Manual Part 22

1365 Adams Court, Menlo Park, CA 94025
Wireless Link, Model No: FWT-8100
FCC ID: NJIFW8100
Date of Test: April 18 to April 23, 2001
Report # 20451372 22 of 91 FCC Part 22
6.0 Emission Limitations, Occupied Bandwidth
FCC 2.1049, 22.917(b)(d)
For F3E/F3D emission mask uses with audio filter, the mean power of emissions must be attenuated below the
mean power of the unmodulated carrier wave (P) as follows:
(1) On any frequency removed from the carrier frequency by more than 20 kHz but not more than 45 kHz:
at least 26 dB;
(2) On any frequency removed from the carrier frequency by more than 45 kHz, up to the first multiple of
the carrier frequency: at least 60 dB or (43 + 10 log P) dB, whichever is the lesser attenuation.
For F1D emission mask, the mean power of emissions must be attenuated below the mean power of the
unmodualted carrier (P) as follows:
(1) On any frequency removed from the carrier frequency by more than 20 kHz but no more than 45 kHz:
at least 26 dB;
(2) On any frequency removed from the carrier frequency by more than 45 kHz but not more than 90 kHz:
at least 45 dB;
(2) On any frequency removed from the carrier frequency by more than 90 kHz, up to the first multiple of
the carrier frequency: at least 60 dB or (43 +10 log P) dB, whichever is the lesser attenuation.
6.1 Test Procedure
The RF output of the transceiver was connected to the input of the spectrum analyzer through sufficient
attenuation. The audio generator was connected to the audio input of the transceiver.
The spectrum with no modulation was recorded. The audio input signal was adjusted to obtain the frequenciy
deviation equal 6 kHz at the audio frequency of maximum response which was determined measuring deviation
versus frequency from 300 Hz to 3.5 kHz and was found 2.8 kHz. The audio input level was increased by 16 dB.
The audio frequency was set to the frequency 2.5 kHz.
The resolution bandwidth of the spectrum analyzer was set at 300 Hz and the spectrum was recorded in the
frequency band ±50 kHz and ±100 kHz from the carrier frequency. The same plots has been done for wideband
emissions, SAT, ST, DTMF9, Voice, some of the combinations of these modulating signals and in TDMA mode.