DC-Digital DC-40N Installatiehandleiding - Pagina 2
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Lens Face
The DC-40N is designed to provide a time of day reference that is easy to see from a distance,
40N is designed to provide a time of day reference that is easy to see from a distance,
40N is designed to provide a time of day reference that is easy to see from a distance,
maintenance free and accurate. The 4 inch high digits with wide stroke offer a viewing distance
maintenance free and accurate. The 4 inch high digits with wide stroke offer a viewing distance
maintenance free and accurate. The 4 inch high digits with wide stroke offer a viewing distance
up to 200 feet. With no moving parts and automatic time change for dayli
up to 200 feet. With no moving parts and automatic time change for daylight savings as well as
periodic correction with an NTP source, all maintenance tasks have been eliminated. Accuracy is
periodic correction with an NTP source, all maintenance tasks have been eliminated. Accuracy is
periodic correction with an NTP source, all maintenance tasks have been eliminated. Accuracy is
achieved by timekeeping processes done by dedicated hardware in parallel with other electronics,
achieved by timekeeping processes done by dedicated hardware in parallel with other electronics,
achieved by timekeeping processes done by dedicated hardware in parallel with other electronics,
a crystal that has been factory calibrated and periodic correction by modern networking protocols.
a crystal that has been factory calibrat
With a sustained network connection to an accurate NTP source, the DC-40N will keep time
With a sustained network connection to an accurate NTP source, the DC
within 1 second of atomic, factoring in network latency. If the network is interrupted, the DC-
within 1 second of atomic, factoring in network latency. If the network is interrupted, the DC
within 1 second of atomic, factoring in network latency. If the network is interrupted, the DC
40N will keep time ± 2 minutes a year.
time ± 2 minutes a year.
When powered up, the display will cycle through numbers 0
When powered up, the display will cycle through numbers 0-9 on all digits. This test pattern
should complete in approximately 10 seconds. After the self
ete in approximately 10 seconds. After the self-test, it will display the time of day,
starting at midnight. During the self
with the local area network. If successful, it will then attempt to query the NTP server for time. If
it receives a valid response from the NTP server, it will update the time. Once the time has been
it receives a valid response from the NTP server, it will update the time.
updated, the DC-40N will wait for an
40N will wait for an
interval of real time before querying
interval of real time before querying
the NTP server again. If it is
unsuccessful in obtaining the time,
unsuccessful in obtaining the time,
either on power up or after the update
either on power up or after the update
interval, it will make an attempt every
interval, it will make an attempt every
10 seconds until it is successful.
DC-40N has many configuration
40N has many configuration
parameters that can be changed to suit
parameters that can be changed to suit
the application where it is deployed.
the application where it is deployed.
The table at right outlines this default
The table at right outlines this default
configuration.
Introduction
ed and periodic correction by modern networking protocols.
e self-test, the DC-40N will also attempt to establish a connection
. If successful, it will then attempt to query the NTP server for time. If
. If successful, it will then attempt to query the NTP server for time. If
Device Name
Network Addressing Mode Dynamic (DHCP)
Time Zone
Daylight Savings Change
The
Hour Format
NTP Server
Update Interval
User Name
Password
Ethernet Jack (RJ-45)
Ethernet Jack (RJ
ght savings as well as
40N will keep time
9 on all digits. This test pattern
test, it will display the time of day,
will also attempt to establish a connection
Once the time has been
Defaults
DC-Digital
Digital-NTP-####
Dynamic (DHCP)
Eastern
Observe DST
Observe DST
12-Hour
time.nist.gov
time.nist.gov
1 minute
username
usernam
password
password
Power Jack
Power Jack