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Messages Chapter 5
WAAS GUS Signal Generator User Guide Rev 1 41
INVALID FIELD VALUE FIELD
If a ‘1’, this flag indicates that the Signal Generator detected an invalid field value in the last command received,
during the previous 1-second epoch. This flag is reset after the status message has been transmitted.
INVALID RANGE FIELDS FIELD
If a ‘1’, this flag indicates that the range fields contained in this status message are invalid and should not be used.
5.1.4.6 Hardware Status Fields
The Hardware Status field contains the current state of the Signal Generator hardware. The hardware is polled when
the Status Message is created at the start of the current 1 second epoch.
Table 41 shows the Hardware Status field bit
order. Table 42 shows the Hardware Status bit fields.
Table 41: Hardware Status Field
Table 42: Hardware Status Bit Fields
10 MHZ PRESENT FIELD
This flag indicates if the 10 MHz clock signal is present. If a ‘1’, then the 10 MHz signal is present. If a ‘0’, then the
10 MHz signal is absent.
CLOCK CIRCUIT FAULT FIELD
This flag indicates if the clock circuit board is faulty. If a ‘1’, then the clock circuit board is faulty. If a ‘0’, then the
clock circuit board is not faulty.
Byte [14]
D7 D6 D5 D4 D3 D2 D1 D0
MSB LSB
Bit Hardware Status Description Range
D0 Reference 10 MHz Present
0 = Not Present
1 = Present
D1 Clock Circuit Fault
0 = No Fault
1 = Fault
D2 RF Circuit Fault
0 = No Fault
1 = Fault
D3 BPSK or QPSK Mode Selected
0 = BPSK
1 = QPSK
D4 Reserved for future use.
D5 Symbols Per Second 500
0 = 500 SPS
1 = 1000 SPS
D6 Signal Generator Operational
0 = Not Operational
1 = Operational
D7 Reference 1PPS present
0 = Not Present
1 = Present