly developed S-VHS video cassette has
enabled epoch-making progress in picture clarity and detail. The system produces a
horizontal resolution of no less than 400 lines.
You can not only make recordings and playbacks of high quality pictures by using a
video cassette with the rl el but also enjoy recording and playback as before
with a cassette bearing the IS) mark.
Interchangeability of Video Recorders and Cassettes
During recording
S-VHS tape sas on this unit Recorded tape
posi 2 nn
iF
o
=
2
t
é 2/38 a le =O
Select the S-VHS selector
for either ON (S-VHS [erste \
mode) or OFF (VHS Saas
mode).
Recorded on this unit
Conventional VHS
Tape for recording Recorded tape
system
a
The recording is made by
VHS system regardless of
the position of the switch.
During playback
Recorded tape cesuctt .
ea) fe ® Plays back by automatically recog-
S-VHS CEE CSRS nizing the system recorded in the
se)" EEE tape.
ey
Recorded tape video recorder
VHS
©
Playback
picture
of
tapes
record-
ed by S-VHS system cannot be
[es 5 seen:
[9° Oss etwas

Comparison between S-VHS and VHS
As compared with the conventional VHS system, the
performance is remarkably improved as follows.
@ Frequency shift: 3.8 MHz ~ 4.8 MHz to 5.4 MHz
~7 MHz
@ FMluminance bandwidth: Approx. 3.2 MHz to approx. 5.5
MHz
e Resolution: Approx. 240 lines to more than
400 lines
However, when the band is widened, the S/N becomes inferior
accordingly. To prevent this deterioration, in the S-VHS
system, the following measures are incorporated.
e@ The sub-emphasis circuit is introduced in the preliminary
stage of the conventional main emphasis circuit.
@ AnS-VHS tape made of newly developed magnetic material
is used exclusively for the S-VHS.
@ The use of the amorphous heads ensures high quality
pictures.
©@ VHS System
Colour
signal
© S-VHS System
Colour
signal
'
i1 2
I;
|
|
627kH2z
3
Approx.
S.SMHz
———1 Frequency
Resolution more
than approx. 400 lines
High Quality Picture
Incorporation of detail enhancer
During VHS mode a picture with fine details, such as ripples on
the surface of water ora womans long flowing hair, tends to be
reproduced flat. The detail enhancer circuit enhances the
high-frequency signals (more than 1.5 MHz) of such pictures
before they are recorded, thus enabling every detail to be
reproduced clearly (4 dB up).
HD (high-dynamic) System
This unit records audio using the following two formats:
@ Hi-Fi sound: An FM format employing a dedicated
rotary audio head permits high quality
sound recording and reproduction.
This is the same format as that used ina
conventional video recorder.
® Normal audio:
<Compatibility with conventional recording methods>
This unit can record tapes in the conventional (normal) mode,
enabling tapes recorded on it to be reproduced on a
conventional machine.
The unit can also reproduce tapes recorded on a conventional
machine.
@ Independent dedicated audio head installed
on rotary cylinder
The audio of a video tape which was formerly recorded
using a fixed head is recorded on this unit using an audio
head mounted on a rotary cylinder. The video is recorded
over the audio using a dedicated video head. This
completely new format (Figs. 1 and 2) is called a high-
dynamic system (for creating superior sound quality).
Search head (R”)
Rotary erase head
Video recording/
playback head (L)
(Amorphous head)
Dedicated rotary
audio head (R)
Rotary erase head
Dedicated rotary
audio head (L)
Video recording/-
playback head (R)
(Amorphous head)
Search head (R’)
<Rear view>

