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Comtech EF Data LCS-4 L-Band Combiner Switch

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  • 4-way L-Band combining
  • 4-Way L-Band splitting
  • Hot swap power supplies
  • Manual and Remote operations


LCS-4 Specifications

Operating Frequency 950 to 1950 MHz (L-Band)
Modems Supported SDM-300L3 Digital Satellite Modem



    CDM-570L Satellite Modem

    CDM-600L Open Network Satellite Modem

    CDM-Qx Multi-Channel Satellite Modem
Tx IF Connector Type N, Female, 4 combined inputs, 2 switched outputs
Tx Return Loss 10 dB minimum, 50Ω
Tx Gain -10 dB maximum loss, Combiner Input to unit output
Tx Input Level 0 dBm composite operating, +10 dBm no damage
Rx IF Connector Type F, Female. 2 switched inputs and 4 split outputs
Rx Return Loss 10 dB minimum, 75Ω
Rx Gain 0 ±3 dB, LNB Input to Splitter Output
Rx Input Level 0 dBm composite operating, +10 dBm no damage
Frequency Reference Internal or external
Reference Stability 10 MHz, 0.02 ppm (Internal)
Int/Ext Reference Phase Noise

(Frequency Offset)

    1 Hz

    10 Hz

    100 Hz

    1 kHz

    10 kHz

    100 kHz


-80 dBc/Hz

-110 dBc/Hz

-135 dBc/Hz

-140 dBc/Hz

-150 dBc/Hz

-150 dBc/Hz
Reference Level ODU/BUC: 0 ± 3 dBm

LNB: -3 ± 3 dBm
External Reference Input 10 MHz, -10 to +15 dBm, 1 BNC Female connector
Reference Output 0 dBm ±3 dB at 4 BNC female connectors
Reference Return Loss Input/Output: 15 dB minimum, 50Ω
Power Supply 1 or 2 assemblies hot swap from front panel. Includes unit power supply or unit power + ODU/BUC supply
ODU/BUC Supply 24 VDC 100W, AC Input (see prime power)

48 VDC 180W, AC Input
Switchover Time Within 1.5 seconds of fault detection
Environmental and Physical
Temperature Range



0 to 50°C (32° to 122°F)

-40 to +70°C (-40° to 158°F)
Dimensions (2RU) 3.5H x 19.0W x 21.25D inches

(8.9H x 48.3W x 54D cm)
Weight 15 Pounds (7.0 kg)
Prime Power, AC

    No BUC

    100W BUC PS

    180W BUC PS
90 to 264 VAC, 47 to 63 Hz

70W maximum

180W (1 BUC PS), 300W (2 BUC PS) max

275W (1 BUC PS), 500W (2 BUC PS) max
Approvals CE as follows: EN 55022 Class B (Emissions), EN 50082-1 (Immunity), EN 60950 (Safety), FCC Part 15 Class B

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