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Fiber Optic Video Communications 
Unidirectional Video + Audio Products
MODEL LM300 |
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| MODEL
LM300 |
1 Video with 1 Duplex Audio or Data Channel |
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| DESCRIPTION
The LM300 and LM300i are Frequency Modulated
(FM), fiber optic video systems that transmits
a video signal in one direction with duplex
audio or duplex data signal, on one fiber
(LM300i) or two fibers (LM300), for 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 LM300'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
- 7 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 300 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 7 MHz @ -3 dB
<2% typical
<1.5° typical
65 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 Current
Loop,
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)
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............................ |
3.2
W
130mA@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...................................................
.......................................................... |
>230,000
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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