Robotron Pty Ltd G9P 用户手册
WiNRADiO G39DDC User’s Guide
92
The Notch and Audio filter lengths can also be adjusted using this facility,
resulting in sharper (or shallower) notch and audio filtering, tailored to specific
customer requirements.
Should the computer become sluggish or even “freeze” as a result of this
adjustment, please reduce the respective filter length to a lower value.
Note also that the CPU load can be lowered (while keeping selectivity high) by
reducing the DDC1 bandwidth. For example standard HF and narrow-band FM
signals can be demodulated with 20 kHz DDC1 bandwidth without decrease in
demodulation quality. Wider DDC bandwidths affect display and recording,
while increasing the CPU load considerably.
Front Panel LED
This function is only applicable to the WR-G39DDCe (USB interfaced) model.
Normally, its front panel blue LED flashes with various different patterns which
are useful for installing the receiver and debugging possible interface problems
(see Appendix C).
Normally, its front panel blue LED flashes with various different patterns which
are useful for installing the receiver and debugging possible interface problems
(see Appendix C).
However, as the flashing LED may be disturbing, the behavior of this LED in
its normal "receiver ready" state can be controlled by the user, making it
possible to keep the LED continuously on or off, to suit the user's preference:
its normal "receiver ready" state can be controlled by the user, making it
possible to keep the LED continuously on or off, to suit the user's preference: