TDR resolution of 4170D vs 4300

[wa9zvf]

Is there a difference in TDR resolution for the 4170D vs 4300?


Using firmware version 910B on both units with the same setup:  Velocity factor 0.66, high resolution and 100 feet the 4170 shows a resolution of 0.47 feet and the 4300 a resolution of 0.28 feet.  Why is this?


Ray Mikula

WA9ZVF

[Bob]

Hi Ray,

The time resolution of the TDR function is inversely proportional to the frequency range of the AIM. Since the AIM4300 has a wider range than the AIM4170, the time resolution is better. (FreqRange4170/FreqRange4300)*Resolution4170 = (180/300)* 0.47 = 0.28

--73/Bob