Southern Avionics Company SD100 Manual Do Utilizador
SD SERIES TRANSMITTER
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SOUTHERN AVIONICS COMPANY
General Description: SD100
This non-directional beacon is an Amplitude Modulated transmitter with an adjustable output power from 5 to 100
watts. The transmitter uses switching technology in the power amplifiers and modulator / regulator modules resulting
in a highly efficient system, in a small package.
watts. The transmitter uses switching technology in the power amplifiers and modulator / regulator modules resulting
in a highly efficient system, in a small package.
The exciter portion consists of an embedded 32-bit micro controller, an I/O interface circuit, an A/D converter, a
monitor circuitry, and an optional voice processing circuitry in a single 3U enclosure. The controller has one "stored"
non-volatile memory, redundant RF DDS (Direct Digital Synthesizer), redundant AF (Tone) DDS, and two serial
ports (local and remote). Settings for ID mode, ID code, ID rate, sequence of operation and other parameters are set
by an user interface program. Simple controls such as power adjustment, percent modulation, and side transfer are
available locally for technical setup. Also for convenience, PA voltage, PA current, PA temperature, RF frequency,
Tone frequency, Carrier power and percent modulation are displayed locally via 7-segment readouts. A simple switch
disables remote control operation during local technical service.
monitor circuitry, and an optional voice processing circuitry in a single 3U enclosure. The controller has one "stored"
non-volatile memory, redundant RF DDS (Direct Digital Synthesizer), redundant AF (Tone) DDS, and two serial
ports (local and remote). Settings for ID mode, ID code, ID rate, sequence of operation and other parameters are set
by an user interface program. Simple controls such as power adjustment, percent modulation, and side transfer are
available locally for technical setup. Also for convenience, PA voltage, PA current, PA temperature, RF frequency,
Tone frequency, Carrier power and percent modulation are displayed locally via 7-segment readouts. A simple switch
disables remote control operation during local technical service.
The power portion of each transmitter consists of two independent 100 watts systems. Each system has an output
filter, a switching power amplifier and switching modulator / regulator, power supply, and an optional battery supply.
filter, a switching power amplifier and switching modulator / regulator, power supply, and an optional battery supply.
The SD100 Dual consists of two independent SD100 transmitters and a Digitally Controlled Automatic Transfer unit
housed in a single cabinet designed for outdoor use.
housed in a single cabinet designed for outdoor use.
Transmitter: Model SD100
Qualifications: Meets applicable requirements of ICAO, FCC, FAA, Transport Canada, UK CAA, EC (emissions
and safety standards).
Frequency Range: 190-1800 kHz, selectable in 500 Hz increments, stability better than .005% (-40(C to +70(C).
Power Output: Digitally generated carrier power into 50 ohms continuously adjustable 5 to 100 watts.
Spurious Emission: Radiated harmonics (measured at a dummy antenna) are more than 63 dB below the 100-watt
carrier.
Type of Emission: NON, A2A, A3E (Optional), GID (with optional GPS beacon modulator), or any combination.
Modulation: Digital generated typically 400 or 1020 Hz.
Noise and Hum Level: More than 40 dB below the carrier level.
Input Power: 115/230V (15%, single phase 50-60 Hz. 24 VDC.
Efficiency: Better than 70% overall efficiency AC input to RF output at 100-watt carrier and tone keying at 95%
modulation.
Numeric Digital Display Meters: Power output, reflected power, PA voltage, PA current, percent modulation, audio
input level.
Keyer: Any combination of Morse code letters or numerals with any user set values pertaining to the length of dots
and dashes, the time between them and the number of repetitions of the identification code per minute (character
length dependent).
Circuit Protection: Open and short circuit proof and immune to damage that can be cause by improper antenna
loads. Individual fuses are used to protect the AC and DC circuits and immune to severe damage caused by improper
installation. VSWR circuit that shuts down the transmitter if VSWR exceeds an adjustable value. Over temperature
and standby shutdown.
Working Conditions: Continuous unattended operation in the following environments: ambient temperature, -40(C
to +70(C; relative humidity, 0-100%; high salinity as encountered in offshore conditions. IP66. Cooling by heat
sinks with no fans.
Qualifications: Meets applicable requirements of ICAO, FCC, FAA, Transport Canada, UK CAA, EC (emissions
and safety standards).
Frequency Range: 190-1800 kHz, selectable in 500 Hz increments, stability better than .005% (-40(C to +70(C).
Power Output: Digitally generated carrier power into 50 ohms continuously adjustable 5 to 100 watts.
Spurious Emission: Radiated harmonics (measured at a dummy antenna) are more than 63 dB below the 100-watt
carrier.
Type of Emission: NON, A2A, A3E (Optional), GID (with optional GPS beacon modulator), or any combination.
Modulation: Digital generated typically 400 or 1020 Hz.
Noise and Hum Level: More than 40 dB below the carrier level.
Input Power: 115/230V (15%, single phase 50-60 Hz. 24 VDC.
Efficiency: Better than 70% overall efficiency AC input to RF output at 100-watt carrier and tone keying at 95%
modulation.
Numeric Digital Display Meters: Power output, reflected power, PA voltage, PA current, percent modulation, audio
input level.
Keyer: Any combination of Morse code letters or numerals with any user set values pertaining to the length of dots
and dashes, the time between them and the number of repetitions of the identification code per minute (character
length dependent).
Circuit Protection: Open and short circuit proof and immune to damage that can be cause by improper antenna
loads. Individual fuses are used to protect the AC and DC circuits and immune to severe damage caused by improper
installation. VSWR circuit that shuts down the transmitter if VSWR exceeds an adjustable value. Over temperature
and standby shutdown.
Working Conditions: Continuous unattended operation in the following environments: ambient temperature, -40(C
to +70(C; relative humidity, 0-100%; high salinity as encountered in offshore conditions. IP66. Cooling by heat
sinks with no fans.