@
Use
of
newly
developed
audio
processing
IC
A
newly
developed
Hi-Fi
sound
IC
processes
the
audio
input
signals
at
the
optimum
level
without
deterioration.
As
a
result,
the
dynamic
range
has
been
increased
from
the
conventional
value
of
80
dB
to
90
dB,
making
for
impressive
dynamic
sound.
©
Deep
layer
audio
recording
which
does
not
interfere with the video signal
The
dedicated
audio
heads
record
a
wide
frequency
band
FM
signal
on
a
deep
layer
of
the
tape.
The
video
signal
is
recorded
over
the
audio
signal
using
a
completely
different
azimuth
angle
for
the
video
head.
As
a
result,
even
though
the
recording
position
is
the
same,
the
audio
and
video
signals
are
recorded
clearly
and
without
mutual
interference.
(Figs.
2
and
3)
©
Deep
layer
recording
as
seen
on
the
cross-section
of
the
tape
Dedicated
—— audio head
Dedicated video
recording head
Base film
Audio signal
(recorded on deep layer of tape)
Video signal
(recorded
on
surface
layer
of
tape)
©
Track
pattern
of
deep-layer
recording
(outline)
Normal audio track
CH2
ae — CH1
MMMM
VICHUASUUUUIGUGAUEONLUTGSERHAEUHUDOUUUUUTUUEUUUO
eve
UU
Video track
+
Hi-Fi sound
track
@
Incorporation
of
switching
noise
reduction
circuit
An
electronic
switching
circuit
and
an
active
filter
have
been
incorporated
in
the
noise
reduction
section
which
is
the
heart
of
the
audio
circuit.
Also
audio
capacitors
and
low-noise
resistors
are
used
in
the
level
sensor
section.
Asa
result,
noise
which
is
generated
when
the
audio
head
(Hi-Fi
head)
is
switched
has
been
greatly
reduced,
making
for
highly
linear,
pure,
clear
Hi-Fi
sound.
Audio Head Switched Timing
This unit Conventional system
<Switching noise>
Jog/Shuttle Search
@ Incorporates double DD reel motor
The tape runs smoothly in the forward and reverse
directions, and the mechanism has good response.
@ Variable speed playback by microprocessor
control
By using the shuttle dial, the playback speed can be varied
according to the angle of rotation of the dial, and by using
the jog dial, the playback speed can be varied according to
the direction and speed of rotation of the dial. This is
useful for frame alignment when searching for the editing
points.
Flying Erase (rotary erase) Head
This head is installed ahead of the recording head on the rotary
head cylinder. In other words, because only the track on which
the recording is to be made is erased by the erase head, there is
no noise or over-erasure, and clean simple recording and
insert editing can be done without any colour stripe beat being
produced.
Also, each rotating head is controlled by a microprocessor,
resulting in improved accuracy during editing.
Portion corresponding Portion corresponding
to beginning of recording to end of recording
— Tape travel direction| Signal has been
erased, hence blank
portion appears
Old recorded
portion
Newly recorded
portion
Erasing method
Newly recorded portion
Full erase using
fixed erase head
Colour strip
to overwriting of new
recording on old
—— Tape travel direction
Rotary erase head
Picture is joined cleanly
Flying erase due to
rotary head
Newly
recorded recorded
portion portion
Newly recorded portion

<_ CONTROLS AND THEIR FUNCTIONS
Upper Panel
4 5 6 mee @
-———— of] ere oo
be | coro
SI (pees
aes ol
j—__—_] |
16
acs]
Middle
Panel
ifs
ner
ee
Lower Panel
i) Audio (CH1) Level Meter
The meter indication can be switched between Normal/
HD by means of Audio Monitor Selector @.
Audio (CH2) Level Meter
The meter indication can be switched between Normal/
HD by means of Audio Monitor Selector @. If you set
Audio CH2 Selector @ (Rear Panel) to the “TIME CODE”
side, you cannot use normal audio CH2. In this case, if you
set Audio Monitor Selector @ to the “NORM” side, the
audio (CH2) level meter will indicate the existence of a
time code signal if present.
weds
Hormel
tcl
pauses
3] Video Level/Tracking Meter
When the unit-is in the playback mode, this meter
functions as a tracking meter. in other modes, it functions
as a video input level meter.
4] Cassette Holder
6 Eject Button
Press this button to remove the cassette tape.

eee
nS
@
®
HD REC Switch
ON:
HD
sound
and
normal
sound
are
recorded.
OFF:
Only
normal
sound
is
recorded.
HD REC IINPUT Selector
NORM:
—
Normal
input
signal
is
recorded
on
HD
track.
HD:
HD
input
signal
is
recorded
on
HD
track.
NOTCH Selector
Normally
use
the
selector
in
the
“OFF”
position.
Place
this
selector
to
“ON”,
when
playing
back
S-VHS
tapes
recorded
on
other
VTRs
or
when
chrominance
noise
appears
in
the
luminance
signal
(Y/C
signal
is
not
separated
completely).
eWhen
the
tapes
recorded
through
the
S-VIDEO
input
connector
or
recorded
on
the
AG-7500
are
played
back,
set
the
selector
to
the
“OFF”
position.
More
clear
picture
can
be
obtained.
Frame Servo Selector
OFF:
Recording
or
editing
input
signals
other
than
CCIR
standard
signals.
Set the selector to this position when
performing insert editing or assemble editing
onto a tape that has been recorded using a
VTR which does not have a frame servo
function.
When the selector is put in this position,
Frame Lock lamp @ will go out.
FRAME:
_
Recording
or
editing
CCIR
standard
signals.
When
the
frame
servo
is
applied,
Frame
Lock
lamp
@
will
light.
COLOUR:
Recording
or
editing
CCIR
PAL
COLOUR
signals.
When
the
colour
frame
servo
is
applied,
Frame
Lock
lamp
@
will
light.
Audio Limiter Switch
By
setting
this
switch
to
the
“ON”
position,
you
can
record
the
Normal
Audio
signal
without
distortion
even
if
the
audio
input
momentarily
exceeds
the
reference
level.
(Normal
Audio
recording
only)
Audio Mix Rec Selector
TO
CH1:
Normal
CH1
and
CH2
inputs
are
mixed
and
recorded
on
normal
CH1
audio
track.
OFF:
Normal
CH1
and
CH2
are
recorded
separately.
Audio Output Selector
NORM:
Normal
Audio
is
output
from
Audio
Output
Jacks
@.
HD:
If
HD
Sound
is
recorded,
HD
Sound
will
be
output.
If
HD
Sound
is
not
recorded
on
the
tape,
Normal
Audio
will
be
automatically
output
from
Audio
Output
Jacks
@.
Image Selector
NORM:
Normally
place
the
selector
in
this
position.
DETAIL:
More
clear
picture
will
be
obtained
than
“NORM”.
However,
the
S/N
becomes
inferior.
EDIT:
Place
the
selector
to
this
position
when
editing.
However,
the
S/N
of
both
source
and
editor
VTRs
becomes
inferior.
@® Sync Selector
This
selector
is
used
when
recording
or
playing
to
select
one
of
two
types
of
sync
signals
(normal
or
external).
(See
Page
18.)

