The CMX7241/CMX7341 provides a common platform to support digital and analogue FDMA and 2-slot TDMA PMR/LMR.
Based on CML’s FirmASIC® component technology, a Function Image™ (FI) upload determines the CMX7241/CMX7341 overall function and operating characteristics. The CMX7241 and CMX7341 provide the same system functionality and can accept the same FI but are targeted at different system implementations:
The combination of CMX7341 and CMX994A/E ICs enables a small, low cost, low power consumption multi-standard PMR/LMR system to be realised.
Four Function Images are available, these can be downloaded from the CML Technical Portal (contact for access):
Devices are available through our distributors below:
dPMR™ Air Interface + Analogue PMR/LMR – Function Image™ 7241/7341FI-1.x
DMR Air Interface + Analogue PMR/LMR – Function Image™ 7241/7341FI-2.x
NXDN + ARIB STD-T98/102 + Analogue PMR – Function Image™ 7241/7341FI-3.x
Function Image™ Roadmap includes:
Other features include: two auxiliary ADCs with four selectable inputs, four auxiliary DAC interfaces (with an optional RAMDAC on the first DAC output, to facilitate transmitter power ramping), GPIO and System Clock possibilities.
The devices have flexible powersaving modes and are available in the following packages: VQFN (CMX7241 and CMX7341) and LQFP (CMX7241 only).
Q: When using the CMX7341 I/Q AGC functionality, the currently used I/Q AGC step is reported back in the Aux 1 Data and Status Register ($A9). How do these steps relate to the current actual gain settings within the CMX994A/CMX994E and CMX7341 devices?
A: The gain adjustment steps are automatically controlled by the CMX7341 when I/Q AGC is enabled. When setting the optimal I/Q input signal level the CMX7341 will adjust its analogue input gain stage and LNA/VGA gain stages of the CMX994A/CMX994E. The reported step gain breakdown is as follows:
|AGC Steps||CMX994AE LNA Gain dB||CMX994AE VGA Gain dB||CMX7341 Input Gain dB||Total Gain dB
A pair of scripts to realise analogue PMR voice transmission. Requires 2 x PE0403-734x Evaluation kits and 2 x PE0003 Controller kits.
||The PE0003 Evaluation Kit Interface Card is a global interface system for use with evaluation kits for CML’s new generation ICs, including FirmASIC™ based products. This greatly simplifies the approach to the evaluation and design-in process.
|PE0403||The PE0403 Platform Evaluation Kit is designed to assist in the evaluation and application development of the CMX724x and CMX734x ranges of FirmASIC® products.
PE0403 724x Board Schematics. – Download
PE0403-734x Board Schematics. – Download
PE0403-7241 PE0403-7341 Quick Start. A simple guide to help users get started evaluating with the PE0403-7241 and PE0403-7341. – Please register or login to download
PE0403-7341 Quick Start. A simple guide to help users get started evaluating the CMX7341 using a Direct Conversion Receiver, the CMX994E, as an analogue PMR receiver. Kits required: PE0403-7341, EV9942E and PE0003.- Please register or login to download
C-BUS Guides. Guides to operation and interfacing. – Download
|DE9945||The DE9945 is a compact demonstration/evaluation platform for a range of digital and analogue PMR technologies including 2-slot TDMA Digital Radio (DMR) and 6.25kHz FDMA systems.
Q: How do you restore operation from a ‘bricked’ DE9945?
A: If using LPCXpresso, then follow these instructions to upgrade the LPCLink2 for CMSIS-DAP. Problems have been found due to incompatibility between the LPCLink2 and later versions of LPCXpresso; version 7.9.2 on. These later versions of LPCXpresso require the LPC-Link 2 to be configured for using “CMSIS-DAP” mode. This can be done by reprogramming the LPC-Link2 using NXP’s software update utility.
With the LPC-Link2 connected to the DE9945 and the boards powered on:
Open LPCXpresso with the DE9945 project selected.
Click the program flash button.
Set the dialog to program the DE9945 with the DE9945_Script_1_1.axf and the option “erase only required pages” selected. This will restore the GUI.
Power down the DE9945.
Connect the DE9945 USB connector to the PC and disconnect the LPC_Link2.
Power up the DE9945 and press the star (*) key. The DE9945 should display “GUI Mode Version 1.1”.
Follow the instruction in the DE9945 User Manual to;
Start the DE9945 GUI app, ES994510.exe, on the PC.
For DE9945 kits fitted with a CMX994:
For DE9945 kits fitted with a CMX994A:
Power cycle the DE9945.
The display will read, “DE9945 Demo….” briefly. Followed by, “CML DMR Demo. Version 2.x.x.x”.
The DE9945 should now function as normal.
If the” CML DMR Demo..” message is displayed briefly and followed by, “Error 04.00 01/01. EEPROM error”, this means the write-protected EEPROM has also been erased.
The EEPROM contains configuration information vital to operation of the DE9945. If erased, the DE9945 will not function further to protect itself from damage. To restore the EEPROM data send the serial number of the DE9945 to CML Tech Support, explaining that the DE9945 EEPROM has been erased. CML will return the configuration data which must be entered using the keypad functions by selecting and writing each parameter.
DE9945 FI1.x Demo Scripts – Download
A set of scripts to demonstrate PMR and dPMR operation on the DE9945. The scripts run in GUI mode and require a USB connection to a PC. The GUI application can be downloaded from the Knowledge Base tab.
Voice demo 12.5k BW – Download
This script uses two back-to-back DE9945 boards to demonstrate dPMR voice mode using an AMBE coded 1031Hz tone. The channel bandwidth is 12.5kHz.
DE9945 DMR BER Evaluation – Download
Test DE9945 receiver BER using a DMR burst sequence from an Anritsu S412E (dm2_bs_511(O.153) or RF test set generating the same sequence in voice payload frames. MS and BS sourced bursts are supported. A readme.txt file is provided to help with board and script configuration. One DE9945 is required.
DE9945 Board Schematics. Version A06. – Please register or login to download
DE9945 Firmware. DE9945 Firmware upgrade package version 126.96.36.199. See the attached version.txt for change information. – Please register or login to download
DE9945 Source. Version 188.8.131.52. The complete C project for NXP LPCXpresso toolchain. – Please register or login to download
C-BUS Guides. Guides to operation and interfacing. – Please register or login to download
DE9945E Board Schematics. Version A03. – Please register or login to download
DE9945A/E Support Pack. DE9945 BOM version A06 and DE9945E BOM version A03. – Please register or login to download
DE9945 Evaluation in Win OS. A GUI for Windows giving control of the CMX7341 and CMX994A in the DE9945. The GUI gives direct register access or runs a simple scripting language. Please see the PE0003 User Manual for driver installation instructions. The USB driver in this package is signed and so may not be compatible with older Windows computers. Version 1.2. – Please register or login to download
DE9945 Evaluation in Win XP. A GUI for Windows XP giving control of the CMX7341 and CMX994A in the DE9945. The GUI gives direct register access or runs a simple scripting language. – Please register or login to download
DMR I/Q Rx – Improving the Rx 2nd adjacent channel rejection with the default DE9945 configuration – Please register or login to download
DE9945 – Product Introduction Video. View
De9945 – Demo with Motorola Radio. View