For P4, as with PACTOR-3, short and long packets are used to ensure the best possible compromise between time quantization ("response time" with many changes of direction in the half-duplex channel) and overhead / idle times. The "normal" ARQ cycle time for P4 is 1.25 s (short cycles) or 3 * 1.25 s (long cycles). In
I used PA0NC program NcWinPtc for multimode, and then used AirMail for WinLink operation on HF and packet on V-Uhf. Pactor lev.2 is something to test; I had in the last month other Multimode Pactor controllers to fix, but when you are used to Pactor level 2, going back to pactor 1 links seems pure frustration and masochism .
This DSP Multimode PACTOR CONTROLLER is "like new". stored inside, no corrosion etc. Made in Germany by SCS. Asking $275 with shipping in Cont USA. This …
The standard cycle duration for PACTOR-II is the same 1.25 s used by PACTOR, with the same 0.17s idle time (for propagation delay), to maintain interoperability. Since PACTOR-II uses a longer CS of 0.28 s (instead of PACTORs 0.12 s), the packet length had to be shortened to 0.8 s (from PACTORs 0.96 s).
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DR78 00 - P4dragon SCS Pactor Modem (more details). NEW PRICE REDUCTION. Our HF modem P4dragon DR-7800 is the uncompromising advancement of the legendary PTC-II which is designed for professional …
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I have two SCS PTC-II pro modems for sale. $635 each plus $15 shipping (each). Modem Serial Numbers (just the last 9 Characters) -- E851207EB and. -- CD7D82B9. Both are …
In order to run PACTOR with the 6000 series radios there are a couple of things that have to be in place: 1. The slice used for PACTOR must be in DIGU or DIGL with a filter wider than 3k. This will make SmartSDR use lower latency filters to decrease turnaround time. 2. Make sure the audio levels are set properly.
Combine this radio with the SCS Pactor modem, and world-wide e-mail is a reality. If you are contemplating the purchase of an SSB transceiver, the Icom IC-M802 is worthy of consideration. ... This is a receive-only circuit and any 50-Ohm marine coax cable such as the smaller diameter RG-58U can be used. Simply terminate the coax on a …
PACTOR is a synchronous transmission system with a packet duration of 0.96 second, a CS duration of 0.12 second, and an idle time of 0.17 second for a total cycle time of 1.25 …
This cable is used to connect the Pactor Modem to the RS-232 () remote control of your transceiver. Call to Purchase. 8083 - Transceiver Remote Control Cable RS232 with Gender Changer.
PACTOR. PACTOR is a hybrid of Packet and AMTOR. Designed by Peter, DL6MAA and Ulrich, DF4KV is an alternative to both AMTOR and packet. It has three incarnations, PACTOR I, PACTOR II and PACTOR III. These …
The PACTOR-III Protocol Technical Description by Hans-Peter Helfert and Thomas Rink SCS & Co. KG, Hanau, Germany 1. Introduction ... 120 Hz is used in optimum propagation conditions. The highest raw bit rate transferred on the physical protocol layer is 3600 bits/second, corresponding to a net user data rate of 2722.1 ...
channels are based on the well-documented Watterson model3 used in many expensive laboratory grade instruments. For HF, both wideband modes (PACTOR 3, PACTOR 4, VARA, ARDOP and WINMOR) and 500Hz modes (PACTOR 2, ARDOP 500, WINMOR 500 and an all new VARA 500 mode) were tested. For VHF, AX.25 based packet, FX.25 …
Our HF modem P4dragon DR-7800 is the uncompromising advancement of the legendary PTC-II which is designed for professional deployment and for the ambitious amateur radio operator. DR-7800 is software-compatible with PTC-II which means that one may continue to use the existing software, such as AirMail, RMS Express, Alpha, etc., for PACTOR as …
This change opens up the ability to use PACTOR-4 protocols for higher speed data transmission on Amateur radio bands. Something Marine bands already supported. Previously the symbol/baud rate rule limited speeds on Amateur bands to PACTOR-3. PACTOR-4 is roughly 2X the speed and PACTOR-4 modems also have …
Compatibility: Backward compatible to PACTOR-1/-2/-3. Automatic negotiation during link setup. Noticeably improved performance with PACTOR 2 and PACTOR 3. ARQ protocol: Synchronized, similar to PACTOR 3, except 10 instead of 6 speed levels ("Waveforms") and faster switching. Bandwidth is always smaller than 2400 Hz.
