What is the difference between DMR and P25?

P25 is the digital standard for public safety grade two-way radios. DMR (Digital Mobile Radio) is the private industry version of a digital standard. Radios from multiple vendors designed with the DMR standard are guaranteed to work with each other.

How does a P25 system work?

In P25 digital mode, the P25 transmitter will convert all analog audio to packets of digital information by using an IMBE™ vocoder, then de-vocode the digital information back to analog audio in the receiver. Error correction coding is added to the digital voice information as well as other digital information.

What is APCO 25 phase2?

Project 25 Phase II “TDMA” The Phase II standard is a 2-slot TDMA signal that fits inside a 12.5 kHz wide channel, providing a two 6.25 kHz-equivalent channels. Fixed site output modulation is H-DQPSK with subscriber units using H-CPM on the input.

What is P25 system?

P25, or Project 25, is a suite of standards developed to provide digital voice and data communication systems suited to public safety and first responders. Project 25 was initiated by the Association of Public Safety Communications Officials, or APCO.

What does a Peripheral Interface Controller ( PIC ) do?

Peripheral Interface Controller (PIC) is a microcontroller from Microchip Technology. It is a Reduced Instruction Set Computer (RISC) that has been developed to achieve good performance from the use of a small optimized set of instructions. It comes in many different packagings that suit several simple and complex applications.

How is an A / D module in peripheral interface controller?

An A/D module in Peripheral Interface Controller comprises of 5-inputs for 28-pin devices & 8-inputs for 40-pin devices. The operation of the A/D converter is controlled by special registers like ADCON0 & ADCON1. The upper and lower bits of the converter are stored in registers like ADRESH and ADRESL.

What is the name of the arm peripheral controller?

PL080 is a synthesizable DMA controller supporting one AHB master interface and eight DMA channels. The DMAC is an Advanced Microcontroller Bus Architecture (AMBA) compliant System-on-Chip (SoC) peripheral that is developed, tested, and licensed by Arm Limited.

How is SPI used in a PIC microcontroller?

The term SPI (Serial Peripheral Interface) is used to send information between PIC microcontroller and other peripherals like sensors, SD cards, and shift registers. This microcontroller supports 3-wire SPI communications between two devices on a common CLK source.