Operation
Topcon HiPer+ Operator’s Manual
4-18
Managing HiPer+ Memory
When using the HiPer+ in static or dynamic applications, you
may need to know the amount of memory the receiver’s log file
occupies. The specific memory size depends on the type of data
being recorded. Use the formulas below to compute the
approximate size of the receiver’s log files.
• SS – the estimated size of one epoch of raw data in the
receiver’s log file (expressed in bytes).
• N – the number of observed satellites per epoch.
When recording only L1 data:
SS = 183 + 22*N
When recording L1 and L2 data:
SS = 230 + 44*N
Clearing the NVRAM
The receiver’s Non-Volatile Random Access Memory (NVRAM)
holds data required for satellite tracking, such as ephemeris data
and receiver position. The NVRAM also keeps the current
receiver’s settings, such as active antenna input, elevation masks
and recording interval, and information about the receiver’s
internal file system.
Even though clearing the NVRAM is not a common (nor
normally a recommended) operation, there are times when
clearing the NVRAM can eliminate communication or tracking
problems. Clearing the NVRAM in your HiPer+ can be
interpreted as a “soft boot” in your computer.
Firmware versions 2.2p1 or higher keep the PDL modem on after
clearing the NVRAM.
After clearing the NVRAM, your receiver will require some time
to collect new ephemerides and almanacs (around 15 minutes).
Clearing the NVRAM of your receiver will not delete any files
already recorded in your receiver’s memory. However, it will
reset your receiver to factory default values.
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