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Fiber Optic Video Communications 
Bi-directional
MODEL LM800 |
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| MODEL
LM800 |
1 FM Video with 2 Audio and/or Data Channels |
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| DESCRIPTION
The LM800 and LM800i are Frequency Modulated
(FM) fiber optic video systems that transmit
a duplex video signal plus a combination
of three voice and/or data signals for distances
of 6Km on multimode fiber and over 100Km
on singlemode fiber. The LM800 operates
over two optical fibers and the LM800i operates
over one optical fiber. PAL, SECAM or NTSC
formats, in B&W or color, are seamlessly
transmitted. The LM800's capabilities are
enhanced by if 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
- 7 MHz Video Bandwidth
- 10 Hz to 20KHz Audio Bandwidth
- DC to 300 Kb/s Data Rate
- Meets EIARS-170, RS-343A
- Frequency Modulated (FM) Transmission
- SpectraSmart™ Compatible
- Meets NEMA TS1AS2 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
- DB Type Connector for Data and/or Audio
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CONFIGURATIONS
The 800 product family is available as a rack
mount card 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
- Intelligent Transportation System (ITS)
- Video Teleconferencing
- Distance Learning
- 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 7 MHz @ -3 dB
<2% typical
<1.5° typical
64 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,
RS-485 2w/4w, Manchester,
Biphase, 4-20mA CurrentLoop,
TTL, Contact Closure,
Sensornet
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)
DE-15 Female
DE-15 Female
ST™, FC
5 pin Male DIN |
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Power**
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Card...................................................
Module................................................
Adapter for SR-1000/S...........................
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8.7
W
360mA@24VAC
Model PS-100 |
** Due to variations of drivers
and diagnostic options, power
shown at maximum measurements |
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Indicators (LEDs)
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Red.....................................................
Green (8).............................................
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Power
On
Video, Audio, Data Activity
LED's |
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Physical
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Dimensions:
Module (w/SR-1000)..............................
..........................................................
Card....................................................
..........................................................
Weight:
Module (w/SR-1000)..............................
Card...................................................
Number of Rack Slots............................
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182 mm(7.16") L,
165mm(6.5") W
44 mm (1.75") H
160mm(6.3")L, 40mm(1.7")W
100 mm (4")H
1350 g (48 oz.)
675 g (24 oz.)
Two
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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...................................................
.......................................................... |
>135,000
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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