Digital Link | GL75P
Global Foxcom’s GL75P Digital Link is a Sat-Light Gold Series optical link for transporting 1PPS, synchronization, data, and other digital or analog signals up to 30 MHz over fiber. Built as a high-performance alternative to coaxial cable-based distribution, the GL75P uses high dynamic range laser technology and ultrafast processing to deliver low-jitter, low-delay signal transport across long distances.
Features & Benefits
- DC-30 MHz digital optical link
- Supports 1PPS timing signals
- Transports sync, data, digital, and analog signals up to 30 MHz
- TTL input/output signal range into 50 ohms
- 10 km transmission distance
- Compatible with all 1st Generation Sat-Light products
- High dynamic range DFB laser design
- Ultrafast processing for minimum jitter and delay
- Adjustable link gain from -10 dB to +1 dB
- ±2 dB amplitude response at unity gains from 2–30 MHz
- 100 dB/Hz/2/3 SFDR
- +30 dBm typical OIP3
- 15 V maximum input without damage
- BNC50 input/output RF connector type
- 1550 nm optical wavelength
- FC/APC optical connector
- 4 dB optical budget
- 7–18 VDC supply voltage range
- Operating temperature ranges from -10°C to +55°C
Basic Details
Timing, synchronization, and low-frequency signal distribution often become challenging when signals need to travel across long coaxial cable paths. This optical link transfers 1PPS, sync, data, digital, and analog signals up to 30 MHz over fiber, giving engineering teams a more stable way to manage signal transport across satellite, RF over Fiber, broadcast, and communication system installations.
The transmitter and receiver pair operate over a 1550 nm fiber path with FC/APC optical connectivity and BNC50 electrical interfaces. A high dynamic range DFB laser and ultrafast processing support low jitter and delay, while compatibility with 1st Generation Sat-Light products supports integration into existing Global Foxcom platforms.
Basic Details
| RF Specification | Value |
| Frequency Range – Bandwidth | DC-30MHz |
| Amplitude Response @ Unity Gain | more than or equal to 2dB |
| Noise Figure | 20-23 dB |
| Output IP3 (OIP3) | +20-+30dBm |
| Input Signal Range – Total Power | 0-5V |
| RF Output Signal Range – Total Power | 0-5V |
| Optical Specifications | |
| Optical Budget / Distance | 1550 nm |
What makes the GL75P suitable for timing and synchronization applications?
The link uses a high dynamic range DFB laser and ultrafast processing to support low jitter and delay during 1PPS and synchronization signal transport.
Which applications benefit most from 1PPS transport over fiber?
Satellite communication systems, timing distribution networks, RF over Fiber platforms, broadcast systems, and reference signal distribution setups benefit from 1PPS transport where timing stability and distance are most relevant.
Does the GL75P integrate with earlier Sat-Light systems?
Yes. The GL75P is compatible with 1st Generation Sat-Light products, making it suitable for system upgrades, replacements, or extensions within existing Sat-Light environments.
Which signal levels does the GL75P support?
The GL75P supports a 0–5 V input and output signal range, with TTL input/output power into 50 ohms.