Dsc Test - Furuno FS-1575 Service Manual

5.5 DSC TEST

Select [MENU] -> 9.SERVICE -> 3.RT SETUP -> 3.DSC TEST to open the Sub-menu
"DSC TEST." This menu allows for making measurement of TX output power and
frequency by converting the DSC modulating signal.
Selecting [MENU] -> 9.SERVICE -> 3.RT SETUP -> 4.TX POWER (FREQ) also
allows for making the said measurement.
Sub-menu
TX TYPE
TX FREQ
TX KEY
DSC TX frequency measurement
• Set "TX TYPE" to "SPACE," and then "TX KEY" to "ON."
TX frequency will be set to "Fc + 85 Hz" with a deviation of ±10 Hz or less.
• Set "TX TYPE" to "MARK," and then "TX KEY" to "ON."
Transmission frequency will be set to "Fc − 85 Hz" with a deviation of
±10 Hz or less.
DSC TX output power measurement
Setting "TX TYPE" to "DOT," and then "TX KEY" to "ON" will allow for making
measurement of DSC TX output power; J2B.
TX output power can be reduced by setting "TX POWER" on the "RT SETUP"
window to "HIGH," "MID," or "LOW."
Note)
Even when "TX TYPE" is set to "SPACE" or "MARK," the speaker will not output
selected TONE. To make TONE frequency measurement, use the Sub-menu "TX
POWER (FREQ)."
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Table 5.5.1 Sub-menus of DSC TEST
Setting Parameter Remark
Outputs power at 1785 ± 85 Hz, 100 bps.
DOT
Outputs power at 1785 + 85 Hz
SPACE
Outputs power at 1785 − 85Hz.
MARK
Makes setting of frequency to be
1605.0 to 27500.0
allocated.
ON
Makes setting of TX KEY to ON or OFF.
OFF
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5.5 DSC TEST