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DPR8-4V
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DPR8-6V
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| | Electrical specifications
| Model |
DPR8-4V |
DPR8-6V
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| Operating Frequency band, MHz |
140-174
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| Insertion loss (adjustable) not more, dB |
1,5 |
2,2
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| Frequency separation TX/RX (min), MHz |
0,5 |
0,275
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| Impedance, Ohm |
50
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| Isolation, not less, dB |
80 |
95
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| VSWR, not more than |
1,5
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| Input power, not more, W |
not more than 300
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| Temperature Range, °C |
from -30 to +60
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| Cavity electrical length |
1/4λ
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Mechanical specifications
| Model |
DPR8-4V |
DPR8-6V
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| Diameter, mm (ins.) |
206 (8")
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| Weight, kg |
14,2 |
21,7
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| Connector |
N-female
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| Mount to rack |
yes |
yes
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| Length/Width/Depth, mm |
800x480x420 |
1600x480x420
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Duplexer DPR8-4V assembled from high-Q 8-inch diameter cavities by band pass-reject scheme. It has three level of adjustment: frequency, separation TX/RX value, rejection and pass level. It’s designed to provide full-duplex operation for one antenna of repeater or radio station with high power output. Used commonly under nonstandard frequency separation conditions.
Implemented temperature compensating (thermostable) techniques enable to use the device in not heated locations. Duplexer attachment points enable to mount it into standard 19-inch repeater rack.
DPR8-4(6)V provides duplex operation at lower frequency separation, unlike duplexers assembled on 5-inch cavities
Typical duplexers response curves
DPR8-4V
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DPR8-6V
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