Hints And Tips
N i C d O p e r a t i o n
T h i s f r e q u e n c y c o u n t e r c a n o p e r a t e f o r u p t o s i x h o u r s f r o m i t s f u l l y c h a r g e d
NiCd batteries. They are charged when the unit is plugged into the supplied AC/DC
a d a p t e r . F u l l r e c h a r g e w i l l o c c u r o v e r 1 2 t o 1 6 h o u r s . B e f o r e r e c h a r g i n g t h e
batteries you should be deep cycled occasionally by allowing them to completely
discharge to maintain maximum battery capacity. The NiCd batteries should last
for several years. However, it is a good idea to check them every twelve months
for signs of corrosion or leakage. Always replace the whole set if any one cell
f a i l s
S i g n a l I n p u t
W h e n u s i n g t h e c o u n t e r w i t h a n a n t e n n a f o r s i g n a l p i c k u p , r a n d o m f r e q u e n c i e s
may appear on the display. This is quite normal and is caused by the high gain
of the receiver circuits which amplify noise in the absence of a strong readable
s i g n a l . N e v e r g e t t h e u n i t t o o c l o s e t o a t r a n s m i t t e r a s i n t e r n a l d a m a g e w i l l
result.
A n t e n n a S e l e c t i o n
The suppl ied telescopic antenna is best for general purpose use. This is because
its length can be adjusted to suit the frequency required. Usually you will want
a s h o r t e r a n t e n n a f o r U H F a n d a f u l l y e x t e n d e d o n e f o r V H F / H F .
R e c e p t i o n D i s t a n c e F r o m T r a n s m i t t e r
The distance from which you will be able to receive frequencies will depend upon
the type and location of the transmitting antenna, transmitter output power and
t h e f r e q u e n c y i n u s e .
S o m e t y p i c a l d i s t a n c e s a r e :
Cordless Phone
0.3 meters
Cellular Phone
3 - 20 m
CB radio
2 - 8 m
VHF Two Way Radio
3 - 30 m
UHF Two Way Radio
3 - 30 m
