Assembly Instructions

Ripwave Base Station I&C Guide Navini Networks, Inc.
250 Part #40-00047-00 Rev F v1.0 (TTA)
October 23, 2003
signal strength at each antenna. (RX sensitivity + UL TCC power - 10*LOG10(320)
+ 9).
E. Noise level (I69-I76)
Calculated digital noise floor of the system measured in a 5 MHz BW.
F. Noise Figure (K69-K76)
Calculated by adding the spreading gain of the individual carriers back in and
subtracting the thermal noise floor (KTB) in a 500 KHz BW.
G. RX gain (DAC word) (M69-M76)
The data word generated during calibration for the receiver gain DAC that controls
the IF attenuator. It is found in the EMS under Air interface > Layer 1 > Show
configuration > Antenna tab.
IV. Section 4: Transmitter Performance
A. Analyzer Readings (A90-B97)
1. Peak
The peak amplitude of the sync signal measured on the spectrum analyzer.
The measurement is taken with the spectrum analyzer in the time domain (0
Hz span) and RBW set for 5 MHz. Sweep time is typically between 10 and 20
ms. When taking the measurement, the sync signal will have peaks and
valleys associated with it. Make sure to measure the absolute peak.
2. RMS
This is a calculated value based on measurements taken on several occasions,
comparing peak power to RMS power on a Rhode & Schwartz spectrum
analyzer. It has been determined that the correction factor for peak to average
on a standard spectrum analyzer is 9.5 dB. This correction factor is the default
entry in this section. If it is possible to make the RMS measurement with the
proper equipment then that is the preferred method. The calculation is very
straightforward: peak power minus 9.5 dB = Power RMS.
B. P out transceiver (D90-E97)
Power peak and Power RMS are calculated values using the value from the spectrum
analyzer readings and the value entered for coupler/test cable loss (Cell H31).
C. Power at antenna (RMS) (G90-G97)
Calculated value using the Output Power (P
out
) of the transceivers and the Cable Loss
plus the inherent loss of the RFS.
D. Radiated Power (RMS) (I90-I97)
Calculated value using Power at the antenna and the value entered for antenna gain
(Cell H32).
E. TX Gain (DAC word)
The hex data generated during calibration for the transmit gain DAC that controls the
IF attenuator. This is found in the EMS under Air interface > Layer 1 > Show
configuration > Antenna tab.
F. Max power deviation across all antennae (E99, G99, I99)
Calculated value showing the deviation between the lowest power antenna and the
highest power antenna for each column.