DO000000
OD00"
CAPSTAM
OVERRIDE
eo a
-f-
@ Fan Motor
@
Auto
Back
Space
Selector
At
“ON”,
spliced
recording
with
out
blank
on
the
picture
can
be
done
in
REC
PAUSE
mode.
©
Controller
Select
When
using
an
optional
editing
controller
or
remote
controller,
set
this
selector
to
a
position
corresponding
to
the
controller
used.
©
Time
Code
Input
Jack
Connect
this
terminal
to
the
output
terminal
of
a
time
code
generator
when
you
wish
to
record
time
code
signals.
Set
the
Audio
CH2
Selector
@
to
“TIME
CODE”.
6
Video
Mode
Selector
Used
to
avoid
mistaken
operation
with
the
colour/black
&
white
automatic
selector
circuit.
B/W: The unit is forcibly set to black & white mode.
AUTO:
Distinguishes
automatically
between
Black
&
White
and
Colour
video
input
signals
or
playback
video
signals.
However,
depending
on
the
signal,
select either
“B/W”
or
“COLOUR?”
if
the
automatic
selector
circuit
does
not
operate
properly.
COLOUR:
The
unit
is
forcibly
set
to
colour
mode.
© Video Input Connector
Connect the video signal to be recorded, such as a video
camera, to this terminal.
@
Audio
CH2
Selector
When
recording
or
playing
back
a
time
code
signal,
set
this
switch
to
the
“TIME
CODE’
side.
When
the
selector
is
set
to
this
side,
you
cannot
use
CH2.
© Sync Input Connector
Connect this connector to a composite sync signal from
a reference sync signal generator when synchronizing
the unit with an external reference sync signal.
®To connect advance sync from TBC.
© Video Output Connector
Connect this toa TV Monitor, video recorder, or time base
corrector.
@ Edit Automatic Stop Selector
By putting this selector in the “ON” position, the VTR will
automatically stop in the event that a servo disturbance
occurs during editing.
@ DOC Output Connector
When it is connected, a dropout detection RF signal will be
output. Connect this to the DOC Input terminal of a time
base corrector.
@ Time Code Output Jack
Connect this jack to the input jack of a time code reader
and play back time code signals.
Set the Audio CH2 Selector @ to “TIME CODE”.
© Audio Monitor Output Jack
You can obtain the audio output selected by Audio
Monitor Selector @ from this terminal.
® Capstan Override Jack
Use this jack when connecting with the Editing Controller
AG-A800.
Connect this jack to the CAP OVERRIDE Jack of the
AG-A800 when synchronizing the capstan with the
recorder (or player) during editing.
© Remote Control Connector
When you wish to operate the unit from a remote location,
connect the optional Remote Search Controller NV-A505
to this Connector. Aiternatively, when you wishtoperform -
editing, connect an optional Editing Controller
(AG-A750, AG-A650, NV-A500 or NV-A960).
© Dubbing Input Connector
Using the optional 7P dubbing cable (AG-C65), connect
this to the Dubbing Output Connector of the source
(playback). Note that you cannot connect this to the
dubbing connector of a 3/4” VTR.

@
S-VIDEO
input
Connector
This
is
a
4P
input
connector
of
separated
brightness
signal
and
colour
signal.
@®
Normal
Audio
Input
Level
Selector
This
selector
can
be
set
to
—6
dBs,
0
dBs
and
+4
dBs
in
line
with
the
level
of
the
signals
supplied
to
the
Audio
Input
(CH1/CH2)
Jacks.
®
Audio
Input
(CH1/CH2)
Connectors
These
input
connectors
accept
signals
from
external
audio
equipment
such
as
a
tape
recorder,
record
player,
etc.
@
HD
Sound
Input
(CH1/CH2)
Connectors
These
input
connectors
are
intended
exclusively
for
recording
HD
Sound.
@
HD
Audio
Input
Level
Selector
This
selector
can
be
set
to
—6
dBs,
0
dBs
and
+4
dBs
in
line
with
the
level
of
the
signals
supplied
to
the
HD
Sound
Input
(CH1/CGH2)
Jacks.
@
Audio
Output
(CH1/CH2)
Connectors
Connect
these
connectors
to
audio
(stereo,
etc.)
equipment
using
audio
cable.
You
can
select
either
Normal
Audio
or
HD
Sound
using
the
Audio
Output
Selector
@
on
the
front
panel.
®
Audio
Output
Level
Selector
This
is
the
selector
for
audio
output
level
(—6
dBs,
0
dBs
or
+4
dBs).
@
HD
Sound
Output
(CH1/CH2)
Connectors
These
output
connectors
are
intended
exclusively
for
HD
Sound.
@
Dubbing
Output
Connector
Connect
this
to
the
Dubbing
Input
Connector
of
an
editor
using
the
optional
7P
dubbing
cable
(AG-C65).
You
cannot
connect
this
to
the
dubbing
connector
of
a
3/4”
VTR.
@
S-VIDEO
Output
Connector
This
is
a
4P
output
connector
of
separated
brightness
signal
and
colour
signal.
@
Ground
Terminal
lf
hum
occurs,
connect
this
terminal
to
the
ground
terminal
of
equipment
connected
to
the
unit.
@
VOLTAGE
Select
Switch
When
using
this
unit,
make
sure
that
the
available
voltage
is
selected
correctly,
before
connecting
the
power
cord
to
an
AC
outlet.
@® Power Cord

