PERFORMANCE TESTS
HARMONIC AND LINE-RELATED SPURIOUS TEST 4-12.
The Harmonic and Line-Related Spurious Test uses an RF spectrum analyzer to
compare the level of the harmonic signal and close-in spurious signals to the desired
signal at various programmed frequencies.
REQUIREMENTS:
• RF harmonics: <-30 dBc for levels <= +13 dBm.
• Power line spurious signals: -40 dBc (signals within 15 kHz of carrier)
TEST EQUIPMENT:
• RF Spectrum Analyzer
PROCEDURE:
1. Connect the UUT RF OUTPUT to the RF spectrum analyzer input.
2. Program the UUT to SPCL 909.
3. Program the UUT to +13 dBm and 0.5 MHz.
4. Set the RF spectrum analyzer controls to display the UUT output signal and its
harmonics (at least three harmonics wherever possible). Be careful not to overload
the analyzer input. Overloading the RF spectrum analyzer causes it to generate
harmonics, thus invalidating the test.
5. Verify that all the harmonics are more than 30 dB below the fundamental signal.
6. Program the UUT to 7.0 dBm.
7. Verify that all the harmonics are more than 30 dB below the fundamental signal for
the following frequencies:
14, 20, 40, 80,
160, 320, 550, 640, 700, 850, 950,
and
1056 MHz.
8. Set the RF spectrum analyzer to display the UUT output signal with a 2-kHz span
and 10-Hz resolution. Verify that all spurious signals are below -40 dBc for
frequencies listed in step 7.
9. Set the RF spectrum analyzer to display the UUT output signal with a 50-kHz span
and 30-Hz resolution. Verify that all spurious signals are below -40 dBc for
frequencies listed in step 7.
4-15
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