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LDH2545/10
Instructions For Use Manual
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Philips LDH2545/10 leaflet

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Philips Communication & Security Systems
Data Sheet
Real Time Video
Multiplex er
Introduction
the picture quality is maintained to the highest standards.
The units are particularly useful where space is at a premium or where 4 pictures are to be transmitted to a slave monitor when only one video channel is available. This keeps installation costs to a minimum. In addition, the multiplexer enables simultaneous display of the four camera inputs.
RTVM
The picture shown will follow the video input 1 format. Available selection of the picture display is:
LDH 2554/00
n Standard inputs and outputs n Colour or monochrome display
handling
n Full digital video technology n PAL and NTSC compatible n High quality pictures in all
modes
n Simultaneous display of all four
inputs
n Quad, sequence, single, VCR
play-back and freeze mode displays
n Video loss and input alarm
warning
n Easy on screen display set-up
n Table top or 19” rack mounting
n No need for cameras to be
synchronised
n Quad mode: Where all four video
inputs are simultaneously displayed on the monitor, each in a quadrant of the output picture.
n Sequence mode: The video inputs are
sequentially displayed on the monitor as full screen pictures for the pre-set dwell time.
n Single mode: One manually selected
video input is displayed on the monitor or when an alarm is generated.
n VCR mode: An output is available
providing a video signal for recording on a VCR. This video signal contains all input signals (in a quad picture) and encoded digital on-screen-text data. This special play-back mode can reproduce the signal either in quad or full sized pictures.
n Freeze mode: It is possible to freeze
pictures on alarm, video loss or by manual command.
Multiplexer Inputs
The unit is designed to accept all standard CCTV cameras, monochrome or colour and including models fitted with picture enhancement and any video recorder to display recorded pictures.
A user definable identification text can also be displayed with the associated picture. If a camera signal fails, a “VIDEO LOSS” alarm is generated and displayed on the screen with the last image saved in the quad picture or full screen, if the camera picture was selected at the time of failure.
Four alarm inputs can be connected to generate alarm text and display the associated picture full screen.
Multiplexer Output
The video output is connected to the monitor to display single, quad or sequential pictures. An output is available providing a video signal for recording on a VCR.
An alarm output allows control for external alarm generation or control of a VCR.
Alarm Handling
When an input alarm signal is generated, the associated video input will be displayed full screen on the monitor. At the same time an “ALARM” text is displayed next to the camera identification text on the monitor screen. The unit alarm output contacts will be activated. The alarm will remain active for at least the programmed display time, or while the external HOLD input is activated.
Should a subsequent alarm be generated in the presence of the first alarm, the unit will cycle through the associated video input signals at the programmed dwell time, provided that the first alarm is not frozen.
Video Loss Alarm
The unit features a video loss alarm. If this feature has been enabled on your multiplexer (during set-up) and the video signal from any input is lost:-
n When in the quad or in the single
picture mode, the last image before the loss will be frozen in the picture. In full screen sequence display, a black level will be displayed for one second to draw attention. The same screen will be visible if an input with video loss is selected after the loss has occurred.
n If the input loss is still current after one
second, the alarm output relay is energised for four seconds and the message “VIDEO LOSS” will be displayed.
n If there is another input selected, the
video loss message will appear one line above the current camera identification text, and display “VIDEO LOSS 3”, (indicating that input 3 has a video loss).
n If there is no video input signal on
start-up, the monitor will display colour bars in place of the associated input.
On return of the video input signal, the warning will be automatically reset.
Set-up Mode
The set-up mode allows the installer to define the multiplexer parameters and display text to any customer requirement. At initial power-up the system will perform a self-test. The appropriate product information is displayed and the monitor displays in the quad mode.
To ensure that only authorised operators can enter the set-up mode a protection code can be defined during a previous set­up.
When the set-up mode is entered the options available to the operator are:
n SET IDENT TEXT - allows you to
define the identification text for each camera input. Up to 12 characters can be defined.
n SET GENERAL OPTIONS - allows
you to set the general system parameters. The system parameter options available are:
Date - Defines the required date as YY­MM-DD for display Time - Defines the required time for display. Alarm handling -ENABLED or DISABLED or HOLD. Defines whether the alarm function is active. Alarm hold time - 0 or defined time. Allows you to set the minimum time that the alarm picture is displayed, between 0 and 99 seconds. Alarm display -FLASHING or STEADY. Defines if the alarm messages will be displayed flashing or not. Video loss alarm - ON or OFF. Defines if an alarm output is generated on video loss. Protection code - OFF or defined code. Enables you to enter a four digit sequence code for entry into the set-up mode. If the protection code is changed from OFF, the protection screen will be displayed. Enter the required protection code, using any of the defined 8 keys. Once this is entered, the SET OPTIONS screen will be displayed, then the protection code option defined as ON. Language - English/ French/ German/ Italian/ Spanish/ Dutch. Allows you to define the set-up screen display in the selected language.
