CODAN 8W KU-BAND BUC FOR VSAT SYSTEM, 6908 W/E-48/EX-CE L-BAND IF LBUC

1. Manufacturer/Brand: CODAN (now part of Cobham SATCOM, following acquisitions. The products are often still referenced by the Codan name).

2. RF Output Power: 8 Watts (8W). This is the saturated power output in the Ku-Band frequency.

3. Frequency Band: Ku-Band. This BUC takes an L-Band input signal and converts it up to Ku-Band for transmission to the satellite. The exact transmit frequency range (e.g., 13.75–14.5 GHz) would be specified in the full datasheet.

4. Key Model Number Indicators:

   • 6908: This is likely Codan’s core model series for this BUC family.

   • W/E-48/EX-CE: This suffix encodes critical configuration options:

     • W: Often denotes a Wideband frequency model.

     • E-48: Specifies the Power Supply Voltage. -48V DC is a standard voltage in telecom and VSAT installations, typically using negative grounding.

     • EX-CE: Likely indicates specific Export Compliance and Certification markings (e.g., for European market – “CE” conformity).

5. Critical Feature: L-Band IF

   • LBUC: This stands for L-Band Input BUC. It is the most common and versatile type.

   • It accepts an Intermediate Frequency (IF) input in the L-Band range (typically 950–2150 MHz).

   • This allows it to be compatible with a wide range of satellite modems (IDUs) that output a standard L-Band signal. The modem handles the modulation and coding, sending the clean IF to the BUC for upconversion and amplification.

6. Application: FOR VSAT SYSTEM

   • This BUC is a core component of a VSAT (Very Small Aperture Terminal) outdoor unit (ODU).

   • It is mounted on the antenna feed and is responsible for transmitting the signal to the geostationary satellite.

A complete datasheet for the Codan 6908 8W Ku-Band BUC would generally include:

• RF Output Power: 8W Saturated (approx. +39 dBm).

• Input Frequency (IF): L-Band, e.g., 950–1750 MHz or 950–2150 MHz (model dependent).

• Output Frequency (RF): Ku-Band, e.g., 13.75–14.5 GHz (model dependent).

• Gain: Typically ~55 dB (fixed or with some adjustment range).

• Gain Flatness: e.g., ±1.5 dB over the band.

• Phase Noise: Specifications critical for higher-order modulations.

• Local Oscillator (LO) Stability: e.g., ±1.5 ppm over operational temperature.

• Power Supply: -48V DC (as indicated by E-48), with a specified operating range (e.g., -40V to -60V).

• Control Interface: 10 MHz Reference Input (standard for timing) and a Monitor & Control (M&C) interface. Older models may use a simple 0-5V ALARM pin, while newer ones feature a full RS-485/RS-422 interface for detailed monitoring (frequency, gain, temperature, alarms) and control (on/off, gain adjustment).

• Connectors:

  • IF Input: Type-F female (for L-Band).

  • RF Output: WR-75 waveguide or a waveguide-to-coaxial transition.

  • Power & Control: Multi-pin circular connector (e.g., 9-pin).

• Operating Temperature Range: e.g., -40°C to +60°C (typical for outdoor equipment).

In a typical VSAT installation:

1. The indoor modem (IDU) generates the modulated L-Band signal.

2. This signal travels via coaxial cable to the outdoor unit (ODU).

3. The BUC receives the L-Band signal, converts it to Ku-Band, amplifies it to 8W, and sends it to the antenna feed.

4. The antenna dish focuses and transmits the signal to the satellite.