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SECTION 7 PERFORMANCE TEST
7-8
7.3.4 FM deviation and FM distortion
(1) Test specifications
• Range 0 to 125 Hz (≥125 kHz, <250 kHz)
0 to 250 Hz (≥250 kHz, <500 kHz)
0 to 500 Hz (≥500 kHz, <1 MHz)
0 to 1 kHz (≥1 MHz, <2 MHz)
0 to 2 kHz (≥2 MHz, <4 MHz)
0 to 4 kHz (≥4 MHz, <8 MHz)
0 to 10 kHz (≥8 MHz, <16 MHz)
0 to 25.6 kHz (≥16 MHz, <32 MHz)
0 to 51.2 kHz (≥32 MHz, <64 MHz)
0 to 102 kHz (≥64 MHz, <128 MHz)
0 to 256 kHz (≥128 MHz, <256 MHz)
0 to 512 kHz (≥256 MHz, <512 MHz)
0 to 1024 kHz (≥512 MHz, ≤1040 MHz)
0 to 2048 kHz (>1040 MHz, MG3642A only)
• Accuracy with reference to Source=Int1 1 kHz, and in a 300 Hz to 3 kHz demodulation band:
± (5 % of set value +10 Hz) (≥0.4 MHz, <512 MHz)
± (5 % of set value +20 Hz) (≥512 MHz, ≤1040 MHz)
± (5 % of set value +40 Hz) (>1040 MHz, MG3642A)
• Distortion with reference to ≥16 MHz, and Source=Int1 1 kHz
<–40 dB (FM=3.5 kHz deviation)
<–45 dB (FM=22.5 kHz deviation)
(2) Measuring instrument for test
• Modulation analyzer
• Distortion meter
(3) Setup
Fig. 7-4. FM Deviation and FM Distortion
RF
IN
AF
OUT
INPUT
Modulation analyzer
Distortion meter
Demodulation
signal
MG3641A/MG3642A