Page 1
Index
-1-
Page #
Model 103 2
Introduction 2
Specifications 2
Features 2
Controls 2
Hints and Tips 3
Input Sensitivity (typical) 3
RF Signal Strength Bargraph 3
Frequency Display Resolution 3
Model 104 4
Introduction 4
Specifications 4
Features 4
Controls 4
Hints and Tips 5
Input Sensitivity (typical) 6
RF Signal Strength Bargraph 6
Frequency Display Resolution 6
Model 105 7
Introduction 7
Specifications 7
Features 7
Controls 8
Hints and Tips 8
Input Sensitivity (typical) 9
RF Signal Strength Bargraph 9
Frequency Display Resolution 10
Model 106 11
Introduction 11
Specifications 11
Features 12
Controls 12
Hints and Tips 12
Signal Strength Bargraph 14
Optional Accessories 14
Warranty Information 15
Service Information 16
Page 2
Model 103
Introduction
The Model 103 hand-held frequency counter is a more practical counter,
even advanced features such as field strength measurement is
incorporated. It is compact, truly pocket-sized, test instrument designed
for ease of use and dependable performance. Supplied as a complete with
internal NiCd pack, AC wall charger and 7 section telescopic antenna.
IMPORTANT: This unit only works with analog signals
Specifications
Frequency range: 1 MHz - 3 GHz
Weight: 210 g
Size: 80 mm high x 68 mm wide x 31 mm deep
Impedance: 50 Ohms (BNC Socket)
Case: Stamped aluminum with black anodized finish
Battery: Internal 4 x AA 600 mAH NiCd pack
Power: 9 VDC 300 mA
Timebase: Less than 1 PPM at room temperature
Features
l 10 digit Liquid Crystal Display
l Low power consumption (Average 6 hour battery life)
l Supplied with NiCd pack, AC wall charger and telescopic antenna
l Hold switch to lock display
l Low battery indicator
l Ultra sensitive synchronous detector 16 section bargraph to show RF signal
strength
l High speed 300 MHz direct counter with 0.1 Hz resolution
l 4 selectable gate speeds
Controls
1. Power Switch - This slide switch turns the counter on and initiates a 2
second test of all the LCD segments.
2. Range Switch - This should be switched to the 300 MHz position for
frequencies between 1 MHz and 300 MHz and switched to the 3 GHz
position for frequencies between 10 MHz and 3 GHz.
3. Hold Button - This holds the current display and stops the counter from
counting.
Page 3
4. Gate Button - This selects the gate or measurement time. A longer gate
-3-
time allows counting for longer period and results in higher accuracy.
5. Calibration - The calibration adjustment opening is located on the front
panel of the counter. This allows access to the trimmer capacitor that
provides about a 10 PPM adjustment range of the time base oscillator. This
is not usually necessary but to do so read a signal of a known frequency
before adjusting the trimmer for correct frequency display. If you calibrate
at 4.1943 MHz or above then the counter will be more accurate.
Hints and Tips
1. NiCd Operation
This frequency counter can operate for up to six hours from its fully charged NiCd
batteries. They are charged when the unit is plugged into the supplied AC/DC
adapter. Full recharge will occur over 12 to 16 hours. Before recharging the
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
fails.
2. Signal Input
When using the counter with an antenna for signal pick up, random frequencies
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
signal. Never get the unit too close to a transmitter as internal damage will result.
3. Antenna Selection
The supplied 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
shorter antenna for UHF and a fully extended one for VHF / HF.
4. Reception Distance From Transmitter
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
the frequency in use.
Some typical distances are:
Cordless Phone 0.3 meters
Cellular Phone 3 - 20 m
CB radio 2 - 8 m
Page 4
VHF Two Way Radio
3 - 30 m
-4-
UHF Two Way Radio 3 - 30 m
Input Sensitivity ( Typical )
Never make any kind of connection between the RF finder and a
transmitter.
