Xylem XL Series H-522 - Plus - Manual (Page 196)

16-40 Operation with the GOES Radio
XL™ Series
The next two bytes indicate modulation status. The NN indicates normal modulation index, and
normal modulation quality. The index may also report an ‘H’ or ‘L’ for high or low modulation
index. The quality may also report ‘F’ or ‘P’ for fair or poor quality.
163708DE08078184903G51+1 NN 021EUB00023BCT@DZ@DY@Dc@Db@Dm@Dxj
The next three bytes are the channel number. In this case 021 is channel 21. This is an odd
number which normally indicates it is transmitting to the eastern satellite, (75 Degrees W). Even
channel numbers normally transmit to the western satellite, (135 Degrees W).
163708DE08078184903G51+1NN 021 EUB00023BCT@DZ@DY@Dc@Db@Dm@Dxj
The next byte is a letter ‘E’ or ‘W’ indicating the eastern or western satellite. In this case the
eastern satellite.
163708DE08078184903G51+1NN021 E UB00023BCT@DZ@DY@Dc@Db@Dm@Dxj
The next two bytes are TBD.
163708DE08078184903G51+1NN021E UB 00023BCT@DZ@DY@Dc@Db@Dm@Dxj
The next few bytes indicate how many data bytes are going to be transmitted. In this case 00023
data bytes.
163708DE08078184903G51+1NN021EUB 00023 BCT@DZ@DY@Dc@Db@Dm@Dxj
This is the end of the header information added by the GOES system. Everything from this point
on is from the data logger and is normally data. The data could be decoded using the discussion
in section 16.7 above.