BASIC
OPERATION
OF
AG-7500
|
Panasonic vote care cane o POD,
took
1882 Ae
{cll ea aoe
@ Recording
Press the Record Button @ together
y, 7, ~ 7 : P
«
-«
-
with
the
Play
Button
@.
While
a a 2 iN recording is taking place, the lamp is
lit.
@ Playback
v—" Press the Play Button @. During
aa playback, the lamp is lit.
s a
@Normally,
set
the
Sync
Selector
to
“NORM”.
eDuring
playback,
if
an
input
video
signal
matches
the
playback
video
signal,
the
Frame
Lock
Lamp
will
light.
(Only
when
the
Frame
Servo
Selector
is
set
to
“ERAME”
or
“COLOUR".)
See
page
19.
@ Pause If you press the Pause/Still Button @
v 7 during recording or playback, the
« ~ tape travel will stop, and the lamp will
a oe light.
During
Playback
If
you
press
the
Pause/Still
Button
@
while
playback
is
taking
place,
the
tape
travel
will
stop,
and
a
still
picture
will
appear.
an
elf
you
wish
to
cancel
the
still
picture,
press
the
Pause/Still
Button
@
(or
Play
Button
@)
once
again.
The
tape
will
move
again,
and
the
playback
picture
will
appear.
To
perform
recording,
press
Record
Button
@
and
Play
Button
@
simultaneously.
The
still
mode
should
be
cancelled
and
the
unit
will
go
into
the
recording
mode.
ePause
will
be
released
after
5
minutes.
@
Automatic
Back
Space
Recording
AUTO
BACK
SPACE
—
Set
AUTO
BACK
SPACE
Selector
to
ort
BB)
O%
“ON
side
—_
Y—”" Set in PLAY/PAUSE mode, and
i ig push REC Button.
yr ~
. 4 Or,
«
»
ePush
PAUSE/STILL
Button
in
sak
REC/PLAY.
The
tape
is
rewound
about
3
or
5
seconds
in
the
REW
direction,
and
waits.
When
PAUSE/STILL
Button
is
pressed,
the
unit
plays
for
about
3
or
5
seconds,
and
recording
starts.
@ Search Operation
7 Press the Search Button @.
The lamp, Play Button Lamp and
Pause/Still Button Lamp will light,
indicating that the unit is in the
Search Mode.
®|f you press the Search Button once again (or Play Buttton
@) while a search is taking place, the lamp will go out, and
normal playback will be resumed.
@ Search Dial
Press the Search Button @ and the unit is placed in the
Search Mode. Then rotate the Search Dial @ and search for
the desired video. By rotating the dial clockwise, playback
will take place in the forward direction ([>lamp lights); by
rotating it counterclockwise, playback will take place in the
reverse direction (<diamp lights). By pressing the dial, the
Shuttle Mode or Jog Mode will be alternately activated each
time the dial is pressed. Also, alamp at the left of the dial will
light to indicate the activated mode.
eYou can activate the Direct Search Mode by simply
operating the dial, without any need to press the Search
Button. (This does not apply to video recording, however.)
For details, consult with the shop where you purchased
your unit.
Jog Mode
This mode is used when searching for the editing points in
frame units.
The dial has been pressed in slightly.
dial status
By turning the dial, you can vary the speed from a still
picture to 1/5th speed slow playback.
When you stop turning the dial, a still picture will be
obtained.
v
<J rev ewes [>
-4
SEARCH

