6.6.14 Change, Tx, Modulator, CARRIER Menu

Carrier: [?] 1=Off 2=On

3=Muted after pwr brk 4=Intfc RTS Controlled

Change, Tx, Modulator, Carrier Menu

The state of the Transmit Carrier is selected as follows:

OFF

The carrier is off.

ON

The carrier will remain on, and after a power break it will automatically return to

 

on.

POWER BREAK

 

MUTE

The carrier is switched on BUT after a power cut the carrier will be switched off

 

and a deferred alarm generated until either from the front panel or remotely the

 

unit is instructed to return the carrier to the on state.

RTS

 

CONTROLLED

The carrier will be dynamically controlled by the `Sig Valid In`, the RTS line on a

 

V.35 DCE interface (see interface card details in appendix A for line names for

 

other interfaces). No alarm is raised when the Tx carrier is muted by the RTS line

 

going to the `off` state unless the RTS line itself is set to raise an alarm if it goes

 

to the off state (Change, Terr-Intfc, Control Lines).

The operator is warned if the carrier is set to POWER BREAK MUTE when SETUP-CHECKis requested.

6.6.15Change, Tx, Modulator, POWER LEVEL Menu

This is the normal menu for the P300 and P310 L-Band modem. An alternative menu is displayed when operating in `Terminal` mode with a Paradise BUC.

Set Tx Power [-15.3dBm]

enter value ??.? (YES), or to change

Change, Tx, Modulator, Power Menu (Normal)89

This menu allows control of the Transmit output power. This may be varied from 0dBm to -25dBm (-5dBm to -30dBm for the P310) in 0.1dB steps, either by direct entry of the required power or by using the up/down keys to adjust the current value up or down in 0.1dB steps. Pressing the Up/Down keys rapidly causes the level to change in 0.5dB increments. If AUPC is active (refer to AUPC in section 8.11.1 on page 154) then the delta power added by the AUPC is also displayed on the top line.

When the P310 is operating in Terminal Mode (ie with a Paradise BUC and with the FSK option fitted to the modem, and the Modem / BUC mode set to Terminal), the power level at the BUC is under closed loop control. The operator now enters the desired power at the BUC directly, and the modem operates in conjunction with the BUC, varying the Tx Carrier level and BUC attenuator to provide the desired power.

Power from BUC (13-33), now [31]dBm 1:Set new power 2:Nudge up/down

Change, Tx, Modulator, Power Menu (Terminal with BUC)

If a Paradise BUC & FSK are fitted, but the modem / BUC are set in independent mode, then a third screen is displayed (similar to the 1st) from which the setting of the BUC attenuator may also be accessed by pressing the down key from the power level menu.

P300H

P300 Series Modem Installation and Operating Handbook

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Paradise P300 specifications Power Break Mute, RTS Controlled, Change, Tx, Modulator, Power Level Menu