Clearing the NVRAM (Non-volatile random ... - Position Partners
Clearing the NVRAM (Non-volatile random ... - Position Partners
Clearing the NVRAM (Non-volatile random ... - Position Partners
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<strong>Clearing</strong> <strong>the</strong> <strong>NVRAM</strong> (<strong>Non</strong>-<strong>volatile</strong><br />
<strong>random</strong> access memory) on<br />
Topcon GR-3 3 Receivers<br />
January 2008
<strong>Clearing</strong> <strong>the</strong> <strong>NVRAM</strong><br />
• A Topcon receiver's <strong>Non</strong>-Volatile Random Access<br />
Memory (<strong>NVRAM</strong>) holds data required for satellite<br />
tracking, such as ephemeris data, almanac data, and<br />
receiver position. The <strong>NVRAM</strong> also keeps <strong>the</strong> current<br />
receiver's settings, such as active antenna input,<br />
elevation masks and recording interval.<br />
• <strong>Clearing</strong> a receiver's <strong>NVRAM</strong> can eliminate<br />
communication or tracking problems. <strong>Clearing</strong> <strong>the</strong><br />
<strong>NVRAM</strong> can be interpreted as a soft boot to your<br />
computer.<br />
•<strong>Clearing</strong> <strong>the</strong> <strong>NVRAM</strong> of your Topcon receiver will not delete any static file within <strong>the</strong><br />
receiver. However, it will reset <strong>the</strong> receiver's internal parameters to factor defaults.<br />
•After clearing <strong>the</strong> <strong>NVRAM</strong> in a Topcon receiver, <strong>the</strong> receiver's Status (STAT) LED will<br />
flash orange for a few seconds indicating that <strong>the</strong> receiver is scanning and checking<br />
<strong>the</strong> file system.<br />
•After clearing <strong>the</strong> <strong>NVRAM</strong>, <strong>the</strong> receiver will require some time to collect new<br />
ephemerides and almanacs (around 15 minutes).
• The first step to clearing <strong>the</strong> <strong>NVRAM</strong> in a Topcon receiver is to<br />
power it off. If <strong>the</strong> receiver is currently powered on, simply press<br />
and hold green power button.<br />
• Once off, it is normal for <strong>the</strong> receiver’s BATT (battery) lights to<br />
blink once every five seconds<br />
• However, <strong>the</strong> STAT (status) light should not be blinking.
• With <strong>the</strong> receiver powered off, press and hold <strong>the</strong> gray FUNCTION<br />
button.<br />
• Then also press and hold <strong>the</strong> green power button. You will be pressing<br />
and holding <strong>the</strong> gray FUNCTION and green power button toge<strong>the</strong>r.<br />
• Both <strong>the</strong> STAT and REC lights will turn solid green.<br />
• When both <strong>the</strong> STAT and REC lights blink orange in color, let go of all<br />
buttons.<br />
• It is common for <strong>the</strong> STAT light to blink orange for a few seconds.
Technical Support<br />
Topcon's Professional Services Group is headquartered in <strong>the</strong><br />
Columbus, Ohio office. Contact and ticketed technical support<br />
issues are addressed by phone from 7am until 7pm, Monday<br />
through Friday, Central Standard Time.<br />
Contact is reserved for our distributors and owners of our<br />
products. For support questions prior to purchasing, please<br />
contact your local dealer.<br />
1-866-4TOPCON<br />
1-866-486-7266<br />
You may also reach support by FAX: 1-614-896-3739
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