Operating Manual Vol 1 - ES Documentation

SMIQModulation - General2.6 Modulation - GeneralThe SMIQ offers the following modulations and digital standards:• Analog modulations- Amplitude modulation (AM)- Broadband AM (BB-AM)- Frequency modulation (FM; with option SM-B5 only)- Phase modulation (PM; with option SM-B5 only)- Pulse modulation (PULSE)• Vector modulation (VECTOR MOD)• Digital modulation (DIGITAL MOD; option SMIQB20)• Digital standards (DIGITAL STD;-PHS; IS95/CDMA - option SMIQB42; NADC; PDC; GSM;DECT; W-CDMA - option SMIQB43; 3GPP W-CDMA - option SMIQB45;Enhanced Channels – option SMIQB48; options SMIQB20 and SMIQB11)For AM, FM, PM and digital modulation internal or external modulation sources can be used.For BB-AM, pulse and vector modulation only external modulation sources can be used.2.6.1 Modulation SourcesInternal Modulation SourcesThe internal modulation generator LF GEN is available for AM, FM and PM. The generator suppliessinusoidal signals in the frequency range from 0.1 Hz to 1 MHz. For a more detailed description, cf.Section "LF Generator".The internal modulation coder (option SMIQB20) supplies PRBS signals, clock signals or modulationdata for the digital modulations. The data generator (option SMIQB11) supplies modulation data andcontrol signals. For a more detailed description, cf. Section "Digital Modulations".External Modulation SourcesThe appropriate input sockets to the different modulations in the case of external supply can be takenfrom Table 2-1.Table 2-1 Input sockets for the different types of modulationInputModulation EXT1 EXT2 PULS I Q DATA PAR DATA BIT CLOCK SYMBOLCLOCKPOW RAMPAMXBB-AMXFM1 X XFM2 X XPM1 X XPM2 X XPULSEXVECTOR MOD X X XDIGITAL MOD X X X X X1125.5555.03 2.55E-8