Radar Basics

Radar J- Scope

A-scope

J-scope

„Senderzacken“
pulse of the transmitted power

Target

Figure 1: Difference between the A-scope and J-scope

A-scope

J-scope

„Senderzacken“
pulse of the transmitted power

Target

Figure 1: Difference between the A-scope and J-scope

Radar J- Scope

The J-Scope (also-called circular sweep scope) uses deflection modulation like the A-scope. The difference between the two kinds of scopes is that the A-scope uses a linear deflection, and the J-scope uses a circular deflection. This provides a better resolution on the screen by using the same screen-size.

The deflection begins top at the screen and shows a pulse caused by the transmitter, the so-called “Senderzacken”. Then the deflection drifts clockwise and the next pulse is the echo-signal. A scale is engraved at the screen for measuring the range.