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Provides a high degree of protection from intermodulation when used in congested urban sites.
Comprises of four (4) 100mm (four inch) 1/4 wavelength resonant capacitively shortened cavity resonators.
The duplexer is factory tuned to Customer specified frequencies, but may be field tuned with the frequency band.
Bandpasses the wanted frequencies and rejects other external unwanted frequencies closely separated from the tuned frequencies.
Unlike Band-Reject diplexers, the FF4 series of duplexers provide a large degree of isolation in the frequency range between the transmitter and receiver frequencies. (refer to dotted lines on graph | | | |
All extruded aluminium, welded and chromate passivated before finishing with gray enamel.
This range of duplexer has a particular application in semi portable / transportable repeater application becuase of it's robust construction and tuning stability. | | | |
Tuning instructions are supplied with each unit to allow in field re-tuning to a new set of frequencies if required.
Transmitter to receiver frequency separations from 3.0 to 6.0 MHz may be field tuned. | | |
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| MODEL NO |
FF4-4N2D |
| FREQUENCY RANGE |
162 - 175 MHz |
| IMPEDANCE |
50 ohms |
| VSWR |
1.3:1(max) |
| PASSBAND |
200 KHz (typical) |
| INSERTION LOSS |
1 db (max) |
| ISOLATION |
90 dB @ Tx Freq. |
| ISOLATION |
90 dB @ Rx Freq. |
| CONFIGURATION |
BANDPASS/BANDREJECT |
| POWER |
150 Watts (input) |
| CONNECTORS - INPUT |
'N' FEMALE |
| CONNECTORS - OUTPUT |
'N' FEMALE |
| WIDTH |
483 mm |
| DEPTH |
490 mm |
| HEIGHT |
133 mm |
| WEIGHT |
7.5kg |
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