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'''GRE COM PSR-800 scanning receiver'''
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=GRECOM PSR-800 Digital Trunking Scanning Receiver=
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The PSR-800 was manufactured by GRE America in China. The first scanner model to be Micro SD based as well as bring the Radioreference Database (RRDB) and EZScan on said card. After an initial few hiccups, the firmware, was reworked to bring, the new at the time, very first APCO's P25 Phase II to scanner market, in the death-throws of GRECOM America, as well as the companies last update. Shortly afterwards, all intellectual property for this product was acquired by The Whistler Group. This model became Whistler's genesis model for which they rebranded and released, the additional badge-engineered models, as their own model WS1080, also manufacturing for RadioShack the RS Pro-668 branded equivalent.  Three additional models with direct ancestry, the RS Pro-18 lacking certain features, the WS1095 with additional numeric and function keys on the keypad and their newest overhauled version of a handheld, the TRX-1 in the same form factor.
  
[[Image:PSR-800LG.jpg|right|thumb]]
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After, a series of hacks, showed promise of bringing the scanners up-to the current WS1080/WS1095 firmware, with new fixes & features and DMR; Whistler began its paid [[Whistler Official Upgrade (WOU)]] program to satiate the formerly-abandoned-product to become current.  Standard PSR-800's Utilizes GRE's EZ-Scan software to program and update the RRDB, as well to upgrade firmware with either a USB Mini-B (4-Pin) cable or with a PC based SD card reader. The scanner and it's further iteration have been known to be highly sensitive but can easily be overwhelmed by strong nearby signals.
  
The PSR-800 is manufactured by GRE in China.
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All features and spec's listed below are what the scanner was until, at the latest, May of 2017. For Upgraded details, specs and info, refer to the [[WS1080|Whistler WS1080 page]]. The only difference between the models - seemly are a few bits in coding as well as where a few components that were deprecated, before, Whistler could purchase more and they had to source different but equivalent parts. To tell the difference between modified versions of the PSR-800 - a quick power-up the GRE splash logo will be displayed if it's a standard 800; if it's a Whistler variant: the Whistler logo will appear then after splash screen press the MENU Key to see the Bootloader version WOU is F Ver 2.0.
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<div style="float:center;">__TOC__</div> [[Image:PSR-800LG.jpg|270px|right]] 
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==Specifications==
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=== Features===
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* 200 Scan Lists
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* 200 V-Folders
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* 20 ScanSets
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* PSR-800 [http://web.archive.org/web/20110125112814/http://www.greamerica.com/download/specs/PSR-800.pdf  here| Brochure download].
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* [http://www.greamerica.com/download/manuals/PSR-800_Manual.pdf| User's Manual] and [http://www.greamerica.com/download/EZScanDGInstall_v1.08.zip| EZ ScanDG] Utility Manager can be downloaded from [http://www.greamerica.com/ GREAmerica.com].
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* The PSR-800 uses a normal USB a to Mini-B programming/control/updating uploading/downloading cable. USB 2.0 Compliant Interface Built In logical device and installs drivers for both the Scanner and the MicroSD card. * Please see the [[Connecting scanners via USB]] article for USB cables to connect your PC to the scanner
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* Recording/Playback of Objects or all received audio, at a set volume unchanged by the volume control.
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** Audio codec is AU format and is Time/Date stamped at the header file of the audio sample.
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*** AU audio files can be played via Windows Media Player, WinAmp, and other players.
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** Extra Info such as frequency, TGID, etc. can be seen using the included software.
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* Clock display while "off" (and connected to external power)
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* Auto power-on ("Alarm Clock")
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* Password at Power-on (Optional)
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* [http://en.wikipedia.org/wiki/Object_oriented Object oriented memory management]. See the [[Object Oriented Scanning Described]] article for more information.
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* Object capacity Variable, with the included 2GB MicroSD Card: > 10 million, but varies depending on user configuration, including recording
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* Built in IF discriminator data output can be enabled to the headphone jack and can be used with [http://wiki.radioreference.com/index.php/Unitrunker UniTrunker], [http://groups.yahoo.com/group/TRUNK88 Trunk88], and [http://www.thebriarpatch.org/treport/ Treport] decoders with a standard stereo audio patch cord.
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* Built in discriminator data output in simple ASCII output using the PC/IF port can be sent to a com port or internal microSD card.
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* Tri-color alert LED - Object programmable; eight factory default colors to any color / brilliance you want by having direct access to the R-G-B drive values (including flash) to assign to talkgroups, frequencies, agencies, etc. Example settings are shown in the owners manual.
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** LATCH option: the color of the last received Object stays on until reset.
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* Audio alert tones
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** Scanner option to look for the Site with the best received CC decode rate (Roam Only).
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* ScanSets: create numerous Scanlists tailored differently to meet user needs.
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One button operation to get to this set.
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* EDACS and Motorola TGID Patch (when used on system), currently in the HEX display format only.
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* Regular LTR trunking with auto-arrange for LCN.
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* [[Spectrum Sweeper]] Near field frequency capture
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* Triple conversion superheterodyne
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* V-Folder - Virtual Scanner Memory Management system (Second generation); One copy of working memory can hold a virtual numbers of objects, meaning any combination of talkgroups or conventional channels, and trunking systems. Each V-Scanner II folder holds one copy of working memory. Actual memory size is determined by the size of the microSD card memory size used.
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* Programmed with all systems in the Radioreference database with ability to update as needed or once a week.
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* Scan rate 70 CPS (without trunk scan)
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* Search speed 80 CPS
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* User defined service search and limit search
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* Default Option keys: return to default setting for any menu
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* [[AGC]] Selectable analog and digital gain control per Site or Per Object
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* Adaptive digital tracking (ADT)
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* Digital signal processing (DSP) speed change via settings
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* Analog to Digital Converter (ADC) injection to/from DSP quantity adjustment via settings
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* Digital to Analog Converter (DAC) injection to/from DSP quantity adjustment via settings
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* [[Continuous Tone-Coded Squelch System|CTCSS]]/[[DCS]] abilities
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* [[NAC|Network Access Code]] can be programmed to only break squelch when receiving the correct NAC in a conventional P25 system.
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* 16-character alpha-tagging with text entry