PACTOR is a radio modulation mode used by amateur radio operators, marine radio stations, military or government users such as the United States Department of Homeland Security, and radio stations in isolated areas to send and receive digital information via radio. [citation needed]

PACTOR can be viewed as a combination of two earlier digital modes, packet radio and AMateur Teleprinting Over Radio (AMTOR). PACTOR provides improved throughput because its transmission speed adapts to the quality of the link and it uses Huffman compressed characters.

PACTOR-4, with its 10 speed levels and adaptive equalizer, adjusts itself ideally to varying channel conditions, and guarantees reliable data transfer even under very poor propagation conditions.

LATEST NEWS Rev: 30-MAR-2024 PACTOR AND 2024 Yes, PACTOR is still around in 2024. Recently the FCC has allowed PACTOR-4 to invade the US Ham Bands. What does this mean? Frankly .. a degradation of narrowband digital activity. You see PACTOR-4 will override a narrower bandwidth signal.

Nov 25, 2021 · PACTOR-I is a digital data protocol combining elements of PACKET and AMTOR ARQ. PACTOR-I is used by many groups, including Sailmail for mariners to send and receive emails.

PACTOR-4 (P4) is designed for superior performance under adverse multipath channel conditions. The demodulator utilizes a powerful adaptive equalizer compensating for channel distortions.

PACTOR-III is a software upgrade for existing PACTOR-II modems that provides a new data transmission mode for improved speed and robustness. PACTOR-III is not a new modem or hardware device.

PACTOR-II is a fully backward-compatible improvement to the original PACTOR system. It is an adaptive mode that applies different modulation and encoding methods depending on the channel quality. PACTOR-II performs its initial link setup using PACTOR in order to achieve compatibility.

Use this GROUP to post your PACTOR, RPR or PACKET SKEDS/CQ CALLS using your Center Frequency (CF) which is the CENTER between MARK and SPACE in P1, P2, AMTOR or PACKET), and/or post a message to the group.

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