Model 8640B TM 9-4935-601-14-7&P
PERFORMANCE TESTS
4-19. SINGLE SIDEBAND PHASE NOISE TEST
SPECIFICATION:
SSB Phase Noise at 20 kHz Offset from carrier:
(Averaged rms noise level below carrier stated in a 1 Hz bandwidth.)
256 MHz to 512 MHz: > 130 dB from 230 to 450 MHz increasing linearly to > 122 dB down at 550 MHz.
0.5 MHz to 256 MHz: Decreases approximately 6 dB for each divided frequency range until it reaches SSB
Broadband Noise Floor of > 140 dB.
DESCRIPTION:
Phase noise is measured with a spectrum analyzer. A reference signal generator and a mixer are used to down-convert
the test Signal Generator's CW signal to 0 Hz (the two signal generators are phase locked together). Then the spectrum
analyzer measures SSB phase noise at a 20 kHz offset from the carrier.
NOTE
This test measures the total SSB phase noise of both generators. Therefore, the reference signal
generator must have SSB phase noise that is less than or equal to the specification for the test
generator.
Figure 4-6. Single Sideband Phase Noise Test Setup
4-15
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...