GRE PSR-800 EZ Scan Digital PC application 1.03
===============================================

WHAT THIS IS
------------
GRE's Windows PC application for the PSR-800, "GRECOM PSR-800 EZ Scan Digital
Handheld Trunking Scanner Programming System" (EZScanDG.exe), version 1.03
(file version 1.3.0.207), in GRE's own zip and NSIS installer.

GRE's support site listed 'PSR-800 Software Utility Manager v1.03' (created 8
February 2011, modified 22 August 2011). The installer's files are dated
2011-05-24; the program is file version 1.3.0.207. This is the earliest
PSR-800 PC application found. It predates CPU firmware 1.5 (January 2012, Set
Location) and the Phase II firmware.

What still works in 2026: installing, programming the radio, saving and
loading the configuration, and preparing the microSD card from the Library
snapshot the installer carries. What no longer works: the Update menu's checks
for software, CPU firmware, DSP firmware and Library updates. They used GRE's
update server (scanner-update.com); with GRE gone, the checks find nothing,
and no manufacturer distributes PSR-800 firmware or Library updates any more.

The installer bundles a RadioReference Library snapshot (RRDB and location
database files) exactly as GRE shipped it; this archive does not update or
separate it.

APPLIES TO
----------
GRE PSR-800 (GRECOM EZ Scan-SD Digital). Hardware ID of the USB serial
interface: USB\VID_0C97&PID_0008&MI_01 ("GRECOM PSR-800 Serial Device").

Must NOT be used with:
- a PSR-800 that has been through the Whistler Official Upgrade (boot 2.0): it
  is a WS1080 in software terms and needs the WS1080 driver and WS1080
  EZ-Scan.
- a PSR-800 running unofficial WS1080-derived firmware (CPU 3.x, DSP 3.1-4.6).
- the RadioShack PRO-18 or PRO-668, which use RadioShack's iScan software.
Its CPU update function must never be pointed at firmware for another model:
GREFwTool's notes warn the bootloader then erases the radio's application
firmware.

BEFORE STARTING
---------------
- A Windows PC. On Windows 10/11 the PSR-800 driver is unsigned; the
  RadioReference wiki page "Windows 10 installation of GRE PSR-800 Software
  and Driver" describes installing it with driver signature enforcement
  disabled.
- The PSR-800's mini-USB data cable. The USB jack is also the power and
  charging input.
- Save the scanner's configuration to the PC before changing anything, and
  copy the whole microSD card.
- GRE's manual: power the radio off before connecting or disconnecting
  external power, and eject the card drive before unplugging, or the microSD
  card can corrupt.

CONTENTS OF THIS ZIP
--------------------
The zip published on fubsypoly.com wraps the vendor file(s)
byte-for-byte, unmodified.

EZScanDGInstall_v1.03.zip
    23,031,825 bytes
    SHA-256 607c21544e1ef51979337c63c699ac4a5b4ad6ef5e290d5733e6c5f108594f48
    GRE's zip containing EZScanDGInstall_v1.03.exe, the NSIS installer for
    'GRECOM PSR-800 EZ Scan Digital Handheld Trunking Scanner Programming
    System' (EZScanDG.exe, file version 1.3.0.207), with the PSR-800 USB
    driver INF, help file, user guides and a bundled RadioReference Library
    snapshot.
README.txt
    This file.
SHA256SUMS
    SHA-256 checksums of the files above.

INSTALLATION
------------
 1. Unzip and run the installer (NSIS setup wizard; the individual screens
    were not recorded). It installs the program, the help file, the user
    guides (English and, in 1.08, French), the driver INF (GRECOM_PSR-800.inf)
    and a starter configuration under Documents\EZ Scan Digital.
 2. Install the driver for the PSR-800's serial interface if Windows does not:
    Device Manager > update driver > the INF above, with signature enforcement
    disabled on Windows 10/11 if required.
 3. With the scanner powered OFF, connect the USB cable. The microSD card
    mounts as a drive; close any autorun window.
 4. Start EZ Scan Digital, read the configuration from the card or scanner,
    edit, and write it back.

Firmware updates (historical): with the scanner off and connected, Update >
Check for CPU Firmware Update > Check for Updates > Update My Scanner, wait
several minutes for "Done", then the same for Check for DSP Firmware Update.
These now find nothing because GRE's server is gone.

VERIFYING
---------
The program's About box shows its version. On the radio, GRE's Phase II beta
notes say the version screen is "accessed by pressing menu when the welcome
message is displayed after a power up", where the "uP Appl Ver" line shows the
CPU version. CPU U1.8 or later with DSP U1.3 or later is GRE's Phase II
firmware.

IF SOMETHING GOES WRONG
-----------------------
- Failed CPU update: force CPU update mode by holding MENU while plugging in
  the USB cable, then retry (documented for the WS1080 and matching GRE's
  application from 1.8 onward). With GRE's server gone, the retry itself
  cannot fetch firmware; see the GRE PSR-800 CPU firmware U2.0 and GREFwTool
  entries for the only surviving route.
- Error 03-xx at power-on is a card error, 05-xx a configuration-file error:
  rebuild the card from the PC application. Some microSD brands are reported
  to fail with Error 03-01.
- "Update Failed" on the 2015 CPU 2.0 update was cured for owners by running
  the application as administrator.
- Date lockout (unofficial firmware only): a PSR-800 running unofficial
  WS1080-derived firmware (CPU 3.1 with DSP 4.6) must not have its clock set
  past 2017-05-31, including through this program's option to set the clock to
  computer time; a late-June DSP 3.1 build triggers after 2017-07-01 and
  leaves the unit at "Waiting for USB". Every present-day date is past both,
  and the PSR-800 loses its clock when the batteries are out for more than a
  few minutes. Do not set the clock on such a unit. GRE's own firmware is not
  reported to carry the lockout.

DOWNGRADING
-----------
GRE's application offers no firmware downgrade path: once U1.8 is installed
through it, there is no official way back. The community GREFwTool (in this
archive) can downgrade, outside any manufacturer support.

For the application itself, installing the older 1.03 over 1.08 is not
blocked, but 1.03 predates Set Location and Phase II and gains nothing.

PROVENANCE
----------
- File: EZScanDGInstall_v1.03.zip
- Retrieved from: http://www.greamerica.com/download/EZScanDGInstall_v1.03.zip
- Wayback copy:
  https://web.archive.org/web/20130707165951/http://www.greamerica.com/download/EZScanDGInstall_v1.03.zip
- Date retrieved: 2026-09-18
- Official page:
  https://web.archive.org/web/20130707165818/http://www.greamerica.com/support/index.php?_m=downloads&_a=viewdownload&downloaditemid=1027&nav=0
- Status: verified (from the vendor's own host or a Wayback copy of it)

MORE INFORMATION
----------------
- https://scanners.fubsypoly.com/gre-psr800/vol-5/
- Vendor downloads page (Goliad Products, 2026):
  https://whistlergroup.com/pages/downloads
- Reference Library manual:
  https://scanners.fubsypoly.com/library/gre-psr-800-owners-manual/

