A high-performance point-to-point (PTP) wireless backhaul link was successfully deployed in the region of Comitán, Chiapas, spanning a distance of 28.63 km (17.7 miles). The project was engineered to deliver massive network throughput by pairing NetPoint NP6-DP-3FT parabolic dish antennas (3-foot / 32–34 dBi gain) with Cambium Networks ePMP Force 4600C radios operating over an ultra-wide 160 MHz channel in the 6 GHz spectrum.
The solution achieved an aggregate throughput of 2.61 Gbps (1,458.478 Mbps Downlink / 1,157.646 Mbps Uplink measured via UDP/TCP testing with 1500-byte packets), maintaining 100% link quality and an SNR margin reaching up to 50 dB.
Operating Parameters & RF Environment
Location: Comitán, Chiapas, Mexico
Link Distance: 28.63 km (17.7 miles)
Center Frequency: 6615 MHz (6 GHz Band)
Channel Bandwidth: 160 MHz
Transmitter Output Power (Tx Power): 25 dBm
Hardware & Configuration:
Antennas: NetPoint NP6-DP-3FT (3 ft dish, high-efficiency dual-slant parabolic antenna)
Radios: Cambium Networks Force 4600C (ePMP Slave / Bridge Mode)
Firmware: v5.4.0
Spectrum Analysis
Spectral analysis at the subscriber site demonstrated the massive operational advantage of the 6 GHz band in the region. While the traditional 5.7 GHz – 6.4 GHz spectrum exhibits heavy utilization and noise floor spikes (ranging between -30 dBm and -60 dBm), the upper segment from 6455 MHz to 6775 MHz provided an exceptionally clean RF environment. This permitted the deployment of a wide 160 MHz channel centered at 6615 MHz completely free of co-channel interference.
RF & Alignment Metrics
The precise alignment and high gain of the NetPoint NP6-DP-3FT antennas yielded excellent RF metrics over the 28.6 km path:
Downlink RSSI: -52 dBm to -54 dBm
Uplink RSSI: -54 dBm
Downlink SNR: 48 dB to 50 dB
Uplink SNR: 48 dB
Link Quality (Uplink/Downlink): 100%
Link Capacity: 60% – 75%
Link Performance & Traffic Capacity (Throughput Test)
Wireless link capacity testing conducted using large packet payloads (1500 bytes) delivered the following performance:
Traffic MetricMeasured CapacityDownlink Throughput1,458.478 Mbps (1.45 Gbps)Uplink Throughput1,157.646 Mbps (1.15 Gbps)Aggregate Throughput2,616.124 Mbps (2.61 Gbps)
Modulation Profiles (MCS)
The high signal margin and clean RF environment allowed the link to continuously operate at dense modulation orders:
Downlink MCS: DS 9 (256-QAM 5/6) scaling up to DS 10 (1024-QAM / 4096-QAM) under dynamic traffic load.
Uplink MCS: DS 8 (256-QAM 3/4) sustained during full stress testing.
Combining NetPoint NP6-DP-3FT dish antennas with Cambium Force 4600C radios in Comitán, Chiapas, proves that delivering fiber-like backhaul capacity (+2.6 Gbps real throughput) over nearly 30 kilometers is fully achievable over the air. Utilizing a 160 MHz channel width in the uncrowded 6 GHz spectrum provides ISPs and WISPs with a scalable, high-density wireless transport solution without relying on costly fiber optic deployments.
