The VLF/eentec AT-9 is a reliable, rugged, low power, field telemetry transmitter. The design features frequency synthesized operation over a 10Mhz range. Frequency band within a specific 10Mhz range must be specified at time of order. Minor frequency changes less than 100Khz, can be made by the user by changing dip switch positions.

Another useful feature of the AT-9 is the high efficiency, well-filtered internal power module that allows the user to adjust the output power from 100mW to 2W.

Typical transmission distance for a line -of-sight link is 100Km. Farther distances can be achieved with a 2W transmitter.

The AT-9 is completely compatible with Monitron radios and can be used as direct replacements in existing telemetry networks. In new networks, the unit transmits data from the PTSbg-x field telemetry instruments.

The unit is housed in an anodized aluminum case. It has a standard pin-out twist lock connector for power and audio input. The standard output connector is a “N” style with UHF or BNC optional. All connectors are wired to the Monitron standard.

Voltage input is between 12VDC to 14.4VDC. The AT-9 contains internal lightning protection circuits for the power and audio inputs.

Options and accessories include VHF frequency band, ¼ wave shorting stub for lightning protection on the RF line, external power supply if the unit is installed long distances from the field telemetry unit, and Yagi antennas.

• Low Power

• Rugged

• Reliable

• 100% Monitron compatible

• Adjustable Output Power
  
  

Frequency Ranges:
(Specify at time of order)

PT06-8-4S
Pin A: Power,
Pin B Audio Input,
Pin C and D Ground