User Manual

I&C Guide 9/26/2003
Determine the maximum capable BTS output power to the antenna.
= [(PA Output to Meet FCC) or (to Meet SNR)] – BTS Loss – RFS Loss – BTS Antenna Cable Loss*
[Column A or B]
1
– [Column E]
2
– [Column F or G] – [Calculated* or Measured]
• BTS Antenna Cable loss
< 18 dB for ACTIVE RFS configurations
• BTS Antenna Cable loss
< 8 dB for PASSIVE RFS configurations
Change the EMS settings accordingly.
*Sub-procedure: Calculate BTS antenna cable loss, referring to Table 8.
= [[Distance (length in ft) 100 ft] x Attenuation value/cable type] + 0.6 for 6 connectors/3 cables
..
Determine the maximum BTS output power that can be calibrated.
= Max Synth Input + Cal Cable Loss + Min Cal Board Loss
3
+ Backplane Loss
4
[Column K] + [Calculated or Measured] + [Note
3
] + [Default of 5.0 in EMS or Measured]
Determine the actual** max BTS output power available to the antenna.
= The lesser of the two values of Step/Formula 1 and Step/Formula 2 (aka, the “floor”)
** Actual is what you can calibrate the BTS at.
Determine the minimum BTS output power that can be calibrated .
= Min Synth Input + Cal Cable Loss + Max Cal Board Loss
3
+ Backplane Loss
4
[Column J] + [Calculated or Measured] + [Note
3
] + [Default of 5.0 in EMS or Measured]
Determine the actual
** maximum EIRP.
= Step/Formula 3 + Antenna Gain. The antenna gain is affected by the type of antenna (omni, panel, 2.3,
2.4, etc.) and refers to the values in the RFS Configuration Script that accompanied the antenna from
Manufacturing.
**Actual is what you can calibrate the BTS at.
Determine the minimum BTS RX input power that can be calibrated.
= Min Synth Output - Cal Cable Loss - Min Cal Board Loss
3
- Backplane Loss
4
[Column H] - [Calculated or Measured] - [Note
3
] - [Default of 5.0 in EMS or Measured]
Determine the maximum BTS RX input power that can be calibrated.
= Max Synth Output - Cal Cable Loss -Max Cal Board Loss
3
- Backplane Loss
4
[Column I] - [Calculated or Measured] - [Note
3
] - [Default of 5.0 in EMS or Measured]
Antenna
Cable
Selection
S
te
p
/Formula 2
S
te
p
/Formula 4
S
te
p
/Formula 3
S
te
p
/Formula 5
S
te
p
/Formula 6
S
te
p
/Formula 7
Cal
Cable
Selection
S
te
p
/Formula 1
..