X-45C1-01-30 Rev 1
5
6) Set Frequency
This feature allows the user to set the transceiver frequency to any of three
points. The unit will initially be set to the center of the radio band (
Mid Freq.
)
upon power-up. The current frequency will be displayed on a status line near
the bottom of the display whenever this item is selected. Pressing the
Enter
soft
key causes the frequency to switch to the next frequency. The
Set Frequency
function may be used while the unit is in any of the above modes (Receive,
Transmit, Normal, etc.).
J. Radio Menu
The Radio Menu contains all of the software-adjustable parameters related to the
data radio and radio communication. This screen is only accessible in special in-
house firmware builds and is not available to the end user. The Radio Menu is shown
in Figure 10 below.
Figure 10. Radio Menu
1) Adjust Pot
This adjustment controls the DC bias that is applied to receive data signal
(from the transceiver) before it enters the threshold detector. Typical
adjustment procedures involve injecting a very low-level, modulated signal into
the receiver and adjusting this control for minimum bit error rate.
2) Adjust Flatness
This function may be used to adjust modulation flatness. This alignment is
typically performed by monitoring the modulated signal on spectrum analyzer
