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997-01530-01, Rev. C-25, Jan 2008 39
2
5
1
SSSSSSSSSSSS SSSS SSSSSS SSSSSSS S SSS SSSSSSS
where:
Note: Parity - NONE is only available/valid when Data Bits is set to 8.
For example, to display the serial port settings, send:
F4<CR>
XL-GPS responds:
F4 232 9600 8 none 1<CR><LF>
To set the serial port settings, send:
F4 422 9600 7 even 1<CR>
XL-GPS responds:
OK<CR><LF>
F5 – Time-Quality Setup
Use function F5 to enable/disable time quality reporting, and to set the thresholds of the four time-quality
flags.
How time quality reporting works: If the GPS timing reference becomes unavailable to discipline or steer
the oscillator, the oscillator begins to drift and gradually accumulates time error. The XL-GPS estimates
time error based on the oscillator-type and on the degree of steering (the DAC value) that was being
applied to the oscillator before the timing reference became unavailable. As the estimated time error
grows, exceeding the threshold of the four Time Quality Flags set in F5, the XL-GPS outputs four
F = ASCII character F.
04 = function number.
<S> = ASCII space character (one or more).
<SEP> = One or more separator characters: either space, comma or tab.
<RS> = Interface type, RS-232 or RS-422
<BR> = Baud Rate, with possible values 1200, 2400, 4800, 9600, or 19200
<DB> = Data Bits, with possible values 7 or 8
<P> = Parity, with possible values “even” or “odd” or “none”
<SB> = Stop Bits, with possible values 1 or 2.
<CR> = Carriage return character.
<LF> = Line feed character.