Kenwood TH-K20A, Service Manual

Page: 18 / 40

TH-K20A/K20E
18
ADJUSTMENT
Note:
• When performing the TH-K20 adjustment, a personal
computer, programming interface cