Hello to all testers, I have issued a new test version of Multipsk.
It contains the Multipsk test version, help files and a CW interface diagram: http://f6cte.free.fr/MULTIPSK_TEST_04_04_2009.ZIP Paste this adress in your Internet Explorer or equivalent. Download the file. Create a tempory folder (C:\TEST, for example), unzip the file in it and start C:\TEST\Multipsk.exe (the auxiliary files will be created automatically). After the first comments, I have modified the switch between FSK and PSK Packet and I have removed the limitation on ALE/ALE400 scanning (useful for the ALE400 tests in progress). Attention, it is advised against the clicks of the transceiver relays. Normally the transceiver must scan without any clicks of the relays. If they click, try to work in "Split mode" ("Options" window). If they keep on clicking, it is advised not to scan. Note: Multipsk scan through Commander (DXLab) or HRD. 73 Patrick ----- Original Message ----- From: Patrick Lindecker To: multi...@yahoogroups.com ; multipsk_t...@yahoogroups.com Sent: Saturday, April 04, 2009 1:24 AM Subject: [multipsk] New test version of Multipsk: BPSK1200 Packet (for satellite) + CW Keyer Hello all testers, I have issued a new test version of Multipsk. It contains the Multipsk test version, help files and a CW interface diagram: http://f6cte.free.fr/MULTIPSK_TEST_03_04_2009.ZIP Paste this adress in your Internet Explorer or equivalent. Download the file. Create a tempory folder (C:\TEST, for example), unzip the file in it and start C:\TEST\Multipsk.exe (the auxiliary files will be created automatically). New functions to test (in complement to the Andy's ones on ALE400...) 1) Coding/Decoding of Packet BPSK1200 This mode is used for satellite (as LUSAT LO-19 for example) transmissions in UHF (USB). But it could also be used in VHF (FM ) with a better performance than Packet FSK, in Unproto (APRS) or in connected mode. See specifications further on. It would be interesting for Hams or SWL having the adequate UHF satellite hardware to try to follow satellite BPSK1200 Packet transmissions. In interface with Commander (or HRD), the program can follow (according to my limited tests) a drift of 40 Hz/s, which is normally sufficient for this type of application. Note: it would be also interesting to know if Packet PSK 1200 bauds is really better than Packet FSK 1200 bauds in standard connected mode or APRS (VHF FM). Extract from the help The operator can choose only Packet 1200 bauds for UHF satellite transmissions (JAS-2 FO-29, LUSAT LO-19, UO 14, PACSAT AO-16) in UHF (USB) or classical transmissions in VHF (FM). Available BPSK Packet options These two options are available by clicking on the "Options" button which opens the window "Packet parameters". In the sub-window "BPSK Packet options", it is proposed: By default , in FM ("normal" way to listen BPSK1200), there is no need of any AFC (Automatic Frequency Control), but it is required in USB. a.. option "AFC on AF": by default, this option is unnotched. The automatic frequency control is required in USB (if it is used to get a better signal to noise ratio). In that case, aCe mode est utilisé pour les transmissions Ce mode est utilisé pour les transmissions Ce mode est utilisé pour les transmissions 50 HZ shift of the 1200 Hz AF carrier can be made up, but not beyond, the carrier frequency at 1200 Hz being supposed fixed. b.. option "AFC on HF (satellite)": by default, this option is unnotched. To listen satellite BPSK1200, USB is the normal way to listen. It is proposed an AFC applied to the transceiver HF, through the CAT system, to keep the downlink receiver properly tuned to the BPSK transmission, during a satellite pass 2) Possibility to automatically display the received Locators on Googleearth maps This applies to the standard decoding and to all panoramics (PSK/CW/RTTY). In this case, all Locators received on a 3 KHz bandwidth will be displayed on GoogleEarth. This option is available on the controls part of the world map (button "World"). 3) CW: working in QSK and CW "keyer" The "QSK" button permits to work in QSK (reception between transmitted Morse signs), by leaving the decoding on duty during CW transmission. The "Keyer" button permits to transform Multipsk in a CW generator (automatic dots and dashes), up to 30 wpm. The double-lever Morse key must be connected to the PC through the same serial port as the one selected to switch the transceiver. This works only if the "Yes without sound, for big PC (by timer)" option is selected in the "MODE" window (click on the red button labeled "MODE"). See the CW (RX/TX) interface diagram in the test package and the help about CW. Description of the PSK Packet The PSK Packet at 1200 bauds shares the same characteristics as the FSK Packet at 1200 bauds, except some ones: * the modulation is a DBPSK one (differential binary phase shift keying), as, for example, in PSK31. DBPSK is better that FSK, * bandwidth : about 2000 Hz * Pmean/Ppeak: 0.79 * the lowest S/N is about +6 dB, * very high capacity (up to 40 Hz/sec) to follow a satellite drift (using the Cat system of the transceiver). 73 Patrick
