User's Manual

Chapter 8: Tools
Using the OFDM Frame Calculator tool
Page 8-45
Approximate
distance for Max
Range
The Max Range value used for frame calculation
AP Transmit End
In bit times, this is the frame position at which the AP/BHM ceases
transmission.
AP Receive Start
In bit times, this is the frame position at which the AP/BHM is ready to
receive transmission from the SM/BHS.
AP Receive End
In bit times, this is the frame position at which the AP/BHM will cease
receiving transmission from the SM/BHS.
SM Receive End
In bit times, this is the frame position at which the SM/BHS will cease
receiving transmission from the AP/BHM.
SM Transmit Start
In bit times, this is the frame position at which the SM/BHS starts the
transmission.
SM One Way Air
Delay
This filed displays the time in ns, that SM/BHS is away from the AP/BHM.
SM Approximate
distance
This field displays an approximate distance in miles (feet) that the
SM/BHS is away from the AP/BHM.
To use the Frame Calculator to ensure that all APs or BHMs are configured to transmit and receive
at the same time, follow the procedure below:
Procedure 33 Using the Frame Calculator
1
Populate the OFDM Frame Calculator parameters with appropriate values as
described above.
2
Click the Calculate button.
3
Scroll down the tab to the Calculated Frame Results section
4
Record the value of the AP Receive Start field
5
Enter a parameter set from another AP in the system – for example, an AP in the same
cluster that has a higher Max Range value configured.
6
Click the Calculate button.
7
Scroll down the tab to the Calculated Frame Results section
8
If the recorded values of the AP Receive Start fields are within 150 bit times of each
other, skip to step 10.
If the recorded values of the AP Receive Start fields are not within 150 bit times of
each other, modify the Downlink Data parameter until the calculated results for AP
Receive Start are within 300 bit time of each other, if possible, 150 bit time.