U2894B Datasheet, PDF (14/16 Pages) TEMIC Semiconductors – Modulation PLL for GSM, DCS and PCS Systems

U2894B
Application for PCS1900
PCS 1900
USER TOL.
Figure 22. Modulation spectrum
PCS 1900
Figure 23. Phase error
Complete transmitters (including PA) were measured.
The test equipment was the R & S CMD55 performing
standard approval tests. Typically, the spectrum @
400 kHz off the center carrier frequency is approximately
–65 dB attenuated (–60 dB according specificarion). The
corresponding rms phase error is in the range of about 3°.
Dimensioning the loop-filters allows you to optimize
spectral-and phase error performance.
14 (16)
Rev. A4, 30-Sep-98