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Testing of Transmitter
3-16
Figure 3−12. FSK Output From Transmitter
Note:
This is FSK modulation with f1 equal to 915.0 MHz, f2 equal to 915.10-MHz and 100-Hz data rate.
The f1 frequency is the 0 frequency. The f2 frequency is the 1 frequency.
Figure 3−13. Block Diagram for Testing of the TRF4900 EVM Transmitter Section With an
External Pulse Generator
J1
PC With
TRF4900 Software
Installed
PC Printer
(LPT1 or LPT2)
Power
Supply
Cable DB25M to DB25F
P1
DB25M
(Male)
TRF4900
Evaluation
Board
Spectrum Analyzer
TXDATA TP
GND TP
Coaxial Cable With
Clip Lead Ends
Pulse
Generator
Pulse Generator Output Waveform
3 V
1 kHz
Содержание TRF4900
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