Page 204 - GuideFWA

RECOMMENDATION: Since there is no dependency on the 1910-1930 MHz band, apply
these limits as a revised mask to the spreadsheet. For the base mask, -48.229 dBm / 300 Hz
versus the carrier power (+47-20 dBm / 300Hz) gives –75.229 dB. For the mobile, the existing –
45dB spec is tighter than the –13dBm limit.

Frequency Offset BASE STATION TERMINAL
(kHz) (MOBILES)

Lower Upper Measurem. TX Noise Measurem. TX Noise
Limit limit bandwidth Floor at bandwidth Floor at

(kHz) offset (dB) (kHz) offset (dB)

0 29.9 0.3 0.0 0.3 0.0

30 59.9 0.3 -26.0 0.3 -26.0

60 89.9 0.3 -45.0 0.3 -45.0

90 134.9 0.3 -60.0 0.3 -45.0

135 any other 0.3 -75.229 0.3 -45.0

1.6.3. AENS View

AENS believe that in the IS-136 TDMA standard and the FCC rules, the limit of -13 dBm in a
1MHz measurement bandwidth applies to both Base Stations and Mobiles, in the 1910-1930
MHz band.

AENS agree that there are two implementation errors in Report [1] and in the original
spreadsheet:

• The value of -13 dBm/1MHz is equivalent to -48.229dBm/300 Hz instead of -48.29dBm/300
Hz

• In the original spreadsheet, it was included in cell C44 the correction assuming certain dBc
related to the IS-136 Base Station TX power (47 dBm), but this value was also used for
Mobiles, where the TX power is lower (30 dBm)

1.7. PROPOSED CHANGES TO SPREADSHEET

A new “Results” worksheet has been added to the spreadsheet along with a command macro.
This will provide matrices such as in II.C.2 and II.C.3 directly, by iteratively calling the main
spreadsheet calculations. The choice of desensitization value and of including or excluding
fading are manually selectable.

Based on the above, spreadsheet AENScalc.xls (AENS view) or LMNQcalc.XLS (LMNQ view)
have been created and should be used for the calculations and corrected summary results tables
replacing tables II.C.2.1, II.C.2.2, II.C.3.1 and II.C.3.2 in [1] are attached (see Appendix).

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