Robotron Pty Ltd G9P 用户手册
WiNRADiO G39DDC User’s Guide
91
Enable second RX
By default, the second receiver is enabled. If disabled, then only the RX1 tab
remains active and it will not be possible to activate the RX2 tab. This feature
is useful with computers of insufficient processing power to run both receivers
with satisfactory DDC bandwidth and filter selectivity. By deactivating RX2, the
CPU load will be reduced and this additional power will become available for
RX1 which will then be able to achieve a wider DDC bandwidth and/or greater
selectivity.
Filter Length
This facility makes it possible to adjust the digital filter “length” (which directly
translates into selectivity) for three types of filters used in the Excelsior:
remains active and it will not be possible to activate the RX2 tab. This feature
is useful with computers of insufficient processing power to run both receivers
with satisfactory DDC bandwidth and filter selectivity. By deactivating RX2, the
CPU load will be reduced and this additional power will become available for
RX1 which will then be able to achieve a wider DDC bandwidth and/or greater
selectivity.
Filter Length
This facility makes it possible to adjust the digital filter “length” (which directly
translates into selectivity) for three types of filters used in the Excelsior:
The Demodulator filter length has a direct influence upon the overall
receiver selectivity. Greater length gives better selectivity.
The maximum achievable selectivity is limited by the processing power of your
computer: The greater the CPU power, the “longer” (and therefore sharper)
can the filter be made.
This function also makes it possible to observe the CPU load, which will
depend on this setting. It may not be advisable to select a value resulting in
more than say 30% CPU load, as the computer may then become sluggish.