Audio Monitoring
You can monitor audio using one of the following four
methods.
@ When using headphones
When using headphones, you can
adjust the volume using this control.
To reduce the audio level, move the
control to the left, and vice versa.
Headphone
Jack Headphone
Level
Control
Use headphones.
(1/4” phone jack)
elf you use high impedance
headphones, the audio level
may change.
®HD or Normal Sound can be selected as indicates below.
@
When
monitoring
audio
using
the
Audio
Monitor
Jack
The
audio
selected
by
the
Audio
Monitor
Selector
will
be
output.
® Select the monitoring audio using the
method @ or @.
@ Audio Monitor Selector
METER You Can listen to the audio source
CHI HD selected by two switches (@, @),
Mix using the Headphone Jack or Audio
cH2 NORM Monitor OUtput Jack.
AUDIO MONITOR
@ This switch is used to select the type of audio
(HD/Normal) to be monitored. The movement of the
pointer of each meter will also change when this switch
Headphone Jack
is operated.
Audio Monitor : : Audio CH1/CH2
Audio Monitor
Oulput ee
HD HD Sound level
NORM indication
HO Normal Audio Normal Audio
NORM
level
indication
@ This switch is used for selecting the audio output
signal source.
Audio Monitor Audio Monitor
Selector Output Jack
Headphone
Jack
will be audible
Right side:
The audio of CH2
will be audible
@ When monitoring audio using the Audio
Output (NORM/HD) Jacks (CH1/CH2)
When monitoring audio using the Audio Output Jacks on
the back of the unit, you can output the following audio
signals using the Audio Output Selector.
Audio Output Audio Output
Selector Jacks
e
When HD Sound is not recorded on the tape, only
Normal Audio will be output from the output terminals,
even if the selector is set to the “HD” side. Also, at this
time, the HD lamp will be out.
@ When HD Sound is recorded on the tape, the HD lamp
will light even if the selector is set to the “NORM” side.
@ When a tape recorded with HD Sound is played back
and the tracking control is not set for optimum tracking,
normal audio will be output even if the selector is set to
the “HD” side. In this case, the HD lamp will be out.
Normal
Audio
© When using HD Sound Output Jacks
When playing back an HD Sound recorded tape, HD
Sound will be obtained from these jacks.
But when only normal sound is recorded on the tape, no
HD Sound will be obtained from these jacks.
Video Level Adjustment
@ Set the Input Signal Selector according to
the equipment connected to the unit.
To ensure a coloured picture with minimal jitter when
dubbing, set the switch to the position which matches
the particular application.
connected to the 4P S-VIDEO Input Connector,
se To record video signals from a video source
set the Input Selector to the “S-VIDEO” position.
connected to the Video Input Connector, set the
To record video signals from a video source
LINE
Input Selector to the “LINE” position.
connected to the Dubbing Input Connector, set
a record video signals from a video source
DUB |@) the Input Selector to the “DUB” position.

Position of
Input Signal
Selector Video Dubbing
Input Input
Connector Connector
4P S-VIDEO
Connector
sweco | o | x |
rare = Se
©...Normal
X...Abnormal (cannot be used)
@ Dubbing
Source Unit
To
edit
the
tape
by
using
S-VIDEO
Output
Connector,
Dubbing
Output
Connector
or
Line
Output
Connector,
set
the
image
Selector
to
“EDIT”.
A
clear
picture
can
be obtained.
Editor Unit
To edit the tape by using S-VIDEO Input Connector, Dubbing
Input Connector or Line Input Connector, set the Image
Selector to “EDIT”.
© Image Selector at “EDIT”
Operating . Picture Noise
Circuit E Peet Quality | Cancel
nhancer oe
VTR Mode Control VR] Circuit
VHS
Recording
? Amount
f on a of work
VHS Variable Action |decreased| Action
Reproducing at at “OFF”. |at “ON”. | at “OFF”.
“OFF” Action at
‘ “OFF”.
S-VHS
Recording
. Amount
ae - of work
S-VHS Variable decreased
Reproducing at at “ON”.
“OFF” Action at
: “OFF”.
®tn
reproducing
mode,
LINE
OUT,
S-VIDEO
OUT
are
shown.
eAfter
dubbing,
put
the
Image
Selector
to
“NORMAL”.
e When using at Image Selector “EDIT”
Ss When recording VTR signal or signal with
Recorder VH low S/N
Unit
exis —————
Player VHS_ | When recording by other VTR
Unit S-VHS_| When recording by other VTR
® When using at Image Selector “NORMAL”
VHS Camera with high S/N with no high range
Recorder correction, etc.
Unit
Player VHS | When sending out TV monitor, etc.
Unit S-VHS_ | When sending out TV monitor, etc.
@ Set the Sync Selector to one of the two
sync signal positions (normal, external).
= x If sync cannot be obtained, the
picture on the TV monitor will be as
shown at left. Set the Sync Selector
in accordance with the particular
application.
Pe en es
The sync signals are switched as shown in the table
below.
@When Sync Selector is set to “NORM”
Video Signal
Recording
Not
synchronized *1
Playback Internally
Synchronized
*1 When only the HD Sound is being recorded, the unit will be
synchronized with the internal signal.
Synchronized
with video
signal
When Sync Selector is set to “EXT”
External Signal
No video
present
Video signal
present
Application
Recording
Synchronized
Not
synchro-
with
external
nized
Playback
signal
@When recording or playing back of HD Sound
Input Signal
External Signal
Video signal
present
No video
Application present
Recording or
playback of HD
Sound
Synchronized
with external
signal
Synchronized
with video/
internal*2 signal
*2 When a video signal exists, the unit will be synchronized
with the video signal. When a video signal does not exist, it
is synchronized with the internal signal.
<Caution>
If you operate this switch during recording or playback,
the reproduced picture will be disturbed. Do not,
therefore, touch this switch.

