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LT5512 Downconverting Mixer Single-Tone Measurements for 1230 MHz CATV Band.
1. Connect all test equipment as shown in Figure 2.
2. Set the Power Supply output voltage to 5V, and set the current limit to 100mA.
3. Connect TP1 (EN) to the 5V power supply. Mixer is in ENABLE mode.
4. Set the Signal Generator #1 to provide an 1800MHz, -10dBm, CW signal to the demo board
LOin port.
5. Set the Signal Generator #2 to provide a 1230MHz, -10dBm, CW signal to the demo board
RFin port.
6. Set the Spectrum Analyzer’s center frequency to 570MHz. Perform mixer conversion gain,
and 1dB compression measurements.
7. Set the Spectrum Analyzer’s center frequency to 1800MHz. Perform mixer LO to IF
leakage measurement.
SPECTRUM
ANALYZER
SIGNAL
GENERATOR 1
SIGNAL
GENERATOR 2
POWER SUPPLY
Figure 2. Test Set-Up for Mixer Single-Tone Measurements.