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Main Program Screen
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Slicer:
Click inside the box to turn the data slicer on or off.
SLCTL:
Click inside the box to select between Learn and Hold
modes. This will only work when the data slicer is on.
LPF:
Click inside the box to turn LPF on or off.
DSW:
Click inside the box to select between LIM and RSSI.
This changes the position of the data switch inside the
TRF6900. The data switch selects between the output of
RSSI and FM/FSK demodulator (LIM) as the input to the
LPF amplifier. (See block diagram in Figure 1–1)
RSSI:
Click inside the box to turn RSSI on or off.
LIM:
Click inside the box to turn LIM (second IF amp/limiter)
on or off.
IF:
Click inside the box to turn the first IF amplifier on or off.
MIX:
Click inside the box to turn the RF mixer on or off.
LNA:
Click the arrow beside the box to turn LNA off, set to High
Gain mode, or set to Low Gain mode.
Output Parameters
Enable:
Click inside the box to turn the TRF6900 on or off.
TXData:
Click inside the box to switch the TXData line between
high or low.
Mode:
Click inside the box to switch the mode line between 0
and 1.
Clock Width:
Type inside the box to increase or decrease the clock
pulse width. (This should not be changed during normal
use)
Strobe Width:
Type inside the box to increase or decrease the strobe
pulse width. (This should not be changed during normal
use)
PLL and MM Options
APLL:
Use arrows on side of box to select between values of 0,
20, 40, 60, 80, 100, 120, and 140.
NPLL:
Click inside of the box to change the divide-by-N value
between 256 and 512. The value of PreScaler under
Synthesizer changes when the NPLL value changes.
MM:
Modulation mode is fixed to FSK modulation mode.
LPT Port
LPT_x:
Click inside the box to chose between PC parallel ports
LPT 1 or LPT 2.
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