Amplifier: 50 Ohm
Impedance: 50 Ohm VSWR less than 2:1
Range: 1 MHz - 3 GHz
Sensitivity: < 0.8mV at 100 MHz
< 6 mV at 300 MHz
< 7 mV at 1.0 GHz
< 100 mV at 2.4 GHz
Max. input: 15 dBm
RF Signal Strength Bargraph
Frequency 1st Segment Full Scale
27 MHz 7mV 100 mV
150 MHz 5 mV 90 mV
800 MHz 10 mV 200 mV
Frequency Display Resolution
Range Gate Time (Seconds) LSD Sample Display
300 MHz 0.0625 10 Hz 300.00000 MHz
0.25 1 Hz 300.000000
MHz
1.0 1 Hz 300.000000
MHz
4.0 0.1 Hz 300.0000000
MHz
3 GHz 0.0625 1000 Hz 3000.000 MHz
0.25 100 Hz 3000.0000 MHz
1.0 10 Hz 3000.00000
MHz
4.0 10 Hz 3000.00000
MHz
Page 5
Model 104
Introduction
The model 104 hand-held frequency counter is a more professional
counter, even advanced features such as field strength measurement and
auto hold are incorporated. It is compact, truly pocket-sized, test
instrument designed for ease of use and dependable performance.
Supplied as a complete with internal NiCd pack, AC wall charger and 7
section telescopic antenna.
IMPORTANT: This unit only works with analog signals
Specifications
Frequency range: 10 Hz - 3 GHz
Weight: 250 g
Size: 100 mm high x 68 mm wide x 31 mm deep
Impedance: 1 * dual purpose BNC Socket
50 Ohms input for range 1 MHz to 3 GHz
1 Meg Ohm input for range 10 Hz to 50 MHz
Case: Stamped aluminum with black anodized finish
Battery: Internal 4 x AA 600 mAH NiCd pack
Power: 9 VDC 300 mA
Timebase: Less than 1 PPM at room temperature
Features
l 10 digit Liquid Crystal Display
l Hi-Z low range
l Filter to prevent display of random noise
l Automatic hold
l Measures frequency and period
l LED back light
l Beeper
l Low power consumption (Average 6 hour battery life)
l Hold switch to lock display
l Low battery indicator
l Ultra sensitive synchronous detector 16 section bargraph to show RF signal
strength
l High speed 300 MHz direct counter with 0.1 Hz resolution
l 4 selectable gate speeds
Page 6
Controls
1. Power Switch - This slide switch turns the counter on and initiates a 2
second test of all the LCD segments.
2. Amp Switch - This slide switch selects either the 1 Meg Ohm high
impedance amplifier or 50 Ohm amplifier and prescale.
3. Range Switch - This should be switched to the 300 MHz position for
-5-
frequencies between 1 MHz and 300 MHz and switched to the 3 GHz
position for frequencies between 10 MHz and 3 GHz.
4. Lite Switch - This slide switch turns the LCD back light on and off.
5. Filter Switch – This slide switch turns the filter on and off.
6. Function Button - This selects the frequency or period. This button has
four settings. One each for displaying frequency or period as these are
received, and two settings for automatic hold of the first frequency or
period captured.
7. Hold Button - This holds the current display and stops the counter from
counting.
8. Gate Button - This selects the gate or measurement time. A longer gate
time allows counting for longer period and results in higher accuracy.
9. Calibration - The calibration adjustment opening is located on the front
panel of the counter. This allows access to the trimmer capacitor that
provides about a 10 PPM adjustment range of the time base oscillator.
This is not usually necessary but to do so read a signal of a known
frequency before adjusting the trimmer for correct frequency display. If
you calibrate at 4.1943 MHz or above then the counter will be more
accurate.
Hints and Tips
1. NiCd Operation
This frequency counter can operate for up to six hours from its fully charged NiCd
batteries. They are charged when the unit is plugged into the supplied AC/DC
adapter. Full recharge will occur over 12 to 16 hours. Before recharging the
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
fails.
2. Signal Input
When using the counter with an antenna for signal pick up, random frequencies
may appear on the display. This is quite normal and is caused by the high gain of
Page 7
the receiver circuits, which amplify noise in the absence of a strong readable
VHF Two Way Radio
signal. Never get the unit too close to a transmitter as internal damage will result.
3. Antenna Selection
The supplied 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
shorter antenna for UHF and a fully extended one for VHF / HF.
