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3.2.6
Help
Gives a brief description of each control box. For example, clicking on the PLL
box in the Mode Options section on the main program screen, the Help box
will read:
Most of the other control boxes follow this format. The first line indicates what
portion of the TRF6900 is being controlled. The next two lines indicate the bit
value. If the PLL is off, bit 12 of Words C and D are equal to 0. If it is on, bit 12
is equal to 1. The last line indicates this control works in both Mode 0 and Mode
1.
Double clicking in the Help box on the main program screen, activates the chip
layout screen.
3.2.7
Words
This section updates the binary words after changes are made to the control
options. Clicking on the box next to the word can individually send each word.
Clicking on the Send Words Now (F12) button on the main program screen or
by pressing F12 on the keyboard, sends all the words to the TRF6900.
3.2.8
Operation Mode
Operation Mode shows if the TRF6900 is enabled, which mode (0 or 1) is se-
lected, and if the transmit (TX) data line is on or off.
3.2.9
Changing Values on the Main Program Screen
-
-
Phase-Lock Loop
0: Off
1: On
Valid in Mode 0 or 1.
Synthesizer Section
CLK:
Type the desired clock frequency inside the box or use
the arrows located at the right side of the box.
Desired Freq.: Type the desired transmit or LO receive frequency inside
the box or use the arrows located at the right side of the
box.
PreScaler:
Click inside the box to change divide-by-N value be-
tween 256 and 512. The value of NPLL under PLL and
MM Options changes when the PreScaler value
changes.
Mode Options
PLL:
Click inside the box to turn the PLL on or off. (Turn on for
transmit or receive.)
VCO:
The VCO is always on. Clicking has no effect.
Pwr Amp:
Use the arrow at the side of the box to select the desired
power amplifier attenuation.
Main Program Screen
Software User's Guide
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