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P300H P300 Series Modem Installation and Operating Handbook Page 71
Carrier: [?] 1=Off 2=On
3=Muted after pwr brk 4=Intfc RTS Controlled
Change, Tx, Modulator, Carrier Menu
Set Tx Power [-15.3dBm]
enter value ??.? (YES), or
to change
Change, Tx, Modulator, Power Menu (Normal)
Power from BUC (13-33), now [31]dBm
1:Set new power 2:Nudge up/down
Change, Tx, Modulator, Power Menu (Terminal with BUC)
6.6.14 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-CHECK is requested.
6.6.15 Change, 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.
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.
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.