-6-
4. Reception Distance From Transmitter
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
the frequency in use.
Some typical distances are:
Cordless Phone 0.3 meters
Cellular Phone 3 - 20 m
CB radio 2 - 8 m
3 - 30 m
UHF Two Way Radio 3 - 30 m
Input Sensitivity ( Typical )
Never make any kind of connection between the counter and a transmitter.
Amplifier: 1 Meg Ohm 50 Ohm
Impedance: 1 Meg Ohm, 30 pF 50 Ohm VSWR less
than 2:1
Range: 10 Hz – 50 MHz 1 MHz - 3 GHz
Sensitivity: < 10 mV at 10 Hz – 10 MHz
< 0.8mV at 100 MHz
< 20 mV at 10 MHz – 50 MHz
< 6 mV at 300 MHz
< 7 mV at 1.0 GHz
< 100 mV at 2.4 GHz
Max. input: 100 Vrms 15 dBm
RF Signal Strength Bargraph
Frequency 1st Segment Full Scale
27 MHz 7mV 100 mV
150 MHz 5 mV 90 mV
800 MHz 10 mV 200 mV
Frequency Display Resolution
Range Gate Time (Seconds) LSD Sample Display
300 MHz 0.0625 10 Hz 300.00000 MHz
Page 8
0.25 1 Hz 300.000000
MHz
1.0 1 Hz 300.000000
MHz
4.0 0.1 Hz 300.0000000
MHz
3 GHz 0.0625 1000 Hz 3000.000 MHz
0.25 100 Hz 3000.0000 MHz
1.0 10 Hz 3000.00000
MHz
4.0 10 Hz 3000.00000
MHz
-7-
Model 105
Introduction
The model 105 is the latest advance in hand-held radio frequency finder /
counter. It excels at finding frequencies for secure monitoring applications.
It automatically and instantly tunes ICOM CI-V or AOR receivers to the
frequency it finds. It is compact, truly pocket-sized and is designed for
ease of use and reliable performance. It comes complete with internal NiCd
pack, AC wall charger, 7 section telescopic antenna and interface cable.
IMPORTANT: This unit only works with analog signals
Specifications
Frequency range: 1 MHz - 3 GHz
Weight: 250 g
Size: 100 mm high x 68 mm wide x 31 mm deep
Impedance: 50 Ohms (BNC Socket)
Case: Stamped aluminum with black anodized finish
Battery: Internal 4 x AA 600 mAH NiCd pack
Power: 9 VDC 300 mA
Timebase: Less than 1 PPM at room temperature
Features
l 10 digit Liquid Crystal Display
l Low power consumption (Average 6 hour battery life)
l LED back light
Page 9
l Supplied with NiCd pack, AC wall charger, telescopic antenna and interface
cable
l Measures frequency and period
l Automatically holds and tunes ICOM CI-V or AOR receivers
l Filter prevents display of random noise
l Hold switch to lock display
l Low battery indicator
l Beeper
l 4 selectable gate speeds
-8-
l Ultra sensitive synchronous detector 16 section bargraph to show RF signal
strength
l High speed 300 MHz direct counter with 0.1 Hz resolution
Controls
1. Power Switch. This slide switch turns the RF finder on which also
initiates a 2 second test of all the LCD segments.
2. Com Switch. This slide switch selects either the ICOM CI-V receivers or
the AOR receivers.
3. Range Switch. This should be switched to the 300 MHz position for
frequencies between 1 MHz and 300 MHz and switched to the 3 GHz
position for frequencies between 10 MHz and 3 GHz.
4. Lite Switch. This slide switch turns the LCD back light on and off.
5. Filter Switch. Slide the switch to turn the filter on and off.
6. Function Button. This selects the frequency or period. This button has
four settings. One each for displaying frequency or period as these are
received, and two settings for automatic hold and tune of the first
frequency or period found.
7. Hold Button. This holds the current display and stops the RF finder from
counting.
8. Gate Button. This selects the gate or measurement time. A longer gate
time allows counting for longer period and results in higher accuracy.
9. Calibration. The calibration adjustment opening is located on the front
panel of the RF finder. This allows access to the trimmer capacitor that
provides about a 10 PPM adjustment range of the time base oscillator.
