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Fiber Optic Video Communications 
Unidirectional Video + Data Products
MODEL LM200 |
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| MODEL
LM200 |
1 Channel FM Video with Return Audio or Data Channel |
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| DESCRIPTION
The LM200 and LM200i are Frequency Modulated
(FM), fiber optic video systems that transmits
a video signal in one direction and an audio
or data signal in the opposite direction
over one fiber (LM200i) or two fibers (LM200).
Distances of 6Km over one multimode fiber
and over 10OKm over one singlemode fiber.
PAL, SECAM or NTSC formats, in B&W or
color, are seamlessly transmitted. The LM200's
capabilities are enhanced by it's compatibility
with Lascomm's PC based SpectraSmart TM
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
- Laser Based Back-Biased Photo Detection Circuitry
for Stable Optical Output Over Full Temperature
Range (Singlemode)
- ST™, FC Optical Connector
- 10 MHz Video Bandwidth
- 10 Hz to 20 KHz Audio Bandwidth
- DC to 300 Kb/s Data Rate
- Meets EIARS-170, RS-343A
- Frequency Modulated (FM) Transmission
- SpectraSmart™ Compatible
- Meets NEMA TS1 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
- 3 Pin Terminal Block Connector for Data or
Audio
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CONFIGURATIONS
The 200 product family is available as rack mount
cards that can be installed in all of Lascomm's
card chassis, desk chassis and 19" racking
frames. This system can be configured in either
star (module to rack) or trunking (rack to rack)
configurations. This product requires no user
adjustments & features superior quality and
performance.
APPLICATIONS
- Security and Surveillance
- Military Communications
- Intelligent Transportation System (ITS)
- Access Control
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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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Audio |
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I/O Impedance......................................
...........................................................
I/O Level..............................................
Frequency Response...............................
THD......................................................
SNR...................................................... |
600 Ohm, 10 kOhm, 47
kOhm
Balanced/Unbalanced
-6 to +6 dBm
10 Hz to 20 KHz
<1%, 1 KHz @ max modulation
>60 dB (weighted)* |
* As per RS-250C, measured @ 1Km
(multimode), @ 10Km (singlemode) |
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Data |
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Formats................................................
...........................................................
...........................................................
...........................................................
Rate.....................................................
Bit Error Rate.........................................
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RS-232D, RS-422A, GenLock,
Manchester, Biphase, 4-20
mA
Current Loop, TTL,
Contact Closure
DC to 300 Kb/s
10-9* |
* As per RS-250C, measured @ 1Km
(multimode), @ 10Km (singlemode) |
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Connectors |
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Video...................................................
Audio..................................................
Data....................................................
Optical.................................................
Power..................................................
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75 Ohm BNC (Gold Center
Pin)
3 Pin Terminal Block
3 Pin Terminal Block
ST™, FC
2 Pin Terminal Block |
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Power**
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Card...................................................
Module................................................
Adapter for SR-500/S............................ |
2.5
W
100mA@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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182mm(7.16")L, 132mm(5.21")
W
29 mm (1.15") H
160mm(6.3")L, 20mm(0.8")W
100 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...................................................
.......................................................... |
>235,000
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 |
| 62.5/125 |
-15/-18 |
-33/-33 |
15** |
850/1300 |
ST |
39 |
| Singlemode (Laser) |
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| 9/125 |
-7*** |
-36 |
29 |
1310 |
ST,FC |
41 |
| 9/125 |
-10*** |
-36 |
26 |
1550 |
ST,FC |
41 |
| 9/125 |
-10/-10 |
-34 |
24 |
1310/1550 |
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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