SEA 157S, Предварительное руководство по обслуживанию

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3.5.7.4 CLASS A CALL DETAIL
The DSC calls described to this point in the manual have consisted
of predefined message formats for commonly used DSC calls. The
predefined versions allow the operator to place calls quickly and
efficiently using minimal additional information input.
Calls that contain more specific information, such as requiring a
data response rather than voice communications, may be created
using the “Class A” build operation. The following paragraphs
describe the structure and organization of Class A calls.
Most Class A calls contain the following information: Format Type,
Priority Category, Telecommand 1 and Telecommand 2. Note that the
type of information available will be dependent on the type of
call being composed. An example would be an All Ships call that
requires no destination DSC ID.
To use the Class A composer, press FNC-8 to access the DSC Menu.
Use the rotary control to select “Class A”, then press ENT.
Prompts will appear for additional information as required. Once
the DSC message construction is complete, instructions will be
given to send the DSC call. See Appendix D in OPR-157S for details
on the information fields.
3.6 USING TEST, CALIBRATION AND DIAGNOSTIC UTILITIES
Enter the service menu by pressing FUNC-ENT and entering the
service menu activation code (contact the factory with the radio’s
serial number to receive the activation code).
A menu allowing you to adjust the clock frequency, 1W power level,
25W power level and transmit the DSC tones and dot patterns.
During all of the service menus PTT is active so that the
transmitter can be tested.
3.6.1 CLOCK TUNING
Select the ‘CLKTUN’ menu and press ENT. The display will show the
clock frequency adjustment value (0-200, 100 is normal setting).
Use the rotary control to adjust the value and press MODE to store
the new setting and exit the adjustment mode.
3.6.2 POWER LEVEL ADJUSTMENT
Select the ‘1W ADJ’ or the ‘25W ADJ’ mode from the service menu.
Press ENT to enter the adjustment menu. The 3 digit display will
show the current power level control setting and the right 3
digits of the 8 character display will show the forward power
reading. Pressing PTT will transmit and the ALC will adjust the
power level to be equal to the setting selected. Press ENT to
store the setting to non-volatile memory and exit the service
menu.
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