Sea Air and Land Communications 123845 Benutzerhandbuch
SALCOM 12-38 SERIES VHF AND UHF TRANCEIVER
Issue 1238UD 1015
Sea Air and Land Communications Ltd
Page 3
CONNECTIONS
External indicators consist of a power indicator GREEN LED, normally flashing ON once a second to
indicate healthy microcontroller operation.
S2 and S10 Connections
S2 Connections:-
S10 Connections:-
Pin 1
Ground
Pin 1
GROUND
Pin 2
Output 1
Pin 2
PTT input
Pin 3
Input 2
Pin 3
Analogue input
100mV
100mV
Pin 4
Input 1
Pin 4
FSK input
Pin 5
RS232 Tx
Pin 5
Relay out 0-12V
Pin 6
RS232 Rx
Pin 6
Switch 100R to
GND
GND
Pin 7
Speaker
Pin 8
+5V
PROGRAMMING
Preparations for Connecting the Programming Software
To change the field programmable options the unit must be connected to a PC either by the preferred USB
port S8 (using the supplied USB mini cable), or the standard serial RS232 port S2. When connected via the
USB the unit will appear as a virtual storage device.
Note:
To make up a serial cable, the S2 connections are shown on page 3. Alternatively purchase an
optional Salcom 12-45 serial programming cable.
optional Salcom 12-45 serial programming cable.
The 12-38-0000 must be powered during programming, +13.8V to power terminals.
SALCOM 12-38 SERIES VHF AND UHF TRANCEIVER
Issue 1238UD 1015
Sea Air and Land Communications Ltd
Page 4
CONFIGURATION
Via a Terminal Programme
All serial commands are sent and received using a standard terminal application connected at 9600:N:8:1
using a 12-45 programming adaptor. Ensure that the correct COM port is selected.
Sending MAP<CR> to the 12-38 will display current configuration information. To change a parameter refer
to the terminal programme instructions. An example is given below:
+03=456675000<CR>
to change the RX frequency
Via the USB
If the connection is via the USB then the 12-38 will appear as a drive on the computer. The configuration
information is held in the config.ini file which can be opened and edited using a standard text editor. Once
the required parameter has been changed save the file back to the original location.
Whilst the USB is connected the Green LED will flash faster.
Parameter format
Each parameter followings the same format. An example is given below:
;Tx Frequency set the Transit Frequency in Hz
the command description
;+20=456675000
an example for the correct format
+20=456675000
the actual parameter set
ANALOGUE TRANSMISSIONS VIA EXTERNAL MODULATON SOURCE
Connect the External Modulation Source to Pin 3 of connector S10. This input is configured for a fixed
amplitude input source of 100mV rms , or 280mV p-p. Monitor the RF output on a FM modulation on a
meter and adjust the deviation to ±4kHz. Adjust the deviation by fine adjustment of the input signal, or
via the PSD by changing the DAC setting within the ‘Audio in Atten’ box. Do not click ‘Enable
Calibration’ tick box for this adjustment. It is important to ‘Read’ first, then alter the settings, a higher
number gives more deviation and lower number less deviation.
amplitude input source of 100mV rms , or 280mV p-p. Monitor the RF output on a FM modulation on a
meter and adjust the deviation to ±4kHz. Adjust the deviation by fine adjustment of the input signal, or
via the PSD by changing the DAC setting within the ‘Audio in Atten’ box. Do not click ‘Enable
Calibration’ tick box for this adjustment. It is important to ‘Read’ first, then alter the settings, a higher
number gives more deviation and lower number less deviation.
It is also important to keep the deviation to ±4kHz to avoid getting into the compression range. Then
press ‘Program’ in the ‘Configuration’ section to save the settings.
press ‘Program’ in the ‘Configuration’ section to save the settings.