License Exam Quiz #284
de Steve, AE8AT

The quiz topic this week stems from a historic event that occurred 85 years ago. The location was a radio station located in Gleiwitz Germany (now Poland). One of the radio towers built of larch wood standing approximately 110 meters tall is still in use today. The Nazi propaganda arm and the SS staged an event by dressing prisoners in Polish uniforms, injecting them with drugs and killing them at the radio station. A short anti-Hitler message was broadcast. This “invasion” served as the pretext for the Nazi’s long-planned invasion of Poland. While Hitler had invaded countries prior to Poland, what made this event different were the treaties Poland had with Britain and France. August 31 was the night of the “attack” at the radio station. Germany invaded Poland the next day. On September 3, both Britain and France declare war and WWII is underway. Given the technology of the day it was probably AM and somewhere between 530 and 1600 kHz.  A plaque, entirely in Polish, seems to have 1935 and 243.7 meters (1.231 MHz) but the online-image quality and my Polish are not good. Given that the frequency was likely well below our 160 meter band, we will do our best with the questions.


T3B10 What frequency range is referred to as HF?
A. 300 to 3000 MHz
B. 30 to 300 MHz
C. 3 to 30 MHz
D. 300 to 3000 kHz


G8A11 What is the modulation envelope of an AM signal?
A. The waveform created by connecting the peak values of the modulated signal
B. The carrier frequency that contains the signal
C. Spurious signals that envelop nearby frequencies
D. The bandwidth of the modulated signal


E3B05 Which of the following paths is most likely to support long-distance propagation on 160 meters?
A. A path entirely in sunlight
B. Paths at high latitudes
C. A direct north-south path
D. A path entirely in darkness



Answers:
T3B10 = C
G8A11 = A
E3B05 = D