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L-band hardware

Required for L-band MSG LRIT/HRIT, GOES LRIT, MTSAT LRIT/HRIT, COMS-1 LRIT/HRIT and Electro LRIT/HRIT reception. Click here to see the areas covered.

1.2m, 1.8m, 2.4m, 3.0m or 3.7m parabolic dish

  • Solid powder-coated aluminium (1.2m, 1.8m) or glass-fibre reinforced precision compression moulded polyester reflector with three segments (2.4m) or eight segments (3.0m, 3.7m).
  • Supplied with galvanised steel azimuth/elevation mount and pedestal, and up to 100m of RG213 50Ω co-axial cable.

Feed, LNA and downconverter

  • Integrated feed/downconverter (1.2m, 1.8m, 2.4m, 3.0m) or scalar horn (3.7m) with N-type output.
  • LNA/downconverter designed for harsh radio environments with pre-select filter to reduce cellular phone and radar interference.
  • Low noise figure of 1.2dB (92K) typical.
  • Weatherproof O-ring sealed machined case and connectors.

L-band dish antennas and LNBs

Left: 3.0m/3.7m L-band dish antenna and LNB; Right: 1.2m/1.8m/2.4m L-band dish antenna and LNB

L-band LNA/downconverter and scalar feed

Left: L-band LNA/downconverter; Right: L-band scalar feed (3.7m dish)

Specifications of L-band dish antennas:

 
1.2m
1.8m
2.4m
3.0m
3.7m
Reflector type
Prime focus parabolic
Prime focus parabolic
Prime focus parabolic
Prime focus parabolic
Prime focus parabolic
Reflective material
Solid aluminium, powder coated
Solid aluminium, powder coated
3-segment glass-fibre reinforced polyester
8-segment glass-fibre reinforced polyester
8-segment glass-fibre reinforced polyester
Diameter
1.2m
1.8m
2.4m
3.0m
3.7m
F/D ratio
0.38
0.42
0.37
0.30
0.37
Gain
24dBi
27.5dBi
30.3dBi
32.2dBi
34.1dBi
Polarisation
Linear
Linear
Linear
Linear
Linear
G/T @ 5° elevation
2.2dB/K
6dB/K
9.6dB/K
11.7dB/K
13.5dB/K
Operational wind speed
112km/h
112km/h
80km/h
72km/h
72km/h
Survival wind speed
201km/h
201km/h
201km/h
201km/h
201km/h

Specifications of L-band feed and LNA/downconverter:

Feed type
PCB patch IFD (1.2/1.8/2.4/3.0m)
Scalar horn (3.7m)
Polarisation
Linear (RHC for Electro)
RF input
1691MHz ±25MHz
LNA noise figure
1.2dB typical
Pre-LNA filter
3-pole, –3dB ±60MHz
Total gain
>50dB
LO frequency
1553.5MHz
RF output
137.5MHz ±25MHz

USB LRIT receiver

  • High-quality, low-cost receiver for LRIT transmissions from MSG direct broadcast, GOES, MTSAT, COMS-1 and Electro services.
  • Fully compatible with the forthcoming GOES-R HRIT service.
  • Housed in a sleek, compact, durable extruded aluminium case with styled ABS bezels.
  • USB interface for fast, reliable data transfer to the host computer.
  • Fully software controlled, with detailed status reports available.
  • Built-in time-stamped fault logging.
  • 20-LED real-time signal level display for easy dish alignment and operational signal monitoring.
  • Status LEDs for LNB power, signal lock, USB ready, control communications, data buffer status and frame synchronisation detection.
  • Adjustable RF attenuator to accommodate LNB signal inputs between –15dBm and –75dBm.
  • Supports QPSK and BPSK demodulation.
  • Built-in hardware Viterbi decoding.
  • Supplies power to the LNB via the RF input.
  • Powered by an external switch mode PSU (supplied).
  • DC–DC converter PSU also available for battery or portable operation (input 10.6–15V DC).
  • Can be supplied without a dish antenna or LNB for upgrading WEFAX systems if existing components are suitable. Please contact us to discuss this.

Dartcom USB LRIT receiver

Dartcom USB LRIT receiver

RF input frequency
135MHz to 144MHz (1688.5MHz to 1697.5MHz from a 1691MHz to 137.5MHz LNB)
Frequency resolution
5kHz
RF input connector
50Ω BNC
RF input level
–15dBm to –75dBm
Symbol rates
64kSPS to 1024kSPS
Viterbi decoding
1/2, K=7, G1=171, G2=133
Demodulator modes
QPSK, BPSK
Data encodings
NRZ-S, NRZ-M, NRZ-L
Digital interface
USB port
Power requirements
15V DC @ 2A
LNB power
14–15V DC nominal @ 0.75A via RF input
PSU
External switch mode, input 100–240V AC 47–63Hz @ 1.2A, output 15V DC @ 3.4A
Dimensions (W×H×D)
175×60×240mm
Weight
1.7kg (including PSU)

USB LRIT/HRIT receiver rack

  • High quality, high performance, professional grade receiver for LRIT and HRIT transmissions from MSG direct broadcast, GOES, MTSAT and COMS-1 services.
  • Available in LRIT, HRIT or combined LRIT/HRIT configurations.
  • Rugged 4U-high 19" rack.
  • Plug-in modules for ease of maintenance and to allow for future upgrades.
  • USB interface for fast, reliable data transfer to the host computer.
  • Fully software controlled, with detailed status reports available.
  • Comprehensive LED and character matrix status displays and diagnostic points on the front panel.
  • Supplied with up to two state-of-the-art multi-mode DSP receiver modules and USB interface modules.
  • Each receiver module supplies power to the LNB via its RF input.
  • Supports QPSK, BPSK and PSK demodulation.
  • Built-in hardware Viterbi decoding.
  • Rack or desk mount versions available.
  • Powered by 100–240V AC mains, 50–400Hz.
  • Upgradable to support HRPT or AHRPT/LRD by purchasing additional plug-in modules together with a tracking antenna system and associated ingest software.

Dartcom USB LRIT/HRIT receiver rack

Dartcom USB LRIT/HRIT receiver rack

RF input frequency
126MHz to 154MHz
RF input connector
50Ω N-type
IF conversion
Direct, 70MHz, 50MSPS, 10-bit
Frequency resolution
25kHz
Symbol rates
0.1MSPS to 3.5MSPS
Viterbi decoding
1/2, K=7, G1=171, G2=133, 5.2dB coding gain at 10–5 BER
Demodulator modes
QPSK, BPSK, PSK
Data encodings
NRZ, NRZ-S, NRZ-M, Biphase-L
Performance
QPSK/BPSK within 1dB of theoretical, 0.5dB typical
Digital interface
USB port
Power requirements
100–240V AC @ 50–400Hz