Paradise P300 specifications Setup Menu, Action Menu, Buffer Centre, Slip Count Reset, Give Away

<Count of bits received> (ie both are in proportion). This would not be the case if we did not count the bits received, and simply assumed that the error rate was <Errors> / (<Time> x <Rate>).

This may not sit comfortably on first reading, but you are probably happy with the concept that a PRBS multiplexed in with the main data channel at say 5% of the main data rate will provide the same BER reading as for the main data channel itself. You would probably agree that the result would be no different if the PRBS content was dropped to say 4% of the main data channel, implying that reducing the bits available to measure the BER by 20% will have no effect on the validity of the BER reading. The argument for the Internal BERT is no different, >99.9% of the bits available for BER measurement are used, with the other <0.1% lost as the processor reads the hardware registers.

6.17SETUP MENU

See Setup - Initial Configuration Menu on page 53

6.18ACTION MENU

Action: 1=Buffer Centre

2=Slip counter reset 3=1:1 Give away control

Action Menu

The options on this menu are fairly self explanatory, however for completeness:

BUFFER
CENTRE	Forces the Rx buffer to re-centre, and will cause a burst of errors. This is
	automatically performed when the Rx traffic goes from fail to OK if the option
	under CHANGE, USER-OPT, OPERATION, ACTIONS, BUFFER AUTO CENTREis
	enabled.
SLIP COUNT
RESET	This resets the counts of underflows and overflows on the Status status screens
1:1 GIVE AWAY	When two Modem's are configured as a 1:1 pair, this can be selected on the on-
	line unit, to handover control to the off-line unit.

P300H P300 Series Modem Installation and Operating Handbook Page 130