4.5 Typical System Configuration
This section shows the Compact Outdoor SSPB in a common system application. Figure
Indoor Equipment | Outdoor Equipment |
IFL Cable
PARADISE |
DATACOM |
RS485 M&C
IF: 950 - 1450 MHz
Ref: 10 MHz
Figure
4.6 IFL Cable Considerations
Consideration should be given to using a high quality IFL between the indoor equipment and Compact Outdoor SSPB. The system designer must always consider the total cable loss for a given length and also the implications of the slope of attenuation across the 950 to 1450 MHz bandwidth. Table
Table 4-3: Common Coaxial Cable Characteristics
Cable Type | Center | Outer | Attenuation at | Attenuation at | Slope across | Slope across |
| Conductor DC | Diameter | 950 MHz | 1450 MHz | band for 100 | band for 300 |
| Resistance per | (inches) | dB per 100 ft. | dB per 100 ft. | ft. cable (dB) | ft. cable (dB) |
| 1000 ft. |
|
|
|
|
|
1.7 | .425 | 7.8 | 11.3 | 3.5 | 10.5 | |
|
|
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|
|
|
Belden 8214 | 1.2 | .403 | 6.8 | 9.2 | 2.4 | 7.2 |
|
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|
|
Belden 7733 | .9 | .355 | 5.8 | 8.3 | 2.5 | 7.5 |
|
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|
|
|
Belden 9914 | 1.2 | .403 | 4.5 | 6.3 | 1.8 | 5.4 |
|
|
|
|
|
|
|
Belden 9913 | .9 | .403 | 4.2 | 5.6 | 1.4 | 4.2 |
|
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It is recommended to use a quality grade of 50 ohm cable such as Belden 9913, 9914, or 7733. Check the manufacturer’s technical data to make sure that the insulation is sufficient for the particular installation including the cable’s temperature range. Also make sure the coaxial connector from the IFL cable to the Compact Outdoor input is wrapped with a weather sealing tape to prevent water intrusion into the coaxial cable.
Operations Manual, HPA3, Mini Compact Outdoor SSPA | 208143 REV - | 45 |