STANAG 4539 Transmitter

 

Availability

 

SkySweeper STD : NO

SkySweeper STD+ : YES

SkySweeper PRO : YES

 

General Description

STANAG4539 (also known as MIL-STD-188-110 and FED-STD-1052) transmitter supports the speeds from 75 baud to 2400 baud. The 75 baud mode is the frequency hopping mode all the others are fixed frequency modes. With the 'Config' button you can configure transmission mode, magnitude & frequency. With ‘Load’ you can load the text to be transmitted from a file. ‘Start/Stop’ starts and stops the transmission. When the characters are transmitted the Red text ‘Transmitting’ is shown in the dialog. If the Yellow text ‘Ready to Transmit’ is shown, you should press the Green button in the Configuration Editor to start the transmission. With ‘Reset’ you can reset the transmitter. The STANAG4539 transmitter shows the currently transmitted character block as inverted text. Transmission is always started from the cursor position.

 

Configuration

Pressing the ‘Config’ button opens the following Configuration dialog box.

 

 

 

 

Parameters

Mode

With this parameter you can select the transmitted mode (speed 75-2400 baud).

Interleaver

This selects the used interleaver (short/long)

Carrier

This selects the carrier frequency 1500/1800 Hz. 1800Hz is standard and 1500 HZ should be used only in special cases.

Modem ASCII Settings

The ASCII mode is configured here:

- number of ASCII data bits (7 or 8)

- parity bit (None, Even, Odd)

- Number of start bits (0 or 1)

- Number of stop bits (0,1 or 2)

 

Typically STANAG modem uses 7N1 (1 start bit, 7 ASCII data bits, no parity, 1 stop bit) or 8N1 (1 start bit, 8 ASCII data bits, no parity, 1 stop bit) formats.

Magnitude

With this you can set the magnitude (maximum amplitude) of the transmitted signal. The amplitude value is set as an absolute value. When 16-bit processing is used the maximum magnitude will be 32767. If 8-bit processing is used the maximum is 127.

Clock Correction

This used to compensate the sound card clock error. Value 1 means no compensation. It is recommended to use this compensation for STANAG instead of system level clock correction.

 

Sum to RX

If this switch is selected, the TX signal is added to the block’s input signal. Otherwise, the input signal is muted.

Repeat

When this switch is selected, the same picture will be transmitted again and again until this switch is deselected or the transmission is stopped.

 

Load

The ‘Load’ button is used to open a bitmap image into the transmission window.

Start

The ‘Start’ button starts transmission from the beginning of the picture. It is not possible to edit the picture when transmitting. Transmission can be stopped at any time by pressing the ‘Stop’ button. If the TX control signal is enabled start and stop button sets the signal on and off.

Reset

The ‘Reset’ button clears the transmission window and resets the transmitter.