© Set the Frame Servo Selector
The Frame Lock Lamp will vary depending upon the
position of the Frame Servo Selector, as shown below.
| Frame Servo Selector
orF [_@_] COLOUR
FRAME
If the input signal is met with the CCIR standard.
ofr [__@] COLOUR
a 37E light
If the input signal is met with the CCIR standard PAL
COLOUR.
When the VTR is used as a source VTR during editing.
oFF [| COLOUR
FRAME
C_]
gooff
If the input signal is not met with the CCIR standard. (A
rondom interlaced video camera, etc.)
Frame Lock Lamp
=F light
When the tape not recorded on this unit or the AG-7450
portable recorder is used, framing may not be matched.
Be sure that the camera output signal is also met with the
CCIR standard PAL COLOUR.
Switch
settings
and
lamps
used
to
perform
colour
framing
editing
© pus editing
To perform editing using the dubbing (7-pin) cable,
connect the respective units as shown below.
DUB DUB
OUT IN
Editor
AG-7500
Source
AG-7500
Frame Servo Input SW — DUB
SW — OFF Frame Servo
SW — COLOUR
Editing
Controller
AG-A750
Preroll SW — 7 SEC
<Caution>
eSet the preroll time of the AG-A750 editing
controller to “7 SEC”.
eUse colour framed tapes in both the source and
_ editor units. (e.g. tapes recorded using AG-7450 or
7500)
© LINE editing
To perform editing using the BNC cable, connect the
respective units as shown below.
VIDEO VIDEO
OUT IN
Frame Servo Input SW — DUB
SW —- OFF Frame Servo
SW ~ COLOUR
Editing
Controller
AG-A750
Preroll SW > 7 SEC
<Caution>
eSet the preroll time of the AG-A750 editing
controller to “7 SEC”.
eUse a colour framed tape in the editor unit. (e.g. a
tape recorded using AG-7450 or 7500)
eUse a colour programme tape in the source unit.
This tape need not be colour framed.
Notes for Colour Framing
e@ When reviewing to check the Frame Editing after editing,
the source unit is in the pause mode and the editor changes
over to the internal synchronisation condition.
Therefore, the Frame Lock Lamp is off the whole time.
Please check the colour framing at the Editing-In and -Out
points in the review mode on the screen of the monitor.
The following are remarks on the Colour Framing Editing,
however, they do not matter in the ordinary editing system.
Editing via Video Input Connector
1) The input video signal should be a CCIR standard PAL
colour signal.
2) Set the preroll time of the Controller AG-A750 to 7
seconds.
3) The tape in the editor should be recorded by colour
framing the CCIR standard PAL colour signal.
4) Both tapes in the source and the editor should have
continuity of the colour rotation in all editing sections.
(There should not be any assemble or insert editing.)
Editing via Dubbing Input Connector
1) All remarks mentioned in “Editing via Video Input
Connector” apply here as well.
2) Furthermore, it is necessary that the tape in the source
unit is also well colour framed.
How to check whether colour framing was performed on a
tape or not
1) Insert the tape that you want to check into the AG-7500
and set the Frame Servo Switch to “COLOUR”.
2) Input the standard CCIR PAL signal via the Video Input
Connector and playback the tape.
3) If the Frame Lock Lamp lights up, the recording on the
tape is colour framed.

©
Adjust
the
video
level.
For a normal picture, push in the Video Level Selector
(AGC).
VIDEOLEVEL When the switch is set to this position
<2. (pushed in), the recording level of
es : the video will be automatically
. ‘
adjusted.
At
this
time,
the
Video
Level
ete
Control
will
not
function.
Push
VIDEOLEVEL
When
using
the
switch
in
this
e%e
position
(pulled
out),
adjust
the
be ° Video Level controi so that the
pointer of the level meter indicates a
. suitable level (center of the blue
Pull line).
VIDEOLEVEL TRACKING
e e e e FIX e
e e e e
©) :O:
e e e e
e . e °
@
Adjust
the
tracking.
Normally,
set
this
control
to
the
click
stop
at
the
center
when
playing
back
a
tape.
Seetiiti
_
When playing back a tape which was
recorded on another video recorder,
noise may appear on the TV monitor
In such acase, perform the following
# adjustment.
1)
While
playing
a
pre-recorded
tape,
slowly
turn
the
Tracking
Control
left
and
right
until
the
deflection
of
the
pointer
of
the
tracking
meter
becomes
maximum
(moves
to
the
right).
VIDEOLEVEL TRACKING
° a FIR
2) Leave the control in that position and continue to
watch the picture.
3) Upon completion of playback, always return the
Tracking Control to the center click stop.

