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<blockquote data-quote="Cleon" data-source="post: 8261227" data-attributes="member: 57383"><p>Okay, the theoretical maximum range of radio communication is proportional to the square-root of the power of the transmitter.</p><p></p><p>The range of radar detection is proportional to the fourth-root of transmitter power (i.e. the square-root of the square-root), since the radio pulse must travel to the target, bounce off, and then travel the same distance back (assuming transmitter and receiver are at the same location, which'll be the case since both are built into the robot).</p><p></p><p>There are other limiting factors - the size of the dish, quality of pathway, line-of-sight, horizon, et cetera which'll likely reduce the radarsight range still further.</p><p></p><p>So the radarsight range should be some fraction of the square-root of the radiospeech range (assuming they both use the same signal power). That might be a bit too complicated if it requires the DM to pull out a calculator to figure out if an enemy's radiospeech can "hear" the radar. Especially since the droid could presumably lower its radar power to shorten its range. Some kind of ratio might be more in order, like the radarsight has a range of X feet per Y miles of radiospeech range.</p><p></p><p>Maybe 30 feet for every 10 miles? Then if we give the robots 20 mile, 50 mile and 100 mile radiospeech, their radarsight would be 60 feet, and 150 feet and 300 feet. That's the distance at which it can clearly distinguish shapes, it could probably detect the presence of a large object out to considerably larger distances, say a maximum of, say, one-twentieth the radiospeech range? So one mile, 2½ miles and 5 miles.</p><p></p><p><strong>Guardian Droid & Luxury Valet Droid:</strong> radarsight 150 ft. [<em>max 2½ mile, detectable 50 miles</em>], radiospeech 50 miles</p><p><strong>Servitor Droid:</strong> radiospeech 20 miles <strong>[</strong><span style="color: purple">if it had radarsight it'd be "radarsight 60 ft. [<em>max 1 mile, detectable 20 miles</em>]"</span><strong>]</strong></p><p><strong>Valet Droid:</strong> radiospeech 20 miles</p><p><strong>Warrior Droid:</strong> radarsight 300 ft. [<em>max 5 mile, detectable 100 miles</em>], radiospeech 100 miles</p><p></p><p>I also propose the following tweaks to the Special Qualities:</p><p></p><p><strong>Radarsight (Ex):</strong> This droid possesses sophisticated microwave radar, allowing it to "see" the shape of objects and creatures. Radarsight ignores concealment caused by darkness, fog or clouds. <em>Invisibility</em> provides total concealment against radarsight, although the droid may still make Spot checks to notice the location of an invisible opponent. Rain has the same effect on radarsight as it does normal vision. Unlike radiospeech, normal radarsight requires line of sight and cannot extend "over the horizon".</p><p></p><p>Radarsight cannot discern colors and any object or texture smaller than a quarter of an inch will just be a foggy blur. The listed range is the maximum distance radarsight can clearly distinguish shapes. It can detect the presence of objects at longer ranges - out to a maximum of one mile for every 60 ft. of range for extremely big objects such as hills and titanic buildings or creatures - but can't identify their shapes. So it might register the presence of a mountain giant a few thousand feet away with an appropriate Spot skill check, but it couldn't tell the Colossal moving object has a humanoid shape.</p><p></p><p>A creature using radarsight stands out to radarsight or radiospeech like someone walking around in the dark while shouting and waving a bullseye lantern about. They are detectable out to a maximum distance of 10 miles for every 30 ft. of radarsight range, but this distance is reduced by the same factors that can interfere with radiospeech. A Spot check is still necessary for a radio-sensitive creature to notice a radarsight source, but it has a +10 circumstance bonus.</p><p></p><p><strong>Radiospeech (Ex):</strong> A creature with this ability can broadcast a radio communication with a radius up to the listed range (the creature can use less than its maximum range if it wishes to). All creature with radiospeech that are within range hears the communication, so it is possible to address many creatures at once using radiospeech, although maintaining a conversation with more than one creature at a time is as difficult as speaking with multiple people simultaneously. Radiospeech relies on words, so two creatures must understand the same language to communicate by radiospeech. Some items can listen to or broadcast radiospeech, allowing creatures without this ability to participate in radiospeech conversations.</p><p></p><p>Radiospeech cannot penetrate 10 feet of stone or wood, three feet of water, or an inch of metal. Intervening objects and radio noise can interfere with the radio signal and reduce the range by a factor of two to twenty or more depending on how bad the interference is. Electrically conducting objects provide the worst interference. If the creature is inside a building or is surrounded by construction or metalwork their radiospeech range will be divided by a factor of at least fifty. Rainfall and terrain that's mountainous or lightly forested will likely halve the radiospeech range.</p></blockquote><p></p>
