Glossary
Hew Lines VA7HU
Daily geomagnetic conditions are summarized in an A index that corresponds to daily K index values.
American National Standard Code for Information Interchange (ASCII)
The ASCII character set is used in data processing and communications systems. It uses seven bits to represent letters, figures and control characters.
G_1
A digital communications protocol using time diversity.
Baud
A measure of how fast individual signal elements could be transmitted serially through a system. Note: It is not the same as Bits per Second bps.
A default callsign to be used by Logger32 must be entered as part of the Initial Setup process. Additional callsigns for other operators may also be entered.
Time zone of the Zero (0) or Greenwich meridian. Sometimes referred to as GMT or Zulu.
A nine-pin connector used to connect to computer Serial (COM) ports.
G_2
DB-25
A 25-pin connector used to connect to computer Serial (COM) and Parallel (LPT) ports.
G_3
Finite Impulse Response Filter
The most basic architecture for digital signal processing. It periodically samples the input data stream, multiplies the sample data by specific coefficients, and sums the results to make the output.
Gaussian Minimum Shift Keying
A type of continuous phase frequency-shift keying. The baseband modulation is generated by starting with a bit stream 0/1 and a bit-clock giving a time slice for each bit.
Greenwich Mean Time
A standard time zone that corresponds to UTC and ZULU times.
Grid Squares are used as an indication of a location based on the "Maidenhead" system of identifying a location within a "square on the earth's surface" based on Latitude and Longitude and identified by six characters (two capital letters, two digits, and another two lower case letters). The first two letters Identify a 20 degree by 10 degree "field", followed by two digits designating a 2 degree by 1 degree "square" within that field. The last two characters are normally not always used. This location methodology is used in almost all VHF contacts and contests.
A digital communications protocol that provides an improved communication capability for the HF bands and increased throughput.
Digital communication mode invented by Dr. Rudolf Hell in 1929.
Callbook lookup
Hot Keys
Keys that may be assigned to programmable buttons to be used to execute that buttons functionality.
An award issued by the Radio Society of Great Britain in recognition of confirmed contacts with the required number of islands/countries since 1 Dec, 1964. Contact the RSGB for further details.
The K index provides an indication of magnetic activity during the previous three hours on a finite scale of 0-9. Very quiet conditions are reported as 0 or 1, while geomagnetic storm levels begin at 4. Also see the A Index.
A set of six orbital element numbers used to define and compute satellite orbital motions. Complete details can be found in the ARRL Handbook. One source of this data is www.celestrak.com/NORAD/elements/amateur.txt
A set of commands that can be used, along with plain text, to create limited routines or shortcuts assigned to the programmable buttons of the Sound Card Data window, Data Terminal window and CW Machine.
Multi-Tone digital communication mode developed by SP9VRC. It is intended as a conversational mode between two or more hams. It uses 64 tones spaced 15.625 Hz apart, in the 1 kHz bandwidth and uses FEC error correction.
Multibyte Character Set
Multibyte character sets are an alternative to Unicode for supporting character sets, like Japanese and Chinese, which cannot be represented in a single byte.
MMTTY
An RTTY encoding/decoding program developed by JE3HHT whose main engine is used by Logger32 to operate RTTY.
Data Engine written by Makoto Mori - JE3HHT
Digital communication mode that dynamically adapts to conditions. PACTOR can accept a series of imperfect or incomplete data segments and "intelligently" attempt to reassemble them into a solid group.
Parallel Port
The standard I/O ports of PCs that are normally used to connect to a local printer, normally identified as LPT1 and LPT2. The standard hardware connector on the PC used for the Parallel Port is a female DB-25.
Programmable Buttons
There are 36 buttons available in the Soundcard Data Window, Data Terminal window and the CW Machine that are user-programmable using Logger32 MACRO commands, plain text, Hot Keys and color. These buttons are available in three sets of 12.
RS-232
The EIA-232-D (commonly referred to as RS-232) standard defines a system used to send data over relatively long distances. It is commonly used to send data anywhere from a few feet to 50 feet or more. The standard specifies the physical connection and signal lines.
The standard I/O ports of PCs that are normally used to connect to a serial device (modem, TNC or radio), normally identified as COM1 to COM4. The standard hardware connectors on the PC used for the Serial Ports are male DB-9 or DB-25 connectors. Logger32 also supports the use of USB to Serial adaptors. See the Setup Radio Control section for details for determining the COM port number.
A measure of solar flare activity on the surface of the sun.
Terminator
The terminator is the boundary between day and night. Its position changes during the day (it makes a complete circuit around the Earth in one day), and it also changes during the year. Daylight is longer in the northern hemisphere than in the southern hemisphere from about March 21 to September 21, and daylight is longer in the southern than in the northern hemisphere during the rest of the year. The terminator, more or less, divides the Earth into halves; facing the sun and facing away from the sun. Logger32 also displays the Twilight Terminator, defining a Twilight Zone. These terminators are displayed in three different modes.
A digital mode decoding and terminal program that uses no terminal unit, terminal node controller, or multimode hardware. It does all of its decoding using the sound card inside the computer, and it can interface with a radio using a COM port. Zakanaka is an extremely cost-effective way of operating PSK31 and RTTY.