DF and Monitoring Stack
SYST-A0004
The SYST-A0004 is an antenna stack comprising DF-A0038 vertical polarisation DF and Omni, and OMNI-A0099 and OMNI-A0100 horizontal omni antennas. At the base it is supported by the MISC-A0047 support cage. All RF and control signals pass through the MISC-A0045 amplifier block which compensates for cable losses. Mounted on a mast, with vertical and horizontal polarisation monitoring, and interferometric direction finding, it provides a complete spectrum monitoring and DF solution. A DF switch can be mounted at the base of the DF array. Its cables can be fed back into the mast and routed through the omnis. The horizontal-polarisation omni antennas feature a cable duct for connection of antennas above, without distortion of their patterns. All monitoring antennas share a common axis, giving excellent radiation patterns.
Additional information
Specifications
| Frequency range | 20 - 3000 MHz |
| Polarisation | Vertical |
| Nominal input impedance | 50 O |
| Connectors | 15 x TNC-M on cables |
| Cable exit | Standard flange for switch mounting |
| Power supply requirements | DC 15±1 V |
| Dimensions | Ø2.6 m x 5.5 m |
| Total mass | 125 kg |
| Internal joining | Bolted flanges |
| Mounting method | Flange mounted 8 off 12 mm holes on 280 mm PCD |
| Wind survival | 160 km/h (without ice) |
| Effective wind area | 1.8 m 2 (including DF switch) |
| Temperature (operational) | -30 °C to +70 °C |
| Temperature (storage) | -40 °C to +71 °C |
- Radio Direction Finding
- C-ESM
Product Applications
Signals Intelligence
- Three-band direction finding array optimised for two-channel receivers. Hinge mounting flange for DF switch, with cable re-entry port. Vertical and horizontal monitoring. Concentric design eliminates shadowing.
