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Fiber Optic Video Communications 
Unidirectional Video + Audio Products
MODEL LM180 |
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| MODEL
LM180 |
1 FM Video with 3 Audio or Data Channels |
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| DESCRIPTION
The LM180 is a Frequency Modulated (FM)
state-of-the-art fiber optic system that
transmits a real time video signal plus
three data signals or two data with one
audio signal or one data and two audio signals
(in same direction) over one multimode or
Singlemode fiber. PAL, SECAM or NTSC formats,
in B&W or color, are seamlessly transmitted
distances of up to 6Km (multimode) and 100
Km (Singlemode). Available formats are Balanced/Unbalanced
Audio, GenLock, Manchester, Biphase, RS-232D,
RS-422A, 4-20mA Current Loop, TTL, and Contact
Closure (option for open collector). The
capabilities of the Model 180 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
- Laser Based Back-Biased Photo Detection Circuitry
for Stable Optical Output Over Full Temperature
Range (Singlemode)
- ST™, FC Optical Connector
- 7 MHz Video Bandwidth
- 10Hz to 20KHz Audio Bandwidth
- DC to 300 Kb/s Data Rate
- Meets EIARS-170, RS-343A
- Frequency Modulated (FM) Transmission
- SpectraSmart™ Compatible
- Meets NEMATS1/TS2 and Caltrans Specifications
- Utilizes Internal Switching Power Supplies
- Meets RS-250C Transmission Requirements
- Compatible with All NTSC, PAL, or SECAM Systems
- LED Status Indicators Provide Rapid Indication
of Critical Operating Parameters
- 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 Style Data Connector for Audio and/or Data
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CONFIGURATIONS
The LM180 is available as rack mount cards that
can be installed in all of Lascomm's card chassis
and 19" racking frames. The LM180 can be
converted to module by installing it in the SR-500
card chassis. This system can be configured in
either star (module to rack) ortrunking (rack
to rack) configurations.This product requires
no user adjustments and features superior quality
and performance.
APPLICATIONS
- Security and Surveillance
- Intelligent Transportation System (ITS)
- Access Control
- Distance Learning
- Video Teleconferencing
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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,
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)
DE-15 Female
DE-15 Female
ST™, FC
2 Pin Terminal Block |
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Power**
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Card...................................................
Module................................................
Adapter for SR-500/S............................ |
3.5
W
140mA@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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Green..................................................
Red..................................................... |
Video,
Audio, Data Activity
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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181 mm (7.15") L,
24mm (.95") W
132 mm (5.20") H
160 mm (6.3") L,
20mm (0.8") W
100mm (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...................................................
.......................................................... |
>165,000
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 |
29 |
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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