n SET INPUT OPTIONS allows you to
set the system input parameters. The system parameter options available are: Input type - CVBS or Y/C. Defines the video input type. Input impedance - 75Ω or HI-Z. Defines input impedance (active only if CVBS is selected). Freeze on alarm -ON or OFF. Defines picture freeze on an alarm input. Freeze on video loss - ON or OFF. Defines picture freeze on a video input loss. If selected ON, the last available picture is frozen. Dwell time - 0 (Off) - 99 sec. Defines the picture dwell time in (alarm) sequence mode.
n SAVE CHANGES saves your set-up
options.
n ABANDON CHANGES abandons
any changes made and returns the system to its previous set-up.
n FACTORY DEFAULTS pre-sets the
system to the factory default parameters.
TECHNICAL D ATA
Electrical
Power supply
Voltage : 12 Vd.c. + 10% Current : Max. 2.5A @ 12 Vd.c. Connector : 2.1 mm coaxial
Video inputs
Video system : PAL & NTSC (CCIR/EIA)
with automatic change-over
Connector type : One BNC for CVBS and
one Mini-DIN (S-video, Y/C) for
each input Number : 4 (Video inputs) + 1 (VTR) CVBS level : 1 Vpp 75Ω
or High Z Termination*
* (Not for VTR) Y/C level : 1 Vpp 75Ω / 0.29 Vpp 75Ω Signal requirement : 0.5 < Vin < 1.38 (Vpp) Signal to noise ratio : >40 dB
Monitor output
Video system : Auto-select PAL or NTSC Screen size : 768 x 576 pixels (PAL)
640 x 486 (NTSC) Connector type : One BNC (CVBS) and
one Mini-DIN (S-video, Y/C) CVBS level : 1 Vpp 75Ω Y/C level : 1 Vpp 75Ω / 0.29 Vpp 75Ω Signal to noise ratio : >40 dB
Video Recorder output
Video system : Auto-select PAL or NTSC Screen size : 768 x 576 pixels (PAL)
640 x 486 (NTSC) Connector type : One BNC (CVBS) and
one Mini-DIN (S-video, Y/C) CVBS level : 1 Vpp 75Ω Y/C level : 1 Vpp 75Ω / 0.29 Vpp 75Ω Signal to noise ratio : >40 dB Captioning data : Vertical blanking period contains
digital OSD data
Alarm inputs
Connector type : 25 Pin Sub-D type (Female) Source input : 5 Vd.c., 1KΩ Level : TTL level, Active High Pinning : Channel 1 Pin 21
Channel 2 Pin 22
Channel 3 Pin 23
Channel 4 Pin 24
Ground Pin 7 Alarm hold input : Active if the input pin 20 is
grounded
Alarm output
Relay : One set of contacts NO/NC
potential free
(1A @ 30 Vd.c., resistive only) Pinning via alarm connector
: Common Pin 17
NC Pin 18
NO Pin 19
Remote control
Input : Direct control inputs active when
grounded (preferably by contact
closure) Source : 5 Vd.c., 1kΩ (TTL level) Control Serial : RS232; 9600 baud; 8 bit no parity;
one stop bit
All commands use a 2 character code
preceded by a “/” character Connector : Via alarm connector Pinning : Transmit (TxD) pin 2
Receive (RxD) pin 3
Ground (GND) pin 7
Alarm/Remote cable : The alarm/remote connection cable
must be shielded
Mechanical
Dimension : 430 x 295 x 43.5 mm (W x D x H)
(Can be fitted into a 19” rack) Weight : 2.0 Kg Bump : (IEC 68-2-29 Eb)
1000 bumps, 10g 16 msec,
3 directions Vibration, endurance : (IEC 68-2-6 Fc)
10-55 Hz, 0.075 mm amplitude
Quality and Environmental Data
Quality assurance : ISO 9001 MTBF : > 100,000 Hours Safety : EN 60950
Climatical
Low temperature : (IEC 68-2-1 Ad) +5°C High temperature : (IEC 68-2-2 Bd) +40°C Temperature shock : (IEC 68-2-14 Na) <0.5 °C/min Air pressure : (IEC 68-2-11 M)
70 kPa to 110 kPa
Electro magnetic compatibility
In accordance with the EU EMC directive 89/EEC and marked with the “CE” symbol.
Control Pin Serial Command
Input 1 8 C1 Input 2 9 C2 Input 3 10 C3 Input 4 11 C4 Sequence 16 SQ Quad 13 QD VTR 12 VR Freeze 25 FZ Menu - MN
9498 962 28811 96-32 Data subject to change without notice
© Philips Electronics N.V.
This document is printed on chlorine free produced paper.
Philips Communication & Security Systems
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