Firmware · 2024-01-12

Uniden SDS200 firmware 1.03.04 sub / 1.23.03A main (Motorola Type II test)

Verified — manufacturer file

Download zip (4.2 MB) Manufacturer's page ↗

Test sub firmware 1.03.04 plus an optional diagnostic main 1.23.03A, issued by Uniden on 12 January 2024 for the Motorola Type II investigation. Per Uniden's readme, 1.03.04 reverts the FS-counter reset conditions to the pre-Waterfall method; 1.23.03A shows which demodulator (IQ or 4FSK) is in use when the scanner is powered on while holding AVOID. The package also carries the public main 1.23.03 and sub 1.03.02 for going back.

Read before installing. TEST BUILD - superseded by public sub 1.03.05 (19 January 2024). Not compatible with main 1.21.00 or older. Sentinel cannot overwrite these versions; revert manually with the included public files. This package is the only located file source of public main 1.23.03.

Product: SDS200 firmware
Version: 1.03.04 sub / 1.23.03A main (Motorola Type II test)
Released: 2024-01-12
Runs on: Any PC that can copy files to a USB mass-storage device (Uniden's steps use Windows Explorer)
Applies to: Uniden SDS200
Zip SHA-256: 1921fe255ff1c4760780cb7652522fa7687323ae247418e2a95211fb98c51b32

File	Size	SHA-256
SDS200 Motorola Type2 test Sub V1.03.04.zip	4.2 MB	1f640f9cbe64585c631067c616f55067d53683efe391bdb55664be34aae14232
README.txt	These instructions
SHA256SUMS	Checksums of the files above

Instructions

The complete README.txt included in the zip:

Uniden SDS200 firmware 1.03.04 sub / 1.23.03A main (Motorola Type II test)
==========================================================================

WHAT THIS IS
Test sub firmware 1.03.04 plus an optional diagnostic main 1.23.03A, issued by
Uniden on 12 January 2024 for the Motorola Type II investigation. Per Uniden's
readme, 1.03.04 reverts the FS-counter reset conditions to the pre-Waterfall
method; 1.23.03A shows which demodulator (IQ or 4FSK) is in use when the
scanner is powered on while holding AVOID. The package also carries the public
main 1.23.03 and sub 1.03.02 for going back.

IMPORTANT: TEST BUILD - superseded by public sub 1.03.05 (19 January 2024).
Not compatible with main 1.21.00 or older. Sentinel cannot overwrite these
versions; revert manually with the included public files. This package is the
only located file source of public main 1.23.03.

This is a TEST build that Uniden distributed during a fault investigation. It
is kept for the record; a scanner should run the current public release.

APPLIES TO
The Uniden SDS200 (US model) only. Every firmware file carries the model name
(SDS200_...). Do not use it on the SDS100, SDS150, BCD436HP or BCD536HP. The
European SDS200E uses separately named firmware files (e.g.
SDS200E_V1_23_09.bin, per RadioReference owners) and must not be given these
files.

BEFORE STARTING
  - A Windows PC. Uniden's instructions use Windows Explorer; the scanner
    appears as an ordinary removable disk.
  - The supplied USB cable, in the mini-USB port on the scanner's front panel.
  - The SDS200's power supply connected for the whole update. (Some of
    Uniden's SDS200 readmes say "make sure the battery is fully charged"; the
    SDS200 has no battery, so this is carried over from the SDS100 text.)
  - A backup: copy the whole microSD card to the PC and save the Favorites
    Lists in Sentinel first (Uniden's readme asks for both).
  - Main firmware newer than 1.21.00 (Uniden: the test sub is not compatible
    with main 1.21.00 or older).

CONTENTS OF THIS ZIP
The download zip holds the vendor file exactly as Uniden published it, plus
this README.txt and SHA256SUMS.

  SDS200 Motorola Type2 test Sub V1.03.04.zip  (4450018 bytes)
    SHA-256 1f640f9cbe64585c631067c616f55067d53683efe391bdb55664be34aae14232

  Inside SDS200 Motorola Type2 test Sub V1.03.04.zip:
    SDS200 Public Latest versions/SDS200_V1_23_03.bin
      public main firmware 1.23.03 (28 Dec 2023), for going back
      2162688 bytes
      SHA-256 8b611cc1b198d6b4d21a9eb4fc525045f0e6645e583da831af35769d7bb54779
    SDS200 Public Latest versions/SDS200-SUB_V1_03_02.firm
      public sub firmware 1.03.02, for going back
      88816 bytes
      SHA-256 01cc450f9633c33e3c3a99a19c33adac1f570b983431af9304a7fc9a02930dcf
    Readme SDS200 Sub Motorola type 2 test V1_03_04.txt
      Uniden's own instructions
      3517 bytes
      SHA-256 9de31417d2e4318552b35ff73f362283b3dce8cb70ca176b8bb2f161d7796858
    SDS200_V1_23_03A.bin
      optional diagnostic main firmware 1.23.03A
      2162688 bytes
      SHA-256 7179663eecea8a52da6b40bbbf203878f93117aa221690b3aa4b609272767f39
    SDS200-SUB_V1_03_04.firm
      test sub-processor firmware 1.03.04
      88848 bytes
      SHA-256 b7997373db4b41b79e84043606a92ecbaab2d4fcbbbe266ea2a597763a56bd06

