Full-Hemisphere LEO/MEO TT&C
The PXY-750 AET is a 7.5 m tri-band S/X/Ka fixed ground station built for low- and medium-orbit satellite tracking, telemetry, command and high-speed data reception. A three-axis Azimuth-Elevation-Tilt pedestal drives the third axis automatically to remove the zenith keyhole, so passes directly overhead are tracked without interruption. The station acquires at 3º elevation and receives from 5°, delivering full standard TT&C and non-coherent spread-spectrum TT&C in S-band together with X-band and Ka-band mission-data reception up to 1.6 Gbit/s.
Integrated Station, Not Just an Antenna
PXY-750 AET is delivered as a complete nine-subsystem station: antenna servo & feed, transmit/receive RF chains, software-defined TT&C and data-transmission basebands, monopulse tracking, station control & management, data recording, time & frequency, comprehensive support equipment and an optional radome. Ranging, velocity and time-difference measurement, remote-command transmission with small-loop command comparison and telemetry demodulation are all handled inside the integrated baseband. Recorded data is forwarded to the mission centre over 10 Gbit/s networking in real time or post-pass.
- 7.5 m aperture, tri-band S/X/Ka operation
- 3-axis A-E-T pedestal - no zenith keyhole, seamless overhead tracking
- Standard TT&C and non-coherent spread-spectrum TT&C in S-band
- X- and Ka-band high-rate data reception up to 1.6 Gbit/s
- Monopulse auto-tracking on S, X and Ka with automatic switching
- Multi-target (4 × CDMA) same-beam TT&C capability
- Acquisition at 3º elevation, reception from 5°
- Program track with position offset ±10° and time offset ±20 s
- Radome
| GENERAL SPECIFICATIONS | PXY-750 | ||
| Reflector Diameter | 7.50m | ||
| Antenna Mount | A-E-T (Azimuth / Elevation / Tilt), 3-axis | ||
| Primary Mission | LEO/MEO TT&C, high-speed data reception | ||
| Tracking Method | Monopulse (S, X & Ka), program (TLE/ephemeris), digital guidance, memory, manual | ||
| Acquisition / Reception Elevation | 3° / 5° | ||
| Power Suply | AC 220 V ±10% single-phase & 380 V ±10% three-phase, 50/60 Hz* | ||
| RF CHARACTERISTICS | S-Band | X-Band | Ka-Band |
| Frequency (GHz) Tx | 2.025 - 2.120 | 7.145 - 7.250 | 30.0 - 31.0 |
| Frequency (GHz) Rx | 2.200 - 2.300 | 7.750 - 8.500 | 20.2 - 21.2 |
| G/T @ 10° Elevation (dB/K) (clear sky, 23 °C, at LNA output) | ≥ 17.0 | ≥ 32 | ≥ 35.0 |
| EIRP (dBW) (200 W SSPA) | ≥ 61.5 | ≥ 75.0 | ≥ 86.2 |
| Polarization Tx | LHCP/RHCP (Switchable) | LHCP/RHCP (Switchable) | LHCP/RHCP (Simultaneous) |
| Polarization Rx | LHCP/RHCP (Switchable) | LHCP & RHCP (Simultaneous) | LHCP/RHCP (Simultaneous) |
| Axial Ratio (dB) | ≤ 1.2 | ≤ 1.0 | ≤ 1.0 |
| VSWR | ≤ 1.5:1 | ≤ 1.5:1 | ≤ 1.35:1 |
| Tx/Rx Isolation (dB) (at Tx freq.) | ≥ 95 | ≥ 85 | ≥ 85 |
| Rx/Tx Isolation (dB) (at Rx freq.) | ≥ 40 | ≥ 40 | ≥ 40 |
| Difference-channel Tx Blocking (dB) | ≥ 90 | ≥ 85 | ≥ 85 |
| First Sidelobe Level (dB) | ≤ -14 | ≤ -14 | ≤ -14 |
| Difference-beam Null Depth (dB) | ≥ 30 | ≥ 30 | ≥ 30 |
| IF Interface | 70 MHz (TT&C/Tracking) | 1.2 GHz (data), 70 MHz (Tracking) | 1.2 GHz (data), 70 MHz (Tracking) |
| Pointing Accuracy (R.M.S.) | ≤ 0.25° | ≤ 0.07° | ≤ 0.02° |
| Tracking Accuracy (R.M.S.) | ≤ 0.13° | ≤ 0.035° | ≤ 0.01° |
| Overhead Tracking | Third axis auto-positioned east/west - no blind spot at zenith | ||
| MECHANICAL SPECIFICATIONS | Azimuth | Elevation | Tilt (3rd axis) |
| Travel Range | 0° to ±355° | -1° to 181° | 0° to ±175° |
| Maximum Velocity | 20°/s | 10°/s | 5°/s |
| Maximum Acceleration | 10°/s² | 10°/s² | |
| ENVIRONMENTAL SPECIFICATION | |||
| Wind Speed Operational | 90 km/h | ||
| Wind Speed Survival | 240 km/h survival | ||
| Temperature Range Operational | -40 °C to +55 °C | ||
| Temperature Range Storage | -45 °C to +70 °C | ||
| Relative Humidity | 2 - 98% @ 25 °C, non-condensing | ||
| Lightning Protection | Independent lightning rods, grounding ≤ 4 Ω (equipment) / ≤ 10 | ||
| Radome | Optional | ||
