NEW! PK-900/DSP Upgrade for the PK-900

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 selection
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.

Easy Installation
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 16 bit
 Digital Signal Processor Analog Devices ADSP2184
 Size  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


To Contact Timewave
US Dealers 651-489-5080
Timewave Technology Inc.
Canadian Dealers
360 Larpenteur Ave. W. STE 100
International Distributors
St. Paul, MN 55113 USA
  © 2007-2022 Timewave Technology, Inc.  All Rights Reserved.