TrueTime 151-600, Manual

Page: 62 / 107

X X L L D D C C M M A A N N . . d d o o c c 3 3 - - 3 3 3 3 R R E E V V E E
The remaining items are fault conditions, which can be individually enabled or disabled from affecting
the alarm output(s). The <en> field is either "En" or "Dis" and can be toggled with the Up/Down arrow
keys to Enable or Disable each fault condition. These mask settings will be changed only if requested
at the end of all of the fault items.
Major Alarm: <en>
PLL:
<pll status>
<pll status> can be "OK" or "Unlocked". In some Models not having a 10 MHz auxiliary oscillator, an
indication of "Unlocked" is normal since the hardware PLL is not used.
Major Alarm: <en>
Antenna:
<ant. status>
<ant. status> can be "OK", "Short" or "Open". This indicates detection of improper load conditions on
the antenna feed.
Major Alarm: <en>
Receiver:
<rec. status>
<rec. status> can be "OK", or "Fault". A "Fault" indicates there is some problem with the GPS receiver,
such as it is failing to communicate with the host processor.
Major Alarm: <en>
NV RAM:
<nvram status>
<nvram status> can be "OK" or "Error". If any checksum errors were found on recalling any non-
volatile memory blocks, or one or more blocks were missing and were created with default values, then
<nvram status> will be "Error". This may occur the first time the unit is powered up, or if some options
have just been installed and new non-volatile memory blocks have been created for their use.
If <nvram status> is "Error", then the next item will be
Clear NV RAM
fault? <resp>
where <resp> can be toggled between "No" or "Yes" by the Up/Down arrow keys. After the operator
has confirmed that all settings are correct, this item can be used to cancel the error, so that future
errors can be caught.
Major Alarm: <en>
Timeout:
<timeout status>
<timeout status> can be "OK" or "Fault". "Fault" indicates that the time error has exceeded the time
error threshold for more than Timeout seconds.
The timeout delay can be set by the next dialog:
Timeout delay
<timeout> s