Use the Pactor modems to send wireless e-mail, transfer files, use real-time data links, and access weather information, all over your SSB or VHF radio.. The compact HF modem P4dragon DR-7400 offers a lower-priced entry to the P4dragon modem class. The DR-7400 has been optimized for use with the new high-end data transmission mode PACTOR …
I just ordered the PACTOR-3 license and a PR-Modul DSP-II board - they still sell it! If you get a barebone PTC-II for $100 or less, don't hesitate. But be prepared to shell out another $200 for PACTOR-3. ... My use of the SCS has been intermittent but with support from Gary have used Airmail from time to time with success. Thanks to a recent ...
The fast quad-core DSP used in the DR-7X00 modems enables for the very first time, a high data rate, approaching very close to the Shannon limit, as well as an extremely high immunity to interference. ... PACTOR-4, with its 10 speed levels and adaptive equalizer, adjusts itself ideally to varying channel conditions, and guarantees reliable data ...
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To make up for this, an antenna tuner is used to electrically balance the antenna and the radio transmitting unit's output, ensuring maximum power is sent to the airwaves. ... The ONLY radio modems worth buying are made by a company called PACTOR, which has a virtual monopoly on the technology. Their latest model, the P4 …
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"For a number of years hams who've accessed the Winlink network on the HF bands have used PACTOR, primarily PACTOR II or III. This required the purchase of an external hardware modem. This required the purchase of an external hardware modem.
Our HF modem P4dragon DR-7800 is the uncompromising advancement of the legendary PTC-II which is designed for professional deployment and for the ambitious amateur radio operator. DR-7800 is software-compatible with PTC-II which means that one may continue to use the existing software, such as AirMail, RMS Express, Alpha, etc., for PACTOR as …
SCS model numbers and pactor modes are confusing. Current modems in production are the PTC-IIIusb and the P4dragon, and are recommended. Any previous PTC-II, IIe, IIex, IIpro, or IIusb modem can be licensed to use the Pactor-III protocol for a fee (paid to an SCS dealer or to SCS, not to SailMail) but can't be used for P4.
The DR-7800 P4Dragon is optimized to use the data transmission mode PACTOR 4. The DR-7800 and PACTOR 4 enable unexcelled data links via shortwave from any point on earth. P4Dragon modems are software compatible with previous PTC-II series modems, so existing PACTOR software (AirMail, RMS Express, Alpha etc) can continue to be used.
Special importance was given during the development of PACTOR-4 that this could be used without problem on industry standard transceivers with a 2.4 kHz IF bandwidth ("amateur radio transceiver"). Due to the adaptive equalizer, the form of the IF filter curve (as compared against OFDM, PACTOR-3) is non critical. ...
The Ethernet interface is used to connect the DR-7800 to a local network of computers, for example to give each computer access to the Pactor modem. With the software upgrade to version 2.0, the P4dragon controller now also handles …
Under very poor conditions PACTOR-III changes to speed level 1, whereas, under optimum conditions, speed level 6 is used. As in the previous PACTOR standards, the frame durations are still 1.25 seconds (short cycle) and 3.75 seconds (long cycle for data mode). Again, a long path option is available to enable contacts up to 40.000 km. In such a ...
PACTOR is a radio modulation mode used to send and receive digital information via radio. PACTOR radio equipment consists of an HF transceiver, a computer and a terminal node controller. Software running on the computer drives the terminal node controller. The calling modem uses the PACTOR-I FSK connect frame to be compatible with the lowest level.
The 9090 cable used on most Icom radios for the "ACC" connector cannot be used. The audio level settings should be 900/1200 for FSK/PSK respectively. ... We support Pactor-4 at all stations but expect that Pactor III mode will continue to be used by most SailMail members because of the significantly lower cost of the modem. But for those ...
PACTOR is used by some amateur radio bulletin boards. It is also commonly used for transferring data, including email, from marine stations. Techopedia Explains PACTOR. As a form of AMTOR, PACTOR evolved from an original radio teletype technology that simulated an electromechanical teletype for wireless transmission.