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Fiber Optic Video Communications 
Unidirectional Video Products
MODEL LM190 |
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| MODEL
LM190 |
3 Channel FM Video System over 3 fibers |
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| DESCRIPTION
The LM190 is a Frequency Modulated (FM)
fiber optic video system that transmits
and receives three real time video signals
over three multi-mode or singlemode fibers.
PAL, SECAM and NTSC formats in B&W or
color are seamlessly transmitted distances
of 6Km (multimode) and 10OKm (singlemode).
The 190's capabilities are enhanced by it's
compatibility with Lascomm's PC based SpectraSmart
Network Management and Diagnostic software
system. SpectraSmart™ supervises the
operating parameters of the transmission
system such as status on video levels, sync,
FM carrier detect, voltage, temperature,
optical levels, etc., and external equipment
which are attached to the Lascomm equipment.
See the SpectraSmart™ brochure for
more details. |
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| FEATURES
- Surface Mount Technology (SMT) for High
Reliability and Repeatability
- Hot Swappable Cards
- ST™,FC Optical Connector
- 10MHz Video Bandwidth
- Meets EIARS-170, RS-343A
- SpectraSmart™ Compatible
- Meets NEMATS1 fTS2 and Caltrans Specifications
- Utilizes Internal Switching Power Supplies
- Meets RS-250C Transmission Requirements
- Compatible with All NTSC, PAL, or SECAM
Systems
- Automatically Resettable Solid-State Current
Limiters on All Power Lines: Provides Equipment
Protection
- Wide Optical Dynamic Range: Optical Attenuators
are Never Required
- BNC Video Connector
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CONFIGURATIONS
The LM190 is available as a rack mount card that
can be installed in all of Lascomm's card chassis,
desk chassis and 19" racking frames. LM190
are compatable with LM140 Single Channel Systems.
The LM190 can be converted to a module by installing
it in the SR-500 card chassis. This system can
be configured in either star (module to rack)
or trunking (rack to rack) configurations and
can accommodate up to 54 transmitters or receivers
in a 19" chassis for high density applications.
This product requires no user adjustments and
features superior quality and performance.
APPLICATIONS
- Security and Surveillance
- Military Communications
- Intelligent Transportation System (ITS)
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SPECIFICATIONS |
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Video |
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Format..................................................
Voltage/Impedance................................
Bandwidth.............................................
Differential Gain.....................................
Differential Phase...................................
SNR......................................................
Return Loss...........................................
Field Tilt................................................
Carrier Frequency................................... |
NTSC, PAL, SECAM
1 Vp-p, 75 Ohm, 1.5 Vp-p
max.
5 Hz to 10 MHz @ -3 dB
<2% typical
<1.5° typical
66 dB weighted*
>30 dB
<0.5% max.
70 MHz |
* As per RS-250C, measured @ 1Km
(multimode), @ 10Km (singlemode) |
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Connectors |
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Video...................................................
Optical.................................................
Power..................................................
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75 Ohm BNC (Gold Center
Pin)
ST™, FC
2 Pin Terminal Block |
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Power**
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Card...................................................
Module................................................
Adapter for SR-500/S............................ |
3
W
120mA@24VAC
Model WP-24 |
** Due to variations of drivers
and diagnostic options power shown
at maximum measurements |
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Indicators (LEDs)
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Red..................................................... |
Power
On |
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Physical
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Dimensions:
Module (w/SR-500)................................
..........................................................
Card....................................................
..........................................................
Weight:
Module (w/SR-500)................................
Card...................................................
Number of Rack Slots............................
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182 mm (7.16") L,
132mm(5.21")W
29 mm (1.15") H
160 mm (6.3") L,
(0.8") W
10 mm (4") H
900 g (32 oz.)
450 g (16 oz.)
One
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Enviromental
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Operating Temperature..........................
Storage Temperature.............................
Relative Humidity.................................. |
-40°C
to +74°C
-55°C to +85°C
0 to 95% Non-condensing |
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Quality |
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MTBF...................................................
.......................................................... |
>175,000
hours @ Ground Fix
35°C per MIL217F |
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Optical
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Fiber Type/Size
(um) |
Optical Output
(dBm) |
Reciever Sensitivity
(dBm) |
Optical Budget
(dB) |
Wavelength
(nm) |
Optical
Connector |
Optical Dynamic
Range (dB) |
| Multimode* (SLED) |
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| 62.5/125 |
-13 |
-34 |
21** |
850 |
ST |
39 |
| 62.5/125 |
-16 |
-34 |
18** |
1300 |
ST |
39 |
| Singlemode (Laser) |
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| 9/125 |
-7*** |
-36 |
28 |
1310 |
ST,FC |
41 |
| 9/125 |
-10*** |
-36 |
26 |
1550 |
ST,FC |
41 |
* Distance is limited to fiber
loss, splices and fiber bandwidth
** For 50/125μm fiber, subtract
3dB
*** Higher output lasers available |
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