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Comtech EF Data LBC-4000 L-Band Up/Down Converter System

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  • Web/SNMP M & C
  • 1 MHz Step Size, 1 kHz option
  • Redundant option available
  • IF to L-Band Frequency Conversion


LBC-4000 L-Band Down Converter IDU
Input Frequency 950 to 2000 MHz, 125 kHz steps
Range (1 kHz optional)
Output Frequency70 ± 18 MHz (140±36 MHz optional)
Input/Output Impedance50O
Input Return Loss15 dB minimum
Output Return Loss 18 dB minimum
Input ConnectorType N, Female
Output ConnectorBNC, Female
Gain 35 dB nominal at min attenuation
User Attenuation Range0 t0 40 dB, in 0.25 dB steps (0.1 dB opt)
Output Power, P1dB +10 dBm minimum
Third Order Intercept +20 dBm minimum
Carrier Spurious -60 dBc
Non-Carrier Spurious -60 dBm
LBC-4000 L-Band Up Converter IDU
Input Frequency 70±18 MHz (140±36 MHz optional)
Output Frequency950 to 2000 MHz, 1 MHz steps

(1 kHz optional)
Input/Output Impedance50 O
Input Return Loss 18 dB minimum
Output Return Loss15 dB minimum
Input ConnectorBNC, Female
Output ConnectorN Female
Gain 25±1 dB nominal at minimum attenuation
User Attenuation Range0 to 40 dB, in 0.25 dB steps

(0.1 dB optional)
Input Power Level To +10 dBm, maximum
Output Power, P1dB+10 dBm minimum
Third Order Intercept+20 dBm minimum
Carrier Spurious-60 dBc
Non-Carrier Spurious-75 dBm
Transmit Phase NoiseExceeds MIL-STD-188-164A
External Reference5 MHz, 10 MHz ±5 dBm
Operating Temperature-0° to +50°C
Operating Altitude10,000 ft above sea leve
Operating Humidity5 to 95 non-condensing
Non-Operating Temperature58° to 160°F (-50 to +71°C)
Dissipation35 Watts total, 2 converters
Prime Power 90 to 260 VAC, 47 to 63 Hz
Dimension s (1RU)19W x 1.75H x 22D inches

(48.30W x 4.45 H x 55.90D cm)
Weight 25 lbs. (11.34 kg) maximum
External Reference
Input Frequency5 or 10 MHz
Input Level ±5 dB
Input Impedance50O
Monitor & Control
Serial M&C InterfaceTIA/EIA-232, TIA/EIA-485, 4-wire
Serial Connector9 pin D, Female
Alarm Contacts3 Form C summary
Alarm Connector9 pin D, Female

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