C-Band Optical RF Down Link | PL7CD30T / PL7CD30R4
The PL7CD30T and PL7CD30R4 from Global Foxcom’s Platinum Series are precision-engineered C-Band fiber optic links developed for professional satellite downlink operations. They provide stable, high-quality RF transport across the 3400 to 4200 MHz range within a 4 dB optical budget.
Features & Benefits
- C-Band frequency range 3400 to 4200 MHz
- DigiRF™ management via front-panel LCD and SNMP
- IMizer™ calibration of IMD and CNR for signal quality optimization
- Wide dynamic range and low noise performance
- Multiple RF and optical connector options
- 1550 nm and CWDM laser options for longer fiber runs
- Hot-swappable modules for continuous uptime
- No fans required under full system load
The PL7CU30T transmitter and PL7CU30R4 receiver deliver dependable C Band RF over fiber for long distance downlink applications. The modules install in the PL7010 chassis with redundant power and fan free operation for continuous duty. The link provides clean, linear transport with tight amplitude flatness across typical channel bandwidths and strong dynamic range to protect constellation quality. Optical options include 1310 nm, 1550 nm, and CWDM to suit different site layouts.
Basic Details
| RF Specification | Value |
| Frequency Range – Bandwidth | 3400–4200 MHz |
| Amplitude Response @ Unity Gain | +/- 2 |
| Noise Figure | 20 to 40 |
| Output IP3 (OIP3) | 20 |
| Input Signal Range – Total Power | -25 to -5 |
| RF Output Signal Range – Total Power | 0 to -25 |
| Optical Specifications | |
| Optical Budget / Distance 1310nm 1550nm | 8/15 |
What types of systems use the PL7CD30T / PL7CD30R4?
This model is commonly integrated into satellite downlink facilities, cable headends, and network distribution systems requiring wideband C-Band transmission with minimal signal distortion.
What distinguishes the downlink configuration from uplink models?
The downlink version is optimized for lower input signal levels and enhanced receiver sensitivity, ensuring consistent performance when receiving C-Band signals from satellite antennas.
Can the link operate in high-humidity or outdoor environments?
The modules are designed for rack-mounted indoor environments. When used for outdoor applications, they are typically paired with environmental enclosures that protect the fiber and connectors.
How does the link preserve signal quality across C Band?
It holds ±0.5 dB amplitude flatness over a 36 MHz channel, achieves up to 105 dB·Hz2⁄3 SFDR with 20 dBm OIP3, and keeps group delay variation near 1 ns.
Is the PL7CD30 compatible with multiplexed fiber systems?
Yes. CWDM ITU Grid laser options enable the system to operate over multiplexed fiber networks, allowing multiple RF channels to be combined on a single optical fiber without interference.