Ross SRG-4400, Руководство пользователя

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SRG-4400 User Manual (Iss. 06) Menu System • 5–51
The options in the sub-fields are: 000 through 255. The value of 000 is the default “no action”
setting.
To change the settings:
1.
pressing the rotary control advances through each sub-field
2.
rotating the rotary control changes the value of the currently selected sub-field.
Poll Server
This menu line allows the user to set the interval (in seconds) at which the SRG-4400 requests
NTP time information from the specified time server.
The options in the Poll Interval field are:
• Never
• 60 secs
• 2/5/10/30/60 minutes
• 2/4/8 hours
One initial power-up, the SRG-4400 will poll the NTP Server every 10 seconds until a reply is
received, and then drop back to the user-selected value as programmed in this menu sub-field.
Poll Status
This menu line reports the current poll status of the designated NTP Server address.
Initially, the sub field will report that the SRG-4400 is currently waiting for replies from the
designated NTP Server:
Poll Status = Acquiring NTP
.
When replies from the designated NTP Server produce consistently accurate time stamps, the
sub-field will change to:
Poll Status = tLocked to NTP
.
During NTP acquisition, the following menu line appears below the Poll Status line:
Unlocked
Poll every 010 secs
.
This menu line reports the polling interval when the NTP Server is being actively polled during
initial acquisition. The interval of 10 seconds should ensure that at least one reply will be found
very quickly, After a reply has been received, the polling interval drops back to the user setting
made in the menu entry
Poll Server every 240 secs
above, and the following menu line
appears.
The menu line
NTP time Uncertainty = nnnnms
reports the average variation in successive
NTP replies.
Server Mode
An example of NTP Server Mode menu is below.
Figure 5.26 NTP Server Menu Example
This is an NTP Client No =
Serve NTP if ‘SPG failed’ No =
Serve NTP if ‘No GPS’ No =
This is an NTP..............................Server
Server NTP if ‘No GPS’?........................xxx
Server NTP if ‘SPG Failed’?....................xxx