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Tel:
+44 (0)118 933 2533 Fax: +44
(0)118 933 1224 email:
sales@teelectronics.co.uk |
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THE JACKDAW, THE DEVIL’S HIGHWAY |
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MORTIMER
WEST END, READING, BERKS RG7 2AD, UK |
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TE3203
LOCAL/REMOTE VGA SELECTOR
A compact, mains
powered
stand alone VGA selector designed to allow the local user’s monitor to
display
either the local PC signal or a signal from a remote PC. This
capability is
often useful in TRAINING suites. The bandwidth is suitable for use up
to XGA resolution.
Audio follows
the selected
video and control of the source is by a choice of several remote and
local
contact closure protocols. The local user has a push button over-ride
and LED
status indicators. The local control and LED indicators can be
duplicated on a
separate panel by using the front panel “Local Control” connector.
Local signals
use standard
VGA and audio cables while the remote signals use RGBHV coaxes and BNC
connectors plus balanced audio. The balanced audio and remote control
signals
are input to a 0.2” two part screw terminal connector. The RGBHV coax
inputs
have isolated grounds to avoid earth loop problems.
There is a
priority option
that causes the TE3203 to switch to REMOTE whenever the remote signal
is
present.
The
default/power-up state
is “Local”.
Power
requirement:
230V ac, 6VA. (115V version available
on request.)
RGB
bandwidth/Impedance:
dc to 200MHz/75W
Overall
dimensions:
135mm wide x 54mm high
x 150mm deep
The ABS case has
provision
for fixing to a mounting surface or can be free standing.
REMOTE CONNECTIONS
All remote inputs connect to the rear
panel (right
hand picture above).
RGBHV
The
five remote “video” RGBHS signals are connected to isolated
BNC sockets with differential inputs. This avoids any problems due to
earth
loops. The input impedance is 75Ω. Internal PCB links allow the H and V
ports to be set as TTL inputs.
CONTROL AND AUDIO
The remote
control and audio
signals are input on a two part 8w 0.2” screw terminal connector. The
audio
inputs are balanced line level. The control inputs are contact closures
or TTL
signals, including an edge triggered switchover facility
with selectable edge polarity.
Connections,
numbered left
to right, are:
|
1 Common/0V |
5 Left Audio + |
|
2 Local/Remote, Edge triggered: Rising = Local; Falling =
Remote (see 3) |
6 Left Audio - |
|
3 !Invert pin 2 logic |
7 Right audio + |
|
4 Audio Screen |
8 Right audio - |
NB: In the logic
functions
above, a preceding ! denotes “Active
Low” , eg “!Local” = achieve the “Local” state with an input that is
low/0V/contact closure to 0V.
LOCAL CONNECTIONS
All local connections are made to the
front panel
(left hand picture above).
MAINS INPUT
The 230V 50Hz
supply is
input via a three terminal IEC connector. An earth is required. The
TE3203 is
supplied with 2m IEC to BS1363 lead (other lead and voltage options
available).
LOCAL INPUT
The local PC
video and audio
are input to a standard VGA 15w high density “D” socket and 3.5mm
stereo jack
socket respectively.
A standard male
to male VGA
cable will connect to the PC monitor socket.
A male to male
stereo 3.5mm
jack plug audio cable will connect to the PC audio output.
The TE3203 is
supplied with
2m leads as standard. Other lengths/types can be supplied on request.
LOCAL OUTPUT
The local PC
video and audio
are output on a standard VGA 15w high density “D” socket and 3.5mm
stereo jack
socket respectively, simulating the standard PC connectors.
No leads are
supplied as
these are normally part of the target equipment.
LOCAL
CONTROL/STATUS
Local control
signals and
status outputs are connected via the two part 3.5mm 2 row 8w spring
clamp
connector.
Connections,
numbered left
to right, bottom row first, are:
|
1 Control Common/0V |
5 Indicator LED common/0V |
|
2 !Local |
6 Drive for ext “LOCAL” LED indicator* |
|
3 !Remote |
7 Drive for ext “REMOTE” LED indicator* |
|
4 !Toggle Loc/Rem (≡ panel push button) |
8 !Remote Priority** |
NB: In the logic
functions
above, a preceding ! denotes “Active
Low” , eg “!Local” = achieve the “Local” state with an input that is
low/0V/contact closure to 0V.
NOTE: Logic inputs 2, 3
and 4 are momentary (approx
0.25s or more). Holding inputs 2 or 3 low will prevent other input
commands
from having any effect. Holding input 3 low will prevent the front
panel push
button from having any effect.
* 1k from +5V giving typ
3mA drive to a LED (use high
efficiency LEDs).
** Grounding this pin
will automatically cause “REMOTE” to
be selected whenever a sync signal is detected on the Remote “H” input.
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