23audio ID, because the GDL 69 is a data-onlyreceiver.)• Audio Signal. The Audio Signal field indicatesthe signal strength of the GDL 69A’s audiosignal. (In the case of a GDL 69, this field shows“antenna” rather than a signal strength indica-tion.)• Data ID. The Data ID field contains the eight-character ID code of the XM data radio builtinto the GDL 69 or GDL 69A. Provide this IDto XM Satellite Radio when activating your XMaviation data subscription.• Data Signal. The Data Signal field displays anindication of the XM data signal strength.• Service Class. Once you have activated yourXM Satellite Radio service, the Service Classfield will show the XM subscription plan youhave purchased. Typical values would be “Avia-tor LT” or “Aviator.” Currently, the 400W and500W-series only support a subset of the Avia-tor LT service from XM Satellite Radio.Product Aviator LT AviatorNEXRAD • •Radar Coverage • •Precipitation Type(at surface)• •TFRs • •METARs • •TAFs • •Winds Aloft •Cell Movement •Lightning •• GDL 69 Version. This field shows the versionnumber of the software in your GDL 69 or GDL69A XM radio receiver.XM WX TimestampsThe XM WX Timestamps page, like the XMInformation page, is added to the 400W/500W’s AUXpage group when a GDL 69/69A is installed. Thispage displays date/time stamps showing when thevarious items of XM weather data were most recentlydownloaded.Each of these time stamps is a date-time group in“DDHHMMZ” format, where:• DD is the day of the month• HH is the hour of the day• MM is the minute of the hour• Z is a time zone designator indicating that thedate and time are for standard time on theGreenwich meridian: that is, UTC (Coordi-nated Universal Time).Part Two: Section 3XM Aux Pages190-00356-30 Rev C