Fsk Output From Transmitter; Block Diagram For Testing Of The Trf4900 Evm Transmitter Section With An External Pulse Generator - Texas Instruments TRF4900 User Manual

Testing of Transmitter
Figure 3−12. FSK Output From Transmitter
Note: This is FSK modulation with f 1 equal to 915.0 MHz, f 2 equal to 915.10-MHz and 100-Hz data rate.
The f 1 frequency is the 0 frequency. The f 2 frequency is the 1 frequency.
Figure 3−13. Block Diagram for Testing of the TRF4900 EVM Transmitter Section With an
External Pulse Generator
PC With
TRF4900 Software
Installed
Cable DB25M to DB25F
1 kHz
3 V
Pulse Generator Output Waveform
3-16
PC Printer
(LPT1 or LPT2)
Power
Supply
P1 TRF4900
DB25M Evaluation
(Male) Board
Pulse
Generator
J1
Spectrum Analyzer
TXDATA TP
GND TP
Coaxial Cable With
Clip Lead Ends