This is not usually necessary but to do so read a signal of a known
frequency before adjusting the trimmer for correct frequency display. If
you calibrate at 4.1943 MHz or above then the RF finder will be more
accurate.
Page 10
Hints and Tips
VHF Two Way Radio
1. NiCd Operation
This RF finder can operate for up to six hours from its fully charged NiCd
batteries. They are charged when the unit is plugged into the supplied AC/DC
adapter. Full recharge will occur over 12 to 16 hours. Before recharging the
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
fails.
2. Signal Input
When using the RF finder with an antenna for signal pick up, random frequencies
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
signal. Never get the unit too close to a transmitter as internal damage will result.
3. Antenna Selection
The supplied 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
shorter antenna for UHF and a fully extended one for VHF / HF.
4. Reception Distance From Transmitter
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
the frequency in use.
Some typical distances are:
Cordless Phone 0.6 meters
Cellular Phone 6 - 20 m
CB radio 4 - 8 m
6 - 30 m
UHF Two Way Radio 6 - 30 m
Input Sensitivity ( Typical )
Never make any kind of connection between the RF finder and a
transmitter.
Amplifier: 50 Ohm
Impedance: 50 Ohm VSWR less than 2:1
Range: 1 MHz - 3 GHz
Sensitivity: less than 2 mV at 100 MHz - 1.2 GHz
Max. input: 15 dBm
-9-
Page 11
RF Signal Strength Bargraph
Frequency 1st Segment Full Scale
27 MHz 7 mV 100 mV
150 MHz 5 mV 90 mV
800 MHz 10 mV 200 mV
-10-
Frequency Display Resolution
Range Gate Time (Seconds) LSD Sample Display
300 MHz 0.0625 10 Hz 300.00000 MHz
0.25 1 Hz 300.000000
MHz
1.0 1 Hz 300.000000
MHz
4.0 0.1 Hz 300.0000000
MHz
3 GHz 0.0625 1000 Hz 3000.000 MHz
0.25 100 Hz 3000.0000 MHz
1.0 10 Hz 3000.00000
MHz
4.0 10 Hz 3000.00000
MHz
Model 106
Introduction
The model 106 hand-held radio frequency counter is compact, truly
pocket-sized, versatile test instrument designed for measuring any digital,
on/off keying or analog signal on frequencies between 30 MHz and 2.8
GHz. Supplied as a complete with internal NiCd pack, AC wall charger and
7 section telescopic antenna.
Page 12
Specifications
Never make any kind of connection between the RF
counter and a
transmitter.
Impedance: 50 Ohms (BNC Socket) VSWR less than 2:1
Frequency range: 30 MHz – 2.8 GHz
Sensitivity: less than 5 mV
Max. input: 15 dBm
Resolution: 10 KHz for digital Signals or On/Off Keying
1 KHz for Analog Signals
Timebase: Less than 1 PPM at room temperature
Weight: 210 g
Size: 80 mm high x 68 mm wide x 31 mm deep
Case: Stamped aluminum with black anodized finish
Battery: Internal 4 x AA 600 mAH NiCd pack
Power: 9 VDC 300 mA
Features
l 7 digit Liquid Crystal Display
l Frequency counter for digital, on/off keying and analog signals with a
minimum pulse width of 250 uS.
l Ultra sensitive synchronous detector - 16 section bargraph to show RF
signal strength (-35dBm to 0 dBm)
l Two range positions - the 1 GHz position for frequencies between 30 MHz
and 1 GHz and the 2.8 GHz position for frequencies between 500 MHz and
2.8 GHz.
l Squelch adjustment for input signals
l Hold switch to lock display
l Low battery indicator
l Low power consumption (Average 5 hour battery life)
l Supplied with NiCd pack, AC wall charger and telescopic antenna (143 MHz
to 460 MHz)
Controls
1. SQL Knob - This knob turns the RF counter on and tunes the squelch
up or down to set the signal strength for reception.
2. Range Switch - This should be switched to the 1 GHz position for
frequencies between 30 MHz and 0.8 GHz and switched to the 2.8 GHz
position for frequencies between 500 MHz and 2.8 GHz.
