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Power and Grounding Requirements 5-3
Table
Metrocell DC Power performance requirements
Description |
| Requirements |
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| Maximum |
| Nominal |
| Minimum |
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Module or unit level operating voltage range | 29.00 Vdc |
| 27.00 Vdc |
| 21.00 Vdc |
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Metro RF Frame current draw per feed (A or B) with all PAs | 75 Adc |
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transmitting at full RF output power |
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Metro RF Frame power distribution voltage drop (from the | 0.65 Vdc |
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feed input at the RIP to any module) |
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Metro RF Frame power distribution resistance (from the | 40 |
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feed input at the RIP to any module) | MOhms |
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Metro RF Frame operating voltage range (measured at the | 29.00 Vdc |
| 27.00 Vdc |
| 21.60 Vdc |
RIP power feed input) |
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Metro RF Frame minimum voltage to guarantee maximum |
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| 26.20 Vdc |
PA RF power is available (measured at the RIP power feed |
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input) |
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Power Plant normal operating "Float" voltage range | 27.60 Vdc |
| 27.25 Vdc |
| 27.00 Vdc |
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Power Plant "Equalize" voltage (one to two days) | 29.00 Vdc |
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Power Plant voltage drop | 0.25 Vdc |
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Maximum power feed length (measured from Metro RF |
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Frame RIP to Power Plant breaker |
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#2/0 AWG or Welding Copper Wire | 60 feet |
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#1/0 AWG or Welding Copper Wire | 47 feet |
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Absolute maximum voltage (no damage, | 30.50 Vdc |
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applied continuously) |
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Transient voltage immunity (Metro RF Frame modules) for | 40 Vdc |
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300 ∝s |
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Noise from battery (system and module immunity) |
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into 600 Ohms | 56 dBmC |
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from 10 kHz to 20 MHz in 3 kHz BW into 50 Ohms | 100 mV |
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| (rms) |
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from dc to 100 MHz into | 250 mV |
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Noise to battery (system and module emissions) |
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from 300 Hz to 10 kHz (where Ip is the steady state | 9+10logIp |
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dc current draw) | dBmC |
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from 10 kHz to 1 MHz | Ip**0.5 mV |
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| (rms) |
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Broadband noise | 250 mV |
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Battery step (system and module immunity) within nominal | ±3 Vdc |
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operating range with 1 V/ms maximum rate of change) |
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