INSTALLATION
  1. Turn the scanner on.
  2. Connect it to the PC with the USB cable. The scanner shows "USB Cable
     Detected / Select USB mode" with "Mass Storage = E" and "Serial Port =
     .".
  3. Press E (Yes) to choose Mass Storage. The scanner shows "USB Mass
     Storage".
  4. In Windows Explorer, open the new removable disk, then the "BCDx36HP"
     folder, then its "firmware" folder. It already holds CitiTable_V00_00.dat
     and ZipTable_V00_00.dat - do not touch or delete them.
  5. Unzip the download on the PC and copy the test sub file
     SDS200-SUB_V1_03_04.firm (and, optionally, SDS200_V1_23_03A.bin) into the
     "firmware" folder. Only one main (.bin) and one sub (.firm) file may be
     in the folder at a time; with several versions present the update will
     not start or will load incorrectly.
  6. Restart the scanner ("reset the power", in Uniden's words). The update
     starts automatically as it boots. Do not turn the scanner off until the
     update has finished.
  7. When it has finished, the scanner deletes the firmware file(s) from the
     "firmware" folder by itself.

VERIFYING
Menu -> Settings -> See Scanner Information -> Firmware Version shows the main
and sub versions now installed. The firmware file(s) will also have gone from
the card's "firmware" folder.

IF SOMETHING GOES WRONG
  - Update did not start: check that only one main and one sub file are in the
    "firmware" folder and that the file names are exactly as supplied.
  - Scanner will not start properly after files were deleted from the
    "firmware" folder: the two .dat files were probably removed. Uniden's
    remedy is Sentinel -> Clear User Data, which rebuilds the card but erases
    all user data (hence the backup).
  - USB connection fails or is slow: take the microSD card out and use a card
    reader; Sentinel can work on the card directly (see Vol 5 on this site).
    The same folder layout applies.
  - Card errors: back up what is readable, format the card with the SD
    Association's SD Memory Card Formatter (cards up to 32 GB), run Sentinel
    -> Clear User Data, then Update Firmware.
  - Uniden does not document a recovery procedure for an update interrupted by
    power loss; this could not be confirmed from any source. Uniden's readme
    closes with "Please use these files on your risk."

DOWNGRADING
Uniden's readme: Sentinel cannot overwrite this test version because its
number is higher than the version on Uniden's server. To go back, copy the
public files included in this package the same way. A later public release
(sub 1.03.05 or newer, installed by Sentinel) also replaces it.

PROVENANCE
  - Official source:
    https://info.uniden.com/twiki/pub/UnidenMan4/SDS200FirmwareUpdate/SDS200%20Motorola%20Type2%20test%20Sub%20V1.03.04.zip
  - Listed on:
    https://info.uniden.com/twiki/bin/view/UnidenMan4/SDS200FirmwareUpdate
  - Wayback copy: none captured
  - Retrieved: 2026-09-18. Status: verified (downloaded from Uniden's own
    server).

MORE INFORMATION
  - scanners.fubsypoly.com, Uniden SDS200 - Vol 5, Upgrades & Firmware:
    https://scanners.fubsypoly.com/uniden-sds200/vol-5/
  - Reference Library, SDS200 Owner's Manual:
    https://scanners.fubsypoly.com/library/sds200om/
  - Reference Library, Easier to Read SDS100/SDS200 Manual:
    https://scanners.fubsypoly.com/library/easier-to-read-sds100-200-manual/
  - Uniden change log:
    https://info.uniden.com/twiki/bin/view/UnidenMan4/SDS200FirmwareUpdate
  - RadioReference thread on the Motorola Type II test builds:
    https://forums.radioreference.com/threads/sds-100-200-motorola-type-ii-public-beta.467806/

Other versions of SDS200 firmware

1.26.01 main / 1.03.15 sub · 2026-03-27Recommended
1.24.00 main · 2025-12-20
1.23.20 main · 2025-10-17
1.23.15 main / 1.03.06 sub · 2025-03-24
1.23.07 main · 2024-03-22
1.03.05 sub · 2024-01-19
1.03.03 sub (Motorola Type II test) · 2024-01
1.23.02 main / 1.03.02 sub · 2023-12
1.21.00 main / 1.02.01 sub · 2022-06-29

← All Uniden SDS200 downloads

Uniden SDS200 firmware 1.03.04 sub / 1.23.03A main (Motorola Type II test)

Contents

Instructions

Other versions of SDS200 firmware