DC1513B-AB

DEMO MANUAL DC1513B LTM9004 14-Bit Direct Conversion Receiver Subsystem DESCRIPTION Demonstration circuit 1513 is an evaluation board featuring acquisition demo board and the output can be easily ana- Linear Technology Corporations LTM 9004 14-bit direct lyzed with Linear Technologys PScope data processing conversion receiver subsystem. DC1513 demonstrates software, which is available for no charge on our website at good circuit layout techniques and recommended external DEMO MANUAL DC1513B QUICK START PROCEDURE 3. Apply an RF input signal to the board. For best results, 5. Observe the ADC output with demo circuit DC890B, a USB use a low distortion, low noise signal generator with cable, a Windows computer, and Linear Technologys sufficient filtering to avoid degrading the performance PScope data processing software. of the receiver. 4. Apply an LO input signal to the board. Note that the difference in frequency between this signal and the RF signal will be the IF frequency resulting at the IF filter and ADC input. POWER SUPPLY (5V AT 0.5A, 3V AT 1A) NOTE: EVEN A HIGH QUALITY SIGNAL SYNTHESIZER WILL STILL HAVE NOISE AND HARMONICS THAT SHOULD BE ATTENUATED WITH A LOWPASS OR BANDPASS FILTER. FOR GOOD QUALITY HIGH ORDER FILTERS, SEE TTE, LARK ENGINEERING, OR EQUIVALENT. SIGNAL GENERATOR BPF HP 8644B OR EQUIVALENT TO DC890 SIGNAL GENERATOR BPF HP 8644B OR EQUIVALENT RF SIGNAL GENERATOR (HP 8644B) OR OTHER BPF LOW PHASE NOISE CLOCK SOURCE (e.g. DC1216) Figure 1. Proper Measurement Equipment Setup dc1513bf 2