Specifications Overview
This document outlines the technical specifications and limits for various frequency and power parameters related to 406 MHz, 121 MHz, and 243 MHz systems. It includes both internal and external reference frequencies, power levels, and modulation characteristics.

406 MHz Specifications

• Frequency: Internal reference frequency is specified with a tolerance of ±5000 Hz, while the external reference has a tighter tolerance of ±1 Hz.
• Power Level: Ranges from 35 to 39 dBm with an uncertainty of ±1 dBm.
• Phase Modulation: Positive and negative phase deviations are specified between 1.0 to 1.2 rad and -1.0 to -1.2 rad, respectively, with a tolerance of ±0.04 rad.
• Timing: Power rise time is less than 5 ms, and phase modulation rise and fall times range from 50 to 250 μs.
• Spectral Mask: Defined at four corner frequencies with specific dB levels.

121 MHz and 243 MHz Specifications

• Frequency: Both internal and external references have a tolerance of ±50 ppm, with specific frequency ranges provided.
• Power Level: Ranges from 14 to 27 dBm with an uncertainty of ±1.5 dBm.

Audio and Modulation Specifications

• Audio Frequency: Lower and upper limits are specified with a tolerance of ±30 Hz.
• AM Modulation: Sweep range, repetition rate, modulation factor, and duty cycle are defined with specific tolerances.

406 Digital Message and Location

• 15 Hex ID: No verification required for the 15 Hex ID.
• BCH Error Correcting Field: Verification required for BCH1 and BCH2.
• Location: Default values for latitude and longitude are provided, with a distance range of 0 to 100 km.

Limit Tester Specifications
The document concludes with specifications for the limit tester, ensuring compliance with the defined parameters.