PSK: CIS-3000

CIS-3000

PSK-8, Br-3000.

PSK

The record of this signal is here. Send by RadioKoteg.

Author: SergUA6

Band Width ~3400 Hz

Low Range ~600 Hz, in this example only!

Baud Rate 3000 Hz

n-Ary (PSK/MPSK) PSK-8

Carrier frequency ~2313 Hz, in this example only!

ACF Preamble ~ 85 ms

RX mode SSB

Sonograms

pic.1 Generall view

pic.2 General structure of the signal

Diagrams:

pic.3 8th harmonic

Pictures:

pic. 4 Phase constellation

pic.5 ACF preambles

CIS-3000 - With very high probability this signal has the Russian origin roots. More and more often there are signals which are leaving the limits of standard phone channel. This signal represents that kind of signals. The spectrum of this signal occupies 3400 Hertz. The maximum technical speed 3*3000 = 9000 bps.

SA update to version 6.2.3.0

SA Update to version 6.2.3.0.

Changes has been added in OFDM module operation.

Algorithm of search of a correlative triangle has been also changed. Current implementation of this algorithm successfully enough copes with the short signals.

Function of obtaining of exact value of clock frequency is updated. Now besides obtaining of the clock frequency, the task of obtaining of an optimal position of the signal by frequency is solving. It does automatically translates the triangle in the necessary positive polarity. All that demands some time, so no need to be nervous:-)

Some pauses (till 3-5 seconds) in operation of "Get Br" function are possible, The pauses depend on many factors:

from sampling rate of a signal

from its position on frequency

from the sizes LS and LG etc.

In generall, the program solves wide enough range of tasks in an automatic mode. From the user it is required only to situate the triangle in "a good" position and to call function "Get Br", and it is not important if there will be the positive triangle or negative, the program itself will translate the triangle into the necessary type, through search of optimal shift by frequency.

It is necessary to note that shift by frequency isn't precise because precision isn't necessary, while it is very close to optimal value, from the point of view of the program certainly.

All these changes and additions are preliminary preparation of the module for the decision of the primary task: obtaining LS and LG values of concrete signal, within the limits of our ideas, which were described in the article Parameters of OFDM signals.

Some minor problems had been found out by users and solved by us.

The more detailed information of operation with OFDM signals in version 6.2.3.0 will be described in separate article.

Good luck!

MFSK: WinMor

WinMor, mode 2*MFSK-4

Amateur's mode. Br - 46.875

Here is the record of the signal. Send by JenyaT.

Author: SergUA6

Band Width ~500 Hz

Baud Rate 46.875 Hz

Count of Carriers 4 in one group and 4 in second group

Step between carriers 46.875 in group, 93.75 between groups Hz

RX mode SSB

Sonograms:

pic.1 General view

pic.2 Detaltization. Two groups of MFSK-4

pic.3 Detalization of the groups. Space between the groups.

Diagrams:

pic. 4 Start

pic.5 Start detalization

Pictures:

pic.6 Graphic spectrum of the signal

WinMor, mode 2*MFSK-4 - it is the new amateure mode (atleast it is announced in 2010 year), which had been created by radio amateurs. The protocol has a lot of transmission formats. In the current example of the signal, two MFSK-4 channeles are used. The signal is bright enough, so there shouldn't be problems with it's identification.

SA update to version 6.2.2.8

SA update to version v 6.2.2.8

This is planned updating.

The new element in the general options is added.


Internal management of markers is reconsidered. Appearance and the size of the markers has been changed.

It is problematic enough to surely catch the markers by mouse with the thickness in 3 pixels, on the big monitors. Although it is required not so often, it may cause some inconveniences.

Correct independent work of two and more Phase Plane modules is realized. Some users actively use this possibility, and in old versions it worked not correctly.

We also prepeared the demo clip, which shows how to work with the bottom panel of tools. In this clip, we finish the review of the basic SA working window, and in The further we will countine to make demo clips about work with concrete modules.

All demo clips are recommended to be started on monitors with the permission not less then 1024х768 in mode Normal size 96 DPI.

The list of demo files of own SA format are located in special section of the site => Video examples on use SA.

Good Luck.

SATCOM Satellite, US INTEL - 260.41, UHF (B)PSK-2, Br - 260.41

SATCOM Satellite, US INTEL - 260.41, UHF

(B)PSK-2, Br - 260.41

Here is the signal. Send by RSCAN.

Author: SergUA6

Band Width ~520 Hz

Baud Rate 260.47 Hz in this example, exact value 260.41

n-Ary (PSK/MPSK) (B)PSK-2

ACF ~1900 ms preamble, ~368 ms data/message

RX mode SSB

Sonograms:

pic.1 General view

Diagrams:

pic.2 General structure of the signal

pic.3 Phase constellation

Illustrations:

pic.4 ACF

SATCOM Satellite, US INTEL - 260.41, UHF - is the very wide spread signal, which can be met in the channeles of satellite group SATCOM. This signal is encrypted.

SA update to version 6.2.2.5

SA update to version 6.2.2.5

Automatic synchronization of phase added in FSK-2 dem module.

The presence of two degrees of adjustment (in phase and frequency) for setting/selecting accurate clock for many presents certain difficulties. As miminum the phase synchronization can be achieved fairly quickly and qualitatively, in automatic mode.

This is implemented in the current update.


If the automatic phase is ON(enabled by default) setting the exact value of the clock frequency is greatly simplified. In addition, in most cases, automation will work better and error free.

Nevertheless, the possibility of a transition to a fully manual mode is preserved, sometimes it's necessary.

Automation mode helps to significantly over short and very short signal/fragments.

Algorithm for automatic phasing is not sensitive to the long series of zeros or ones at the beginning of the fragment, it usually is the problem seriously. This situation handled correctly, however, should not take very long series. Also not recommended to take when copying or selection, start part of signal with noise, this can completely disrupt the work of the algorithm.

Although algorithm was developed an for signals FSK-2, he copes with C4FM, which greatly facilitates the identification of this regime and etc.

In general, the automatic phase synchronization, when set properly of clock frequency. Guarantees a correct bitstream and greatly simplifies the module FSK-2 demodulator in SA.

Generally, issues guarantees the correctness of the bitstream is a separate issue, which many prefer to sidestep/not see. :-)

Good Luck!

SA update to version 6.2.2.4

SA update to version 6.2.2.4

Under a 64-bit OS (Vista, W7) are errors in the previous version.

The current version of SA 6.2.2.4 passed rigorous testing, all identified problems are eliminated. This version very stable and sustainable for both 32-bit OS, and 64-bit.

Good Luck.