|
|
|
|
|
 |
RF5-1V
|
RF5-2V
|
RF8-1V
|
RF8-2V
|
| | Electrical specifications
| Model |
RF5-1V |
RF5-2V |
RF8-1V |
RF8-2V
|
| Operating Frequency band, MHz |
140-174
|
| Insertion loss (adjustable), dB |
0,5-3 |
1-3 |
0,5-3 |
1-3
|
| Impedance, Ohm |
50
|
| Attenuation (see fig.n) Δf BP/BR=400 kHz(RF5), dB |
23 |
50 |
18 |
40
|
| Δf BP/BR=200 kHz(RF8), dB |
|
| VSWR, not more than |
1,5
|
| Input power, not more, W |
not more than 300
|
| Temperature Range, °C |
from -30 to +60
|
| Cavity electrical length |
1/4λ
|
|
|
Mechanical specifications
| Model |
RF5-1V |
RF5-2V |
RF8-1V |
RF8-2V
|
| Diameter, mm (ins.) |
128 (5") |
206 (8")
|
| Weight, kg |
1,8 |
4,2 |
3,3 |
7,3
|
| Connector |
N-female
|
| Mount to 19-inch rack |
optional |
yes |
optional |
yes
|
| Length/Width/Depth, mm |
800x128x128 |
800x480x140 |
800x206x206 |
800x480x210
|
| |
Bandreject filters RF5-1V are recommended to use in radio stations and repeaters receiving section if nearby powerful transmitter, operating at known neighboring frequency, is present. These are signals of paging transmitters or repeater native transmitters, usually. Bandreject filter enables to effectively eliminate interference at significantly lower frequency separation, unlike bandpass filter.
Model RF5-2V is assembled from two single filters RF5-1V, connected by cables in series and fastened mechanically by metal brackets.
Typical selectivity characteristics
RF5-1V, RF5-2V
|
RF8-1V, RF8-2V
|
| |
|
 |