Standard CV110 User manual

OPERATING INSTRUCTIONS
CV110
2mFM VFO

Thank you for your selection of our new product CV 110.
The STANDARD CV 110 is VFO exclusively used in combination with 144 MHz
Amateur Band FM Transceiver.
CV 110 is designed with utmost care through our advanced techniques and
ample experience in the fi eld of FM transceivers so as to assure your everlasting
satisfaction.
CONTENTS
1. Introduction 2
2. Features 2
3. Operating Parts 4
4. How to Use 5
5. Timing Meter 6
6. CAL Knob 6
7. RTT Knob 6
8. Precaution for Mobile Station Operation 7
9. Specifications 8
10. Block Diagram 9
11. Circuit Diagram 10
— 1 —

1. Introduction
The Model CV-110 is VFO intended to be used with 144 MHz amateur band FM
transceiver. It permits communications on unlimited numbers of Channels by simply
disabling the crystal oscillator of FM transceiver, performing more advanced ope«
rations.
The Model CV-110 is a complete transceive VFO with one crystal oscillator work-
ing both for transmission and reception, thus allowing one touch Operation of QSY.
2. Features
1) Compact Styling
CV-110 is the same as C 828M* in size. The overall dimension is less than half
of the size of our conventional models. When used as a mobile Station, it can
be mounted at vehicle driver's seat area.
2) Push-in/Pull-out Mounting Brächet
CV-110 can be attached to and detached from the mounting brächet by a
Single motion basis. For attaching, just snap CV-110 into the brächet. The
reverse consequence can be obtained by simply snapping it off toward you.
3) Vibration-resistant Design
Due to the development bf fully isolated oscillator block covered with a plate
of 1.2 mm thich, CV-110 is highly resistant against vibrations. The QSO is
comparable to that of crystal oscillator even when the imit is used as a mobile
Station.
4) Excellent Frequency Stability
The employment of MOS FET in the clap circuit and the use of slit steatite
bobin, loch type air trimmer, etc., assure excellent frequency stability. The
clap circuit has outstanding Performance as proved in the circuit of SSB equip-
ment.
5) One Touch Connection
CV-110 can be ready for Operation simply by plugging the connecting cable
into the external oscillator terminal of C 828M
6) Tuning Meter
When CV-110 is connected to the transceiver, the center meter functions even
when the transceiver is being operated with its own built-in crystal oscillator.
The meter can be used for VFO tuning, cheching of frequency deviation of
crystal oscillator, etc..
7) KIT
The RIT feature is provided for round table use. It adjusts the transceiver to
the deviated frequencies occurring in one or two receiving stations.
— 2 —

8) Remote Control VFO/Crystal Osci Ilator Selection
CV-110 can be turned on and off by the memory switch mounted on the micro-
phone. The on/off control is made quickly while the microphone is being in
use in your band.
9) CVrllO incorporates newly adopted glass epoxi printed circuit board for better
operational Performance.
10) Green Lamp Illumination
The meter and dial are illuminated green. This protects the Operator from
dazzling light and assures safe driving of car at night.
11) Removable Stand
The removable stand is used when the unit is operated as a fixed Station.
3 —

3. Operating Parts
(£) Tuning Meter
CD Tuning Knob
(D Dial
0 CAL Knob
(D KIT Knob
Stand
CAL
«IT

4. How to Use
1) Connection
Plug the connecting cable of CV-110 into the external oscillator terminal on
the side of C 828M (refer to the instructions forC828M). CV-110 will now be
ready for Operation. This connection completes the connections of both the
power supply and the oscillator output circuit.
Note: CV-110 is designed for exclusive use with C 828M (1 crystal transmitting/
receiving system). It cannot be used with the transceiver of 2 crystal system.
2) Operation
When the connection has been fi nished, check to make sure that the white
line on the RIT knob © is in the center position. Turn on the power switch
of CV-110. The tuning meter and the dial will be illuminated indicating that
the power is on.
To select CV-110 or the crystal oscillator built in the transceiver, use the
memory switch mounted on the microphone. Set the memory switch to ON
and the orange light of the memory lamp will come on indicating that CV-110
is operating.
Tune in your desired receiving Station by turning the tuning knob (2). When
the meter of C 828M shows maximum deflection and the tuning meter ® of CV-
110 indicates the center position, then the tuning is perfect. This also tunes
the transmitting frequency in the receiving Station. Your CV-110 is now ready
for QSO Operation.
Note: The memory Channel oscillator circuit will not operate while CV-110 is being
connected. Be sure to shift the crystal oscillating element by referring to the
instructions for €828M
— 5 —

5. Tuning: Meter
The tuning meter is a high sensitivity ampere meter
rated at ±75/uA. It keeps operating as long as CV-110
is connected to C 828M. As explained in the preceeding
Paragraph 4 " How to Use accurate tuning point is
obtained when the meter pointer indicates the center Posi
tion. For practical use, however, a minor deviation within the ränge of the dotted
lines (about ±2.5 KHz) does not affect the Operation of the unit.
Note; When no signal is received, the tuning meter may be off the center position.
This is in no way an indication that the unit is in trouble.
6. CAL Enob
Tuming the CAL Knob 0 will vary both the transmitting and receiving fre-
quencies simultaneously within the ränge of ± 20KHz, regardless of the position
of the dial scale. To calibrate the dial graduation, use this knob while utilizing
the crystal oscillator built in C828M.
"Calibrating Method of Dial Graduation Setting to 145MHz"
1. Set the dial of CV-110 to the " 145 " position.
2. Set the Channel selector of C 828M to the 145 MHz Channel.
3. Set the memory switch on the microphone to OFF and confirm that the signal
from the transmitting Station can bs caught by the crystal oscillator inC828M
and that the tuning meter of CV-110 is indicating the center position.
4. Set the memory switch on the microphone to ON so that CV-110 is operated.
5. Turn the CAL knob slowly to tune accurately to the opposite transmit Station.
Now, the calibration of dial graduation will have been completed.
Note: In calibrating the dial graduation, while you receive signal from a Station when
the frequency of CV-110 is exactly the same as the frequency of the crystal
oscillator in C828M and ON/OFF Operation of memory switch is repeated during
the reception, unusual noises may sometimes be heard. This is not an indica
tion that the unit is in trouble.
7. KIT Knob
Turning the RIT knob will vary only the receiving frequency within the ränge
of ± 5 KHz independently of the position of the dial scale. This knob is used to
receive one or two stations with deviated frequencies while maintaing the transmit
ting frequency accurately. For complete transceive Operation (regulär communica-
tion using the same frequency for both transmission and reception), be sure to set
the white line on the knob to the center position.
— 6 —

8. Precaution for Mobile Station Operation
For the purpose of safe driving, please avoid using CV-110 for QSY while the car
is running. To ensure pleasant driving, the use of the crystal oscillator inC828M
is recommended.
— 7 —

9. Specifications
1. Use:
2. Frequency Range:
3. Current Drain:
4. Output Voltage:
5. KIT Adjustable Range:
6. CAL Adjustable Range
7. Semiconductors:
8. Dimentions:
9. Weight:
VFO for 2 m band FM amateur transceiver
C828M
144.(W146.0MHz
(Output frequency: (30.50~31.00)MHz)
Less than 250 mA
More than 10 mV
±5KHz
±20KHz,
2FETs
4 transistors
4 diodes
84 x 58 x 235 (mm)
1.0kg
— 8 —

10. Block Diagram
BUF
TRIP
OSC
BUF -
REGULATOR
— 9 —