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3.2 MODULATION CHARACTERISTICS (FCC Rule Part 2.1047)
3.2.1Audio Frequency Response (FCC Rules Part 2.1047 (a) &
80.213)
3.2.1.1 Method of Measurement
The FS-2570 is connected with measuring equipment as shown in Fig. 3.2.1.1.
A single audio tone is applied to the transmitter and varied over the range 100 to 5000 Hz.
Output power is measured for variation of audio frequency with the output level 30 W referred
to as 0 dB.
Fig. 3.2.1.1
3.2.1.2 Test Result
1. Output level for respective audio frequency is plotted in Fig. 3.2.1.2.
2. Carrier levels on each mode are as in Table 3.2.1.
Table 3.2.1
Class of
emission
mode below pep Limit
J3E Suppressed Carrier mode 56.2 dB at least 40 dB
EUT
SSB RADIOTELEPHONE
Watt Meter
Model DJ522-OH-2
S/N: 46507
Tokyo Denpa
DC Power Supply
Model GP035-50R
S/N: 13086029
Takasago
Audio Volt-Meter
Model 161
S/N: 2961776
Kikusui
-43 dB Coupler
Spectrum Analyzer
Model TR4173
S/N: 85580030
Takeda Riken
Plotter
Model HI-80
S/N: 02006569
Epson
Audio Signal Gen.
Model AG-253
S/N: 1100026
Kenwood
Audio Signal Gen.
Model AG-253
S/N: 7090003
Kenwood
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