Timewave's Powerful DSP Technology
Improves the PK-900!
Timewave's customers swear by their DSP filters and PK-900
owners love the flexibility and reliability of the best data
controller ever built. The PK-900/DSP rolls it all into one!
The PK-900/DSP daughter board brings a new level of performance
to the powerful PK-900 with sharp, accurate filters for the HF
data modes. Noise and QRM bounce off the new filters for cleaner
copy with fewer errors than the old analog filters. Weak signals
magically appear from the noise.
More Filters, Better Filters, Automatic
The PK-900 was designed in 1991 before the advent of affordable
DSP technology. The filters in today's analog TNC's were state-of-the
art in 1991, but they pale beside the performance of DSP filters.
(We know a bit about RTTY/Data filters - old and new. Timewave
built a DSP Terminal Unit for the U.S. Navy in 1988, before most
amateur radio companies could even spell DSP! Unfortunately,
$3000 for a TU was a little high for the average ham, so we put
DSP on hold for the ham market until 1993).
The PK-900/DSP brickwall filters have tighter bandwidth and
steeper skirts for improved noise and QRM rejection. A new version
of the PK-900 firmware (Ver. 7.2) allows a wider selection of
filters than the original PK-900, so the filter can match the
mode. The correct DSP filter is automatically selected when you
choose a new mode. In RTTY, Timewave's proven Twin Peak filters
pluck the mark and space tones from the noise and QRM for great
copy. In Pactor, the filter bandwidth automatically changes when
the baud rate shifts in response to the error rate of the link.
The tight AMTOR filter speeds data throughput in poor conditions
when some other multimodes can't even establish or hold a link.
In Morse (CW), the operator can select 50, 100 Hz or 200 Hz bandwidth.
The PK-900/DSP operates with all existing software terminal
programs for the PK-900, except for selection of CW bandwidth
via host mode of the terminal program. The CW bandwidth can be
selected manually in the Command mode with any dumb terminal
program. Timewave's new PK-Term'99
for Windows 95/98/NT supports the new CW bandwidth selection
in the Host mode.
Installation in the PK-900 is easy. It's as simple
as unplugging two IC's, plugging in the daughterboard, soldering
four connections, and clipping a couple of component leads. The
upgrade comes with complete instructions, in addition to Timewave's
on-line and telephone support. Dealer and factory installation
is also available.
All Proven Modes
The PK-900/DSP upgrade supports the following PK-900 Radio Port
1 modes - PACTOR, AMTOR/SITOR, Baudot, ASCII, Morse, Packet,
HF Weather FAX, TDM, and NAVTEX. The DSP upgrade is completely
compatible with installed or new 9600 Baud upgrades and does
not affect the operation of the Radio Port 2 packet modes.
||A/D - D/A
|| Digital Signal Processor
||Analog Devices ADSP2184
|| 3.5" x 5.2"
Upgrade Prices and Ordering Information
- Digital Signal Processor
- 16 Bit A/D-D/A
- 42 Optimum DSP Filters
- Twin Peak RTTY Filters
- Adaptive PACTOR filters
- 50, 100 200 Hz CW Filter
- Automatic Operation
- All standard modes