Transmitters

The transmitter modules plug into the Daniels Subracks and are modular in construction. Inside each transmitter, the Main Board, the Audio Processor, the Amplifier and the Synthesizer are each individually assembled and tested which facilitates tuning and maintenance.

All transmitters are constructed with anodized aluminum and stainless-steel hardware. The circuit boards are glass-epoxy construction with gold-plated module connectors. They comply with FCC and IC standards at the time of manufacture and comply with IEEE 1101, DIN 41494 and IEC 297-3 for mechanical dimensions.

Daniels transmitters and receivers have been specifically designed for extended reliable operation under extreme environmental conditions and draw minimal current, making them ideal for installation in transportable systems or at remote solar cell powered sites.

MT-4E TX (Analog or P25 Digital)

The MT-4E transmitters offer high performance and low current consumption and are capable of 12.5 kHz (narrowband) 25 kHz (wideband) operation (analog only). Daniels P25 transmitters can be used in repeater or base station configurations and may be operated in digital P25, analog or mixed mode. If a firmware upgrade is purchased they may also be programmed for 12.5 kHz P25 digital operation. An encryption module may also be purchased for secure digital communications.

Settings such as Frequency, CTCSS, NAC and analog/digital/mixed mode operation are PC programmable via the Daniels Radio Service Software (RSS) which can be connected to the transmitter through the front panel USB port. The transmitters can be programmed with up to 2 banks of 16 channels each. An optional external frequency input can be enabled on the transmitter to allow higher frequency stability than the standard of ± 1.0 ppm (VHF) or ± 0.5 ppm (UHF).

 

P25 Firmware (APP-RSS03-WC-xx)

Field flashable upgrade for MT-4E TXs allows P25 digital channels.

P25 Encryption Module (ENCRYPT-MT4E-xx)

Field installable upgrade for MT-4E TXs allows AES-256 or DES-OFB 64-bit encryption for secure P25 digital channels. The encryption module is compliant to the security requirements of FIPS 140-2. A software package APP-FIRM30-W-XX Encryption Firmware is also required with the encryption module.

Note: Subject to export control outside of North America.

Analog AM TXs

AM transmitters are available in 8.333 kHz and 25 kHz channel steps in the VHF AM 118 – 137 MHz aeronautical frequency band. Various ground-to-air crossband configurations are possible by using AM TXs. A distinguishing feature of Daniels AM transmitters is that the handle on the front panel contains a digital display and buttons to enable programming of channel 16.

 

Lowband TXs

Daniels MT-3 analog FM VHF Lowband transmitters operate in 20 kHz channels. They operate in one of two frequency bands: 29 MHz to 38 MHz or 38 to 50 MHz. They can be programmed to have up to 16 channels.