www.radartutorial.eu 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.

Picture gallery of J-scopes

Figure 2: crt type LB13/40 from the Würzburg system has an engraved scale of 0-40 km

J-scope: View of Groundclutter on a screen of Giant Wurzburg Radar

Figure 3: J-scope: View of Groundclutter on a screen of Giant Wurzburg Radar

J-scope used in the German airborne WW2- radar FuG 212 „Senderzacken”- pulse of the transmitted power Target

Figure 3: J-scope as used in the German airborne WW2- radar FuG 212