RECORDING/PLAYBACK
USING
A
VIDEO
CAMERA
Video Input
Connector
Camera Cable
0000000
in
» ia ———
TV Monitor
Audio Cable
Tape Recorder
<Caution>
©The
Mic
jacks
are
on
the
bottom
row
on
the
front
panel.
®Do
not
connect
both
the
microphone
and
audio
(line)
inputs
to
the
video
recorder
at
the
same
time.
If
you
do
this,
only
the
output
from
the
microphones
will
be
recorded.
Switch Setting
Set the Sync Selector to “NORM”.
_
©
Set the Control Selector to “LOCAL”.
o
Set
the
Input
Signal
Selector
to
“LINE”.
(See
page
17.)
>
Set the Memory Switch to “OFF”.
n
Set the Audio CH2 Selector to “NORM AUDIO CH2”.
odd
Turn “ON” the Power Switch.
AUDIO CH2 SELECT
NORM
TIME CODE
“oe 7 MEMORY
Rear ON
Panel t
ROLLER SELECT VIOEOMODE AUDIO CAI/SELECT
2 AUTO
co.oun M0 | | we cone
3 ow 4
TIME CODE
VIDEOIN = SYNC IN
Power Switch * “ws 5 ig i
LOCAL
INPUT CONTROL
norm [@__] ext
SYNC
When you wish to record HD Sound as well, set the HD
Recording Selector (Front panel @) to “ON”.
HD REC
oFF[ JON
=
Power Cord
To AC Outlet
Microphones
Operating Procedure
1. Turn “ON” the TV monitor.
2. Load a cassette tape.
3. Adjust the video camera.
4. Adjust the video level. (See page 20.)
¢For automatic operation, push the Video Level Selector for
“AGC”.
5. Adjust the Audio CH1 and CH2 Levels. (See page 16.)
®By setting the Audio Limiter Selector to “ON”, the audio
limiter will be activated.
This is useful for controlling the amplitude of input peaks
from a microphone input.
6. For details of recording, playback, etc., see “Basic
Operation of AG-7500” (Page 14~15).
Aaa |
LIMITER
—-
eWhen you wish to record HD Sound as well
1) Set the HD Recording Selector (Front pane! @) to “ON”.
2) Set the Audio Monitor Selector (METER side) to “HD”,
3) Adjust HD Sound level CH1 and CH2.
When the input level from Audio Input Jacks is +4, 0 or —6
dBs, by setting the Audio Level Control to the center click
point, you can perform recording at the optimum level (0
VU). (See page 16.)

EDITING USING THE AG-7500
iNicewe
f mb
ee
Video Camera
Camera Cable
TV Monitor
o0 00000
wnuoaege
YqggON
et
Audio
Input
Audio
to
Bupa
ae
ae
CH1/CH2
CH1/CH2
Jacks
Jacks
Front
View
MIC
CH1/CH2
Jack
coOy [@) O° 9
Microphones
ooOr1y
lho
<Caution>
:
©The
Mic
jacks
are
at
the
bottom
row
on
the
front
panel.
Audio
Cable
®Do
not
connect
both
the
microphone
and
audio
(line)
inputs
Audio
Cable
to the video recorder at the same time. If you do this, only the
output from the microphones will be recorded.
MEMORY
ON
1.
Set
the
Sync
Selector
to
“NORM”.
Ml
A
2. Set the Control Selector to “LOCAL”.
3. When connecting above, set the Input Signal! Selector to
“LINE”.
When using the S-VIDEO Input Connector, set the selector
to “S-VIDEO” and when DUB Input Connector, set to
“DUB” according to input mode. (See page 17.)
adasa
=|
68) (3a ae
4. Set the Memory Switch to “OFF”.
5. Turn “ON” the Power Switch.
Power
Switch
SMDEO
—)
REMOTE
ous
LOCAL
INPUT
CONTROL
When you wish to record HD Sound as well, set the HD
Recording
Selector
to
“ON”.
SYNC
HD REC
OFF[__BJON
—__>
For details of the operating procedure, read Pages 23~28.

