Nanometrics RM-4, Руководство пользователя

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External Batteries
An RM-4 with the +12V DC input option can operate from a 12V battery or a solar panel regulator.
Any DC voltage in the range 10V to 16V is acceptable.
Use only the cable supplied with your RM-4 with +12V input option when connecting to the
external power source
. Although over-voltage and reverse voltage protection is provided within
the RM-4, there is still a risk of damaging the unit if, for example, 12V is applied to the +5V pin of
the power connector.
RM-4 Timeserver Option
The timeserver feature provides a TCP/IP based time service agent. A computer can ask the RM-4
timeserver agent for the time via TCP/IP. When asked for the time, the timeserver returns a TCP/IP
message with the current UTC time accurate to 1 second.
The RM-4 timeserver can obtain time from two sources: GPS or connected HRDs. When the time
source is configured to HRD, the RM-4 will listen to the connected HRD data streams. Every 10
minutes an HRD outputs a timestamp message at the start of the second. The RM-4 listens for
these HRD timestamp messages and uses them to update the RM-4 timeserver time. The accuracy
of this time is about 1 second.
The timeserver will use a GPS engine as the time source if the RM-4 has a GPS engine and is
configured to use it. The GPS engine provides an accurate UTC time source to the timeserver. Do
not enable GPS duty cycling when the RM-4 is acting as a timeserver.
RM-4 Manual 16
4 - User Guide