3. Hold Button - This holds the current display and stops the counter from
counting.
4. Calibration - The calibration adjustment opening is located on the front
panel of the counter. This allows access to the trimmer capacitor that
provides about a 10 PPM adjustment range of the time base oscillator.
-11-
Page 13
This is not usually necessary but to do so read a signal of a known
will result.
frequency before adjusting the trimmer for correct frequency display. If
you calibrate at 4.1943 MHz or above then the counter will be more
accurate.
Hints and Tips
1. NiCd Operation
This RF counter can operate for up to six hours from its fully charged NiCd
batteries. They are charged when the unit is plugged into the supplied AC/DC
adapter. Full recharge will occur over 12 to 16 hours. Before recharging the
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
fails.
2. Signal Input
When using the RF counter with an antenna for signal pick up, random
frequencies 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 signal. Never get the unit too close to a transmitter as internal damage
3. Antenna Selection
The supplied 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
shorter antenna for UHF and a fully extended one for VHF / HF.
4. Reception Distance From Transmitter
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
the frequency in use.
-12-
Page 14
SC-1 RF Signal Strength Bargraph
I/P LEVEL (mV)
I/P FREQUENCY (MHz)
30
100
200
300
400
500
600
700
800
900
1,000
1,100
1
10
100
1,000
1,200
Optional Accessories
Model BP 10 - Battery Pack
- 4 x AA 600mAH NiCd Battery Pack
Model AT 1 - Telescopic Antenna
- 144 to 430 MHz
- 24.4” (62cm) Length (extended)
- BNC Connector
Model AT 2 - Flexible Antenna
- 150/300/450/900MHz
- 7.9” (20cm) Long
- BNC Connector
Model AT 3 - Rubber Broadband Antenna
- 150/300/450/900/1200MHz
- 7” (18cm) Long
- BNC Connector
Model AT 4 - Rubber 2.4GHz Antenna
- 2.4GHz
- 4.7” (12cm) Long
- BNC Connector
1,300
1,400
1st Segment
Full Scale
1,500
1,600
1,700
1,800
1,900
2,000
2,100
2,200
2,300
2,400
2,500
2,600
2,700
2,800
Page 15
without limitation damages resulting from loss of use. Some states do not allow
Limited One-Year Warranty
B&K Precision Corp. warrants to the original purchaser that its product and the
component parts thereof, will be free from defects in workmanship and materials
for a period of one year from the data of purchase.
B&K Precision Corp. will, without charge, repair or replace, at its’ option,
defective product or component parts. Returned product must be accompanied
by proof of the purchase date in the form a sales receipt.
To obtain warranty coverage in the U.S.A., this product must be registered by
completing and mailing the enclosed warranty card to B&K Precision Corp.,
22820 Savi Ranch Parkway, Yorba Linda, CA 92887 within fifteen (15) days from
proof of purchase.
Exclusions: This warranty does not apply in the event of misuse or abuse
of the product or as a result of unauthorized alternations or repairs. It is
void if the serial number is alternated, defaced or removed.
B&K Precision Corp. shall not be liable for any consequential damages, including
limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you.
This warranty gives you specific rights and you may have other rights, which vary
from state-to-state.
Model Number: ______________ Date Purchased: __________
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
www.bkprecision.com
-15-
Page 16
with the device.
-16-
Service Information
Warranty Service: Please return the product in the original packaging with proof
of purchase to the below address. Clearly state in writing the performance
problem and return any leads, connectors and accessories that you are using
Non-Warranty Service: Return the product in the original packaging to the
below address. Clearly state in writing the performance problem and return any
leads, connectors and accessories that you are using with the device. Customers
not on open account must include payment in the form of a money order or credit
card. For the most current repair charges contact the factory before shipping the
product.
Return all merchandise to B&K Precision Corp. with pre-paid shipping. The flatrate repair charge includes return shipping to locations in North America. For
overnight shipments and non-North America shipping fees contact B&K Precision
Corp..
B&K Precision Corp.
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
Email: service@bkprecision.com
Include with the instrument your complete return shipping address, contact
name, phone number and description of problem.
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