Instruction Manual

Instructions for use of MK9A Transmitter

Contents:

I. Introduction

II. Operation

- Antenna

- On/Off function

- Programming and Initialization

I. Specifications

I. Introduction:

The MK9A transmitter is a portable, low power, single-frequency, pulsed transmitter designed for rugged

service in a variety of environmental conditions. The transmitter and a 3.6V lithium battery are housed in a

hermetically canister, with a mounting tab for convenient mounting. The 18” long permanently attached

antenna is made of flexible, Teflon



[PTFE] coated wire. The MK9A emits a train of unmodulated RF

pulses, with pulse width, pulse period, and frequency factory configurable. For operation under MURS

rules, the transmitter may be factory programmed to any of the following frequencies (151.820, 151.880,

151.940, 154.570, and 154.600MHz).

II. Operation:

Antenna –

The MK9A antenna is constructed of PTFE coated multi-strand stainless steel cable and is designed for

easy deployment in a variety of configurations. Note that best radiated power will be obtained when the

antenna is deployed in open air, away from conductive objects. The antenna can be coiled, placed near

conductive objects, or otherwise compacted without damage to the unit. However, the effective range of the

transmitter may be reduced as a result.

On-Off Function –

The only user-controlled feature of the MK9A is the on-off function. Placing a magnet over the arrow

marker on the package (see fig 1a) causes the transmitter to shut down. Removing the magnet initiates the

transmitter. Note that the transmitter indicates a clean restart by sending a series of 5 pulses in rapid

succession when the magnet is removed.

Programming and Initialization –

The following parameters of the MK9A are factory configurable:

- Frequency (select from any of the 5 MURS frequencies)

- RF Pulse Width (15-250msec) 20msec standard

- Pulse Period (400-2000msec) 800msec standard

Maintenance-

Since the MK9A is sealed in a hermetic package, it is not user serviceable. Contact the factory for

reprogramming or battery replacement.

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Instructions for use of MK9A Transmitter Contents: I. Introduction II. Operation - Antenna - On/Off function - Programming and Initialization I. Specifications I. Introduction: The MK9A transmitter is a portable, low power, single-frequency, pulsed transmitter designed for rugged service in a variety of environmental conditions. The transmitter and a 3.6V lithium battery are housed in a hermetically canister, with a mounting tab for convenient mounting.
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Instructions for use of MK9A Transmitter III. MK9A TRANSMITTER SPECIFICATIONS: Available Frequencies 151.820, 151.880, 151.940, 154.570, 154.600MHz Frequency Tolerance ±2ppm over operating temperature range Temperature Range Operating: -30 to +50°C Storage: -40 to +60°C Modulation Type 1k0N0N (Unmodulated RF pulses) Pulse Width 20msec standard (15-250msec upon request) Pulse Period 800msec standard (400-2000msec upon request) Power Output 20mW maximum peak at 3.
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Instructions for use of MK9A Transmitter Figure 1: External Views fig 1a) Magnet Arrow Marker Location – Magnet shown in place (transmitter ‘off’) fig 1b) FCC and Manufacturer ID labeling 3