Main Program Screen - Texas Instruments TRF6900 User Manual

3.6.2 Software Programming for Receiver Testing
Set up the main program screen and the chip layout screen as shown in
Figure 3–16 and Figure 3–17.
Figure 3–16. Main Program Screen
When Word Bits are Displayed in Red, the Send Words Now (F12) Button Must Be Pressed for
Note:
The receiver frequency of the TRF6900 is 915.000 MHz. The TRF6900 is us-
ing a 10.7-MHz IF frequency. Therefore, the local oscillator (LO) is set to a
frequency of 904.30 MHz.
LO frequency = RF frequency – IF Frequency (904.30 = 915.000 – 10.7)
The desired frequency block of the TRF6900 software control program is
used to set the internal VCO frequency of the TRF6900. (See block diagram)
Testing of the Receiver
Transmit Frequency for Transmit Mode or
LO Frequency for Receive Mode
Changes to Be Updated
Software User's Guide