HINTS AND TIPS
a - NiCad OPERATION
This frequency counter can operate up to six hours from the fully charged internal NiCad batteries. The batteries are charged when
the unit is powered by the supplied AC/DC adaptor. Full recharge will occur in 12 to 16 hours. The batteries should be deep cycled
occasionally by allowing them to completely discharge to maintain maximum battery capacity. The NiCad batteries should last several
years. However; it is recommended that the batteries be checked annually for any sign of leakage or corrosion. Replace all batteries if
any damage is visible.
b - SIGNAL INPUT
When using the counter with an antenna for signal pick-up, random counts may appear. This is normal and is due to the high gain 10 -
16 dB amplifier circuitry amplifying weak signals and noise in the absence of a strong, readable signal. Never exceed the maximum sig-
nal input level as internal damage will occur.
c - ANTENNA SELECTION
The supplied telescopic antenna is the best for general purpose use. This is because its length can be adjusted to suit the frequency.
As a rough guide collapse the antenna to its minimum length for UHF and fully extend it for HF and VHF. An alternative resonant anten-
na may offer better results in some cases.
d - RECEPTION DISTANCE FROM TRANSMITTER
The distance from a transmitter at which a frequency counter can read the signal depends on many factors, such as type and location
of transmitting antenna, transmitter output power, type of receive antenna and any obstacles in the way of signals.
SOME TYPICAL DISTANCES
Transmitter Type
Cordless Phone
Cellular Phone
CB Radio
VHF Two Way Radio
UHF Two Way Radio
Typical Distance In Meters
0.3
3-20
2-8
3-30
3-30
RF SIGNAL STRENGTH BARGRAPH
Frequency
1st Segment
Full Scale
27MHz
7mV
100mV
150MHz
5mV
90mV
800MHz
10mV
200mV
INPUT SENSITIVITY (TYPICAL)
Amplifier:
Impedance:
Range:
Sensitivity:
50 Ohm
50 Ohm VSWR <2:1
1MHz-3GHz
<0.8mV at 100MHz
<6.0mV at 300MHz
<7.0mV at 1.0GHz
<100mV at 2.4GHz
15dBm
FREQUENCY DISPLAY RESOLUTION
Range Gate Time (Seconds) LSD
Sample Display
300MHz
0.0625
10Hz
300.00000MHz
0.25
1Hz
300.000000MHz
1.0
1Hz
300.000000MHz
4.0
0.1Hz
300.0000000MHz
3GHz
0.0625
1000Hz
3000.000MHz
0.25
100Hz
3000.0000MHz
Maximum Input:
