6.16.2 Test, RF & FEC Menu

Test modes: [Off] 1=Off 2:Tx CW

3:Tx Alt 1,0 4=RS corrections disable

 

Test, RF & FEC Menu

The test modes available are:

OFF

All test modes are cancelled.

TX CW

Selecting TX CW causes a pure carrier to be transmitted. This is useful for

 

evaluating phase noise and spurious, but should not be used over a live satellite

 

link.

TX ALT 1,0

Selecting TX alt 1,0 causes an alternating 1,0,1,0.... pattern to be fed to the

 

modulator at the symbol rate. This produces two discrete frequencies to be

 

generated, spaced at ± symbol rate about the (suppressed) carrier. This is useful

for evaluating the carrier suppression of the modulator but should not be used over a live satellite link.

RS CORRECTIONS

DISABLE This option allows the corrections being made by the RS decoder to be inhibited, without the removal of the RS overhead. This allows the true effect of the Reed- Solomon codec to be seen without data rate changes (which would affect Eb/No and therefore the error rate).

6.16.3 Test, PSU’S + TEMP Menu

PSU: +5V +15V -15V -5V Temp

Status: 97% 98% 102% 98% 46C

Test, PSU’s + Temp Menu

Power supply monitoring is only available if the Monitor/AGC option is fitted. If it is not the screen above displays only the temperature. When selected this displays all of the internal power supply lines & internal temperature as monitored by the processor with each PSU line is displayed as percentage of the nominal value. The temperature is monitored continuously and a Unit Warning /deferred alarm will be activated if ever the internal temperature reaches within 3 degrees Centigrade of the operating limits of 0C and 60C. Should the internal temperature exceed the limits of 0C and 60C, then a Unit Fault / Prompt Alarm is activated. The Tx carrier is muted outside the operating temperature range.

P300H

P300 Series Modem Installation and Operating Handbook

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Paradise P300 specifications Tx Cw, RS Corrections