Two impact craters on Olympus Mons have been assigned provisional names by the International Astronomical Union. The western portion of the volcano lies in the Amazonis quadrangle (MC-8) and the central and eastern portions in the adjoining Tharsis quadrangle (MC-9). The volcano is located in Mars's western hemisphere, with the center at 18☃9′N 226☁2′E / 18.650°N 226.200☎ / 18.650 226.200, just off the northwestern edge of the Tharsis bulge. Its mountainous nature was suspected well before space probes confirmed its identity as a mountain. It had been known to astronomers since the late 19th century as the albedo feature Nix Olympica (Latin for "Olympic Snow"). Olympus Mons is the youngest of the large volcanoes on Mars, having formed during Mars's Hesperian Period with eruptions continuing well into the Amazonian. It is the largest and highest mountain and volcano of the Solar System, and is associated to the Tharsis Montes, a large volcanic region on Mars. Olympus Mons is about two and a half times Mount Everest's height above sea level. The volcano has a height of over 21.9 km (13.6 mi or 72,000 ft) as measured by the Mars Orbiter Laser Altimeter (MOLA). Olympus Mons ( / ə ˌ l ɪ m p ə s ˈ m ɒ n z, oʊ ˌ-/ Latin for Mount Olympus) is an enormous shield volcano on the planet Mars. Largest and tallest mountain in the Solar SystemĢ6 km (16 mi) local relief above plains The table below shows the potential recording capacity of the recorder with different-sized microSD and microSDHC memory cards.
Recording Mode Maximum Recording Dictation Time PCM 48 kHz mode 5 hours, 25 minutes PCM 44.1 kHz mode 5 hours, 55 minutes MP3 320 kbps mode 26 hours, 00 minutes MP3 256 kbps mode 32 hours, 30 minutes MP3 128 kbps mode 65 hours, 30 minutes MP3 mono mode 131 hours, 00 minutes WMA 128 kbps mode 64 hours, 00 minutes WMA 64 kbps mode 128 hours, 00 minutes WMA 32 kbps mode 257 hours, 00 minutes WMA mono mode 1007 hours, 00 minutes Using removable memory media can expand the recording capacity of the DM-620. The table below shows the maximum dictation times possible using the built-in 4GB memory (assuming there are no other files saved in the recorder). This usage will reduce the amount of memory available for recording new files. Podcast and Audible files use up portions of the recorder's built-in flash memory, as do files saved on the recorder when it is used as a USB flash drive (aka 'thumb drive'). If Reverb is to be used, Noise Cancel, EUPHONY and Voice Filter cannot be selected.
The settings that can be saved as a Playback Scene are Noise Cancel, EUPHONY, Voice Filter, Play Mode, Play Speed, Skip Space, Backlight, LED and Reverb.
The DM-620 has an option for the user to create up to five Playback Scenes to setup the recorder to preset playback scenarios. Record Setting Conference Lecture Meeting Dictation Mic Select Central Mic ON Central Mic ON Central Mic ON Central Mic ON Mic Sense High High Middle Low Rec Mode MP3:128 kbps MP3:128 kbps MP3:128 kbps MP3:mono Rec Level Auto Auto Auto Auto Zoom Mic Off +6 Off Off Low Cut Filter On On On On VCVA On/Off:Off On/Off:Off On/Off:Off On/Off:Off Standby Off Off Off Off There is also a DNS (Dragon Naturally Speaking) scene mode that uses proprietary settings not found in the menu for optimizing dictation files for voice-to-text transcription using the Nuance Dragon Naturally Speaking software. Only the listed functions are affected when a User Settings recording scene is saved. The table below shows the menu settings that are applied in each of the preset Recording Scenes as well as the default settings when Rec Scene is set to Off. The recorder's current configurations will be saved as a scene.