@ Assemble editing
“Assemble
editing”
permits
the
user
to
add
programme
material
to
the
end
of
a
previously
recorded
portion,
thus
making
one
continuous,
uninterrupted
program
from
many
segments.
Video/HD
Sound
(CH1/CH2)
and
Normal
Audio
CH1
and
CH2
are
all
edited
at
the
same
time.
As
shown
in
the
illustration,
suppose
that
part
EJ
had
been
previously
recorded.
To
this,
a
new
portion
—
is
added.
This
results
in
a
new
programme
consisting
of
BJ
and
Ef.
eYou
can
set
the
HD
Sound
to
ON
or
OFF
by
using
the
HD
Recording
Switch.
Direction of tape movement
HO 8 ME BNE BOE Sb OR
Normal Audio CH2 track
Normal Audio CH1 track
Video/HD Sound track
Control track
Normal Audio CH2 track
Normal Audio CH1 track
<=
v
End point for assemble editing
Beginning point for assemble editing
Normal Audio CH2 track
Normal Audio CH1 track
Video/HD Sound track
Video/HD Sound track
Control track
— LUG).
Pre-Operation Checks
els
the
cassette
record
tab
broken?
If
the
tab
is
broken,
editing
will
not
take
place.
Were
preparations
and
connections
completed
prior
to
editing?
(See
page
16~22.)
®\s
the
Control
Selector
set
to
“LOCAL”?
tel
eEnsure
that
the
Frame
Lock
lamp
lights
under
the
following
conditions.
1)
Play
back
the
tape
on
which
you
wish
to
perform
editing.
2)
Turn
the
Tracking
Control
on
the
source
until
the
indication
on
the
Tracking
Meter
becomes
maximum.
3)
Set
the
Tracking
Control
on
the
editor
to
the
click
stop
at
the
center.
4)
Set
the
Frame
Servo
Selector
on
the
editor
to
“COLOUR”.
‘ontro! track
(a
0
00
8.6
5
8@)=>
FRAME LOCK
ico: <—pal opoya
<Caution> oa /
When the Frame Lock
Lamp is out, the edit points
may sometimes be dis-
turbed.
Operating Procedure
1. Press the Power Switch “ON”.
2. Load the cassette tape.
3. Check the programme to be edited using a TV monitor.
Press the Play Button. The signals already recorded on the
tape will be played back. By pressing the Record Button
while playback is taking place, you can observe the E-E
signals which you are trying to record. This will take place
for as long as the button is kept pressed. These signals will
not be recorded on the tape, however.
4. Verify that the Play Lamp or both the Play Lamp and the
Pause/Still Lamp are tit.
Press “ON” the Assemble Button.
©The button is a self-illuminating type. When it is pressed, it
will light; by pressing it again, it will go out.
pause $m
. icsiaicl ]] Ey
“light
ee eee
ial let:
If you attempt to start editing by pressing the Edit Start
Button without selecting the editing mode, the four
Editing Mode Select Buttons will flash six times,
reminding you to select the desired editing mode. After
selecting the mode, press the Edit Start Button.
*®After selecting the editing mode, the in and Out Buttons
will flash.
£01T POINT
iN SET Out
oo aG
e 4 . 4
flash
5. Press the Search Button, then using the Search Dial search
for the edit In point. Once the In point is found, put the unit
in the still mode. (See page 14~15.)
<Caution>
Press the Reset Button on the Tape Counter to reset the
counter to “0:00:00:00". When the counter is reset, the
previously set edit start and end points will be erased.
MEMORY
ON
RESET
OFF
<
EDITING
OPERATION
(ASSEMBLE)

ee
6. Press the In and Set Buttons simultaneously to set the edit
start point. When these buttons are pressed, the In Button
will tight to indicate that the edit start point has been set.
®At this time, the Edit Start Button will flash.
VIDEO
HO
CH
-.
oo
cH?
EDIT
POINT
.
4
joo
o
__
GG)
Al
Err
START
€oIT
STOP
Tt
a
flash
?
flash
v
7. Using the Search Dial once again, search for the edit end
point, and when the unit is in a pause status, press the Out
and Set buttons simultaneously to set the edit end point.
The Out button will immediately tight to indicate that the
edit end point has been set.
a Cast
VIDEO
HO
CH1-AUDIO.
CH?
€0IT
POINT
SD
io
ie
START
iim
stor
‘G-
‘a a
flash
8. Press the Edit Start Button to start editing.
VIDEO HO CH1-AUDIO- CH2
IN ser our
a7 cA v @
€orr
START
€oit
stOP
=
(C-
LJ
-C-
“ a”
| a
if [Oo] ~
flash *
If you wish to perform editing without registering the edit
start point or edit end point, see “Registering Edit Points” on
page 27.
EOIT POINT
<Caution>
®When performing assemble editing, itis necessary that
the tape be pre-recorded for at least 3 seconds ahead of
the edit start point.
You cannot perform assemble editing starting from
a blank section of tape.
elf there is a portion of the original programme
remaining on the tape at the end point of assemble
editing, the transition back to the previously recorded
programme will not be smooth during subsequent
playback.
When using a tape to which frame servo is not applied
as the source, register the editing start and end points
in order to prevent simple recording points from
appearing over the editing width, including the pre-roll
width.
before about
3 sec. ot
Editing Procedure
a
-
oo"
. after about
edit end point 2 sec.
et
edit start point
‘~a———— editing
ro)
)
’
'
‘
'
'
'
3)
— A] point: Press the Edit Start Button to Start Editing —
eThe Edit Start Button flashes rapidly.
¢ fous’) While this lamp is flashing, the VTR pre-rolls
‘ol *) back from the edit start point for 3 seconds, and
e e after performing playback for about 3 seconds
will reach the edit start point.
rapid flash
—@ point: Edit Start Point
®The Edit Start Button lights.
wr stast ¢ =Thelamplights at the edit start point. At this time,
the video and audio signals which are to be
edited and recorded will appear on the TV monitor.
ry 4
light
—@ point: Pause after recording for about two seconds
past the edit end point.
Once again, the Edit Start Button flashes rapidly.
a Fourstar’ . ~The video and audio being edited disappear, and
the tape returns to the adjacent edit end point.
it Nn
s 4
rapid flash
—@O point: Edit Ead — @ — ———_______-
eThe Edit Start Button goes out, and both the In and Out
Buttons flash slowly.
EOIT POINT
EDIT START
IN SET OUT
(O)
Goug
¥ 7] x 4
go out ae
flash
The registration of both the edit start point and
the edit end point is cleared, and the tape
remains still at the edit end point.