[QUOTE="Cleon, post: 8261227, member: 57383"] Okay, the theoretical maximum range of radio communication is proportional to the square-root of the power of the transmitter. The range of radar detection is proportional to the fourth-root of transmitter power (i.e. the square-root of the square-root), since the radio pulse must travel to the target, bounce off, and then travel the same distance back (assuming transmitter and receiver are at the same location, which'll be the case since both are built into the robot). There are other limiting factors - the size of the dish, quality of pathway, line-of-sight, horizon, et cetera which'll likely reduce the radarsight range still further. So the radarsight range should be some fraction of the square-root of the radiospeech range (assuming they both use the same signal power). That might be a bit too complicated if it requires the DM to pull out a calculator to figure out if an enemy's radiospeech can "hear" the radar. Especially since the droid could presumably lower its radar power to shorten its range. Some kind of ratio might be more in order, like the radarsight has a range of X feet per Y miles of radiospeech range. Maybe 30 feet for every 10 miles? Then if we give the robots 20 mile, 50 mile and 100 mile radiospeech, their radarsight would be 60 feet, and 150 feet and 300 feet. That's the distance at which it can clearly distinguish shapes, it could probably detect the presence of a large object out to considerably larger distances, say a maximum of, say, one-twentieth the radiospeech range? So one mile, 2½ miles and 5 miles. [B]Guardian Droid & Luxury Valet Droid:[/B] radarsight 150 ft. [[I]max 2½ mile, detectable 50 miles[/I]], radiospeech 50 miles [B]Servitor Droid:[/B] radiospeech 20 miles [B][[/B][COLOR=purple]if it had radarsight it'd be "radarsight 60 ft. [[I]max 1 mile, detectable 20 miles[/I]]"[/COLOR][B]] Valet Droid:[/B] radiospeech 20 miles [B]Warrior Droid:[/B] radarsight 300 ft. [[I]max 5 mile, detectable 100 miles[/I]], radiospeech 100 miles I also propose the following tweaks to the Special Qualities: [B]Radarsight (Ex):[/B] This droid possesses sophisticated microwave radar, allowing it to "see" the shape of objects and creatures. Radarsight ignores concealment caused by darkness, fog or clouds. [I]Invisibility[/I] provides total concealment against radarsight, although the droid may still make Spot checks to notice the location of an invisible opponent. Rain has the same effect on radarsight as it does normal vision. Unlike radiospeech, normal radarsight requires line of sight and cannot extend "over the horizon". Radarsight cannot discern colors and any object or texture smaller than a quarter of an inch will just be a foggy blur. The listed range is the maximum distance radarsight can clearly distinguish shapes. It can detect the presence of objects at longer ranges - out to a maximum of one mile for every 60 ft. of range for extremely big objects such as hills and titanic buildings or creatures - but can't identify their shapes. So it might register the presence of a mountain giant a few thousand feet away with an appropriate Spot skill check, but it couldn't tell the Colossal moving object has a humanoid shape. A creature using radarsight stands out to radarsight or radiospeech like someone walking around in the dark while shouting and waving a bullseye lantern about. They are detectable out to a maximum distance of 10 miles for every 30 ft. of radarsight range, but this distance is reduced by the same factors that can interfere with radiospeech. A Spot check is still necessary for a radio-sensitive creature to notice a radarsight source, but it has a +10 circumstance bonus. [B]Radiospeech (Ex):[/B] A creature with this ability can broadcast a radio communication with a radius up to the listed range (the creature can use less than its maximum range if it wishes to). All creature with radiospeech that are within range hears the communication, so it is possible to address many creatures at once using radiospeech, although maintaining a conversation with more than one creature at a time is as difficult as speaking with multiple people simultaneously. Radiospeech relies on words, so two creatures must understand the same language to communicate by radiospeech. Some items can listen to or broadcast radiospeech, allowing creatures without this ability to participate in radiospeech conversations. Radiospeech cannot penetrate 10 feet of stone or wood, three feet of water, or an inch of metal. Intervening objects and radio noise can interfere with the radio signal and reduce the range by a factor of two to twenty or more depending on how bad the interference is. Electrically conducting objects provide the worst interference. If the creature is inside a building or is surrounded by construction or metalwork their radiospeech range will be divided by a factor of at least fifty. Rainfall and terrain that's mountainous or lightly forested will likely halve the radiospeech range. [/QUOTE]
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