Signals originating from an FM band aerial reach a filter-amplifier-matching circuit combination. After this stage a 4-way splitter or an 8-way splitter takes place. The instrument contains 4 pcs of 4-way splitter or 2 pcs of 8-way splitter. For the best stability two switching power supplies are used, if one of them falls out a warning LED illuminates. If both of the power supplies are switched off a passive bypass way is switched on automatically. If one of the two amplifiers falls out the powering current of this stage will be switched off while the communication wll carried by the other stage.

• Two switching power supplies and two amplifier
stages for redundant work
• Bandpass filter for the FM broadcast band
• Passive bypass branch for case of power-cut
• 50Ω input impedance
• 75Ω output impedance
• 0dB attenuation
• 19” 1U size

TECHNICAL DATA__________________________________________________________________
Type HRFM-U44 HRFM-U28
Number of input ports [pcs] 4 2
Number of output ports [pcs] 4 x 4 2 x 8
Frequency range [MHz] 87.5...108
Maximal input level [dBμV] 100
Gain [dB] 0
Return loss [dB] >16
Flatness [dB] ±0.5
Separation between RF input ports [dB] 40
Separation between RF output ports [dB] 30
Spectral noise density in 1MHz [dBm] -94
Intermodulation distance 2 signals, max. level [dB] 80
Input impedance [Ω] 50
Input connector SMA-Connector
Output impedance [Ω] 75
Output connector F-Connector
Power supply voltage [VAC] 230, 50Hz
Power consumption [W] <10 <5
Temperature range [°C] 0...+40