IQ EV9980 RF J4 Q I Variable Attenuator Variable Attenuator TL9 Variable Attenuator Down Mixer Attenuator BALUN TL8 CMX998 PA Error Amplifier Variable Attenuator Modulator Filter Amplifier Input Amplifier Coupler J9 TX_OUT 400MHz Q J7 RFOUT I TL6 TL7 TL10 TL3 TL1 J5 TXIJ3 TXQJ6 TXI+ J8 TX_OUT 800MHz TL4 Output @ 450MHz Forward Path J2 TXQ+ Feedback Path IQ Input Input Amplifier Filter Amplifier Error Amplifier Modulator RFOUT PA Coupler / TX_OUT PA Coupler External Attenuator Filter Balun Variable Attenuator Down-Converter I J5 + J6 TL10 TL7 TL6 Q RF J2 + J3 TL1 TL3 TL4 Typical Level PEP Saturated Output PEP Gain Vpk-pk 2 1 1 0.3 dBm Vpk-pk dBm dB 2.7 2.7 2.7 -1.2 -2.2 33.3 J7 J8 9.5 33.5 33 -0.3 33 14.5 -2 -2.5 -3 -20 TL9 TL8 1 -6 0 N/A -1 -1 35.5 2 -18.5 -16.5 -0.5 -0.5 -17 30 Note1: The gain of the modulator is calculated given that the input signal is in IQ format i.e. when calculated from either I or Q channel the gain must be corrected by -6 dB. Note 2: As with the modulator the down-converter gain includes +6dB relative to the datasheet gain because the signal is present in I and Q channels. Note 3: The voltages quoted as 'Typical Levels' are those observed in I or Q channels, i.e. not the composite signal. Issue 2. 3.6.2010