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Registered under nr. 501 400 699
Last update: 14/05/2012
MA-250 Antenna Multicoupler
The MA-250 Antenna Multicoupler allows two 50W VHF transceivers to share the same antenna, thus reducing the number of required antennas in radio communication systems. The MA-250 is based on wideband VHF coupling rather than on frequency filtering, so the only restriction concerning frequency allocation is a 10% minimum frequency separation for a minimum cosite rejection in the power amplifiers.
Whenever antennas with VSWR 2:1 or higher are used, the MA-250A variant shall be used to keep the operation of the power amplifiers safe. The MA-250A causes greater attenuation, but, on the other hand, increases isolation between the two transceivers connected to it. An emergency direct connection is provided for one of the connected transceivers, bypassing all multicoupler circuitry.
Technical information
| General | |||
| Frequency Range | 30 to 108 MHz | ||
| Maximum RF Power (per input) | 60 W (PEP, CW) | ||
| Impedance | Input and Output: 50Ω | ||
| Transmitter isolation | ≥20 dB @ 50Ω | ||
| ≥10 dB with VSWR = 1:3 (MA-250) | |||
| 15 dB with VSWR = 1:3 (MA-250A) | |||
| Insertion loss | ≤3.8 dB via coupler (MA-250) | ||
| ≤6.8 dB via coupler (MA-250A) | |||
| ≤0.1 dB via emergency connection | |||
| Environmental | MIL-STD-810F | ||
| Temperature | -40ºC to +70ºC (operating) | ||
| -25ºC to +55ºC (full specs) | |||
| Vibration | method 514.5 | ||
| Shock | method 516.5 | ||
| Leakage | EN 60529 IPX5 | ||
| Mechanical | |||
| Dimensions (W x H x D) | 160 x 92 x 185 mm | ||
| Weight | 3.5 kg |
