DCFGermany77.5 kHz

WWVBUSA60.0 kHz

MSFGreat Britain60.0 kHz

JJYJapan40.0 kHz

JJYJapan60.0 kHz

BPCChina68.5 kHz

Two batteries Micro-LR03-AAA power the FSI.
1.1 Handling and display elements
ON/OFF Button, also used to switch between the two operation-modes
bar graph display (18-segments) with scale and operation mode-indication
Symbol “ferrite antenna” with arrows to adjust the FSI to the main receiving direction

1.2 Handling

With the button the FSI is switched ON or OFF and the operation-mode can be changed
1 x pushFSI ON mode "field strength"
1 x pushchange to the mode "signal"
1 x pushFSI OFF
If the FSI is ON and no button is pushed within more than 20 min then the FSI will automatically switch OFF.

2. Function
2.1 Operation modes
Field strength
If the mode "field strength" is selected the FSI shows the available field strength in the corresponding receiving direction. The max. value is obtained once you adjust the unit into its main receiving direction. The field strength of the signal is shown at the bar graph and in the same time the modulation (change of the amplitude) is visualized at the bar graph. If the received signal is nearly free of interference a constant amplitude-pulse is shown (normally one per second).
If the signal is disturbed by interference the display shows irregular peaks (more than one per second).

Signal
If the mode "signal" is selected the FSI provides an additional information which allows an estimation ofthe quality of the received signal with reference to the existing interference.
If there is a signal with no interference then the bar graph shows symmetrical amplitude-pulses to both sides of a “center point”. One peak per second independent of the available field strength will be displayed.