This unique plug-on transmitter design will ideally match any microphone or line level source via a standard XLR connector. The DPR can tune in 100 kHz or 25 kHz steps across the UHF television band from 470.100 to 607.950 MHz, with a selectable output power of 25 or 50 mW. The purely digital architecture utilizes AES 256-CTR encryption for high level security applications.
The transmitter is specially designed with high efficiency digital circuitry for extended operating time on two AA batteries, with status indicated by a multi-color LED. An IR (infrared) port is included to simplify setup with IR enabled receivers. Updates can be made via SD card.
The input amplifier uses an ultra low noise op-amp for quiet operation. It is gain controlled with a wide range, dual envelope limiter, providing over 30 dB of headroom above full modulation. A 24-bit A-D converter digitizes the audio, then filters out supersonic noise above 21 kHz.
Below are links to the current firmware versions for the DPr, DPr/E01 and DPr-A digital transmitters.
These are zip files, after downloading extract them into a temporary folder. Each contains 3 files, one for the microcontroller, one for the FPGA and one bootloader file. Follow the instructions in the DPr Instruction Manual to update firmware. If you encounter problems while updating the firmware please contact the factory for assistance.
How do I decide which firmware version is right for my transmitter?
- If you have DPR or DPR-A version 1.xx FPGA firmware, download dpr_m111_f101_b3.zip.
- If you have DPR or DPR-A version 2.xx FPGA firmware, download dpr_m111_f200_b3.zip.
- If you have DPR/E01 version 1.xx FPGA firmware, download dpr_e01_m111_f101_b3.zip.
- If you have DPR/E01 version 2.xx FPGA firmware, download dpr_e01_m111_f200_b3.zip.
The FPGA firmware version is displayed in the “About” page in the “Settings” menu.
| Download | File | Size | Type | Last Modified |
|---|
DPr
DPr v1.15 (SUPER)/v1.02 (FPGA, H/W v1)/v2.01 (FPGA H/W v2)/v3 (BOOTLOADER)
- Changes for ease of manufacturing. No new features.
DPr v1.14 (SUPER)/v1.02 (FPGA, H/W v1)/v2.01 (FPGA H/W v2)/v3 (BOOTLOADER)
- Changes for ease of manufacturing. No new features.
DPr v1.11 (SUPER)/v1.01 (FPGA, H/W v1)/v2.00 (FPGA H/W v2)/v3 (BOOTLOADER)
- Fix bug where the default frequency was not restored when executing the “Default” action in the Setup menu (or via a serial command).
DPr v1.10 (SUPER)/v1.01 (FPGA, H/W v1)/v2.00 (FPGA H/W v2)/v3 (BOOTLOADER)
- Menu cursors now reset when factory default settings are restored.
- Fixed bug where recording didn’t stop when the SD card became full.
- Added 10 mW RF power level option.
DPr v1.07 (SUPER)/v1.01 (FPGA, H/W v1)/v2.00 (FPGA H/W v2)/v3 (BOOTLOADER)
- Battery percentage reporting is now more accurate.
- Menu cursor positions are now remembered in all menus and submenus, and are only reset at power-on or when the “Defaults” menu option is executed.
- Introduces FPGA firmware version 2.00 for use with newer units with serial number 301 and higher. Version 2.xx and 1.xx FPGA firmware are functionally indentical.
DPr v1.04 (SUPER)/v1.01 (FPGA)/v3 (BOOTLOADER)
- The menus have been reworked for greater congruence with other products. Most notably, standardized IR sync functions have been added to the Key submenu, now named “IR&Key”. “Phase” has been renamed to the more descriptive “Polarty”, and the “About” page was moved to the Setup submenu.
- IR sync prompts and confirmation messages have been standardized to match those on other equipment in this product family.
- Tuning Groups can now contain block information which is not used or displayed by the DPr but which is nonetheless stored and passed on when groups are shared or saved.
- The “Clock” page now shows the date and time with running seconds, and allows edits to the seconds field.
- It is now possible to select the Volatile key policy directly from the menus.
- The “About” page now has a neater appearance.
- BOOTLOADER v3: When updating firmware, long file names now scroll so the entire filename can be seen.
DPr v1.03 (SUPER)/v1.01 (FPGA)
- Fixed a bug wherein the “Default” command didn’t always store the settings if the power was turned off immediately.
- In the event that the FPGA fails to boot, an error message is displayed on the LCD.
DPr v1.02 (SUPER)/v1.01 (FPGA)
- Initial production release.
DPr/E01
DPr/E01 v1.15 (SUPER)/v1.02 (FPGA, H/W v1)/v2.01 (FPGA H/W v2)/v3 (BOOTLOADER)
- Changes for ease of manufacturing. No new features.
DPr/E01 v1.14 (SUPER)/v1.02 (FPGA, H/W v1)/v2.01 (FPGA H/W v2)/v3 (BOOTLOADER)
- Allows transmitting audio while recording.
DPr/E01 v1.11 (SUPER)/v1.01 (FPGA, H/W v1)/v2.00 (FPGA H/W v2)/v3 (BOOTLOADER)
- Fix bug where the default frequency was not restored when executing the “Default” action in the Setup menu (or via a serial command).
DPr/E01 v1.10 (SUPER)/v1.01 (FPGA, H/W v1)/v2.00 (FPGA H/W v2)/v3 (BOOTLOADER)
- Menu cursors now reset when factory default settings are restored.
- Fixed bug where recording didn’t stop when the SD card became full.
- Added 10 mW RF power level option.
DPr/E01 v1.07 (SUPER)/v1.01 (FPGA, H/W v1)/v2.00 (FPGA H/W v2)/v3 (BOOTLOADER)
- Battery percentage reporting is now more accurate.
- Menu cursor positions are now remembered in all menus and submenus, and are only reset at power-on or when the “Defaults” menu option is executed.
- Introduces FPGA firmware version 2.00 for use with newer units with serial number 201 and higher. Version 2.xx and 1.xx FPGA firmware are functionally indentical.
DPr/E01 v1.04 (SUPER)/v1.01 (FPGA)/v3 (BOOTLOADER)
- The menus have been reworked for greater congruence with other products. Most notably, standardized IR sync functions have been added to the Key submenu, now named “IR&Key”. “Phase” has been renamed to the more descriptive “Polarty”, and the “About” page was moved to the Setup submenu.
- IR sync prompts and confirmation messages have been standardized to match those on other equipment in this product family.
- Tuning Groups can now contain block information which is not used or displayed by the DPr/E01 but which is nonetheless stored and passed on when groups are shared or saved.
- The “Clock” page now shows the date and time with running seconds, and allows edits to the seconds field.
- It is now possible to select the Volatile key policy directly from the menus.
- The “About” page now has a neater appearance.
- BOOTLOADER v3: When updating firmware, long file names now scroll so the entire filename can be seen.
DPr/E01 v1.03 (SUPER)/v1.01 (FPGA)
- Fixed a bug wherein the “Default” command didn’t always store the settings if the power was turned off immediately.
- In the event that the FPGA fails to boot, an error message is displayed on the LCD.
DPr/E01 v1.02 (SUPER)/v1.01 (FPGA)
- Initial production release.
