Memorex RX 1 Smart Manual de Instalação descarregar pdf (Página 248)

Simrad MX500 | 247

PARITY CONVENTION

In checking message parity (refer to PARITY CHECK),

the software may be designed to check either odd parity

or even parity. The choice is called parity convention:

either odd or even parity convention. Under odd parity

convention rule, the binary-coded message has the par-

ity bit set to make up an odd number of message bits.

Under even parity convention rules, the binary-coded

message has the parity bit set to make up an even num-

ber of message bits.

P-CODE

A limited-access signal broadcast by the NAVSTAR satel-

lites currently available only to military users.

PDOP (Position Dilution of Precision)

An indicator of the accuracy in position (latitude, longi-

tude, and altitude). See DILUTION OF PRECISION.

PLANE PROJECTION

The technique of converting the curved surface of the

Earth to a flat surface to represent a map.

Polled Mode

A transponder is in a polled mode during a request-

response session only. Distinguish this from a station,

which is polled into certain slots. This station is first

polled and then enters assigned mode.

POSITION UPDATE

The redefining of position by analysis of satellite orbital

data as referenced to time.

PRN

See PSEUDORANDOM NUMBER.

PROCESSOR

The processor circuit card in the console that controls

system operations and computes the positioning/ naviga-

tion solutions.

PROMPT

A message on the display instructing the operator to

make a keyboard entry.

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Memorex RX 1 Smart Manual de Instalação Página 248