Orban OPTIMOD-FM 5518, Operating Manual

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5518-FM DIGITAL INSTALLATION
2-45

Select
T
IME
P
ROT
if the 5518 is behind a firewall that does not pass UPD
packets.
T
IME
P
ROT selects the Time Protocol as described in the standard
RFC868. This method uses TCP on port 37.

Select SNTP if your network timeserver supports the Simple Network Time
Protocol as described in standard RFC1769. This method uses UDP on port
123.
Ask your network administrator which protocols are available. SNTP is
slightly more accurate.
B) Using
S
YNC
P
ERIOD
, choose how often your 5518 will automatically update its
internal clock to the timeserver you selected.
The choices are
O
FF
,
8
HOURS
, and
24
HOURS
.
If the connection to the timeserver fails (due to network overload or
other problems), your 5518 will try once per hour to synchronize until it
is successful.
C) Set the
O
FFSET to the difference (in hours) between your time zone and Uni-
versal Time (UTC).
UTC is also known as GMT, or Greenwich Mean Time.

The value can range between –12 and +12 hours in increments of 30 min-
utes. If this value is set to 0, your 5518’s time will be the same as UTC.

You can empirically adjust this value until the correct time for your location
is displayed after you synchronize your 5518 to a timeserver.
2. Choose a timeserver.
http://tf.nist.gov/tf-cgi/servers.cgi# provides a current list of timeservers available
on the Internet. You network may also have a local timeserver; ask your network
administrator.
3. Press the NEXT button to set up timeserver parameters.
The
T
IME
S
ERVER button is located on the second page of the
T
IME
S
YNC func-
tions. (You can access this function from anywhere in the 5518 menu tree by
navigating to
Setup > Next > T
IME
D
ATE
A
ND
I
D
> Next > T
IME
S
YNC
> Next .)
You can specify the timeserver either from your 5518’s front panel or from its PC
Remote software. From the front panel, you can only enter the timeserver’s IP
address (for example, 192.43.244.18). If you specify the timeserver from PC Re-
mote, you can specify either its named address (for example, time.nist.gov) or its
IP address. The PC Remote method is easier.
4. Specify the time sync parameters from your 5518’s front panel:
[Skip this step if you wish to specify the timeserver and time sync parameters
from your Windows XP computer.]
A) Press the
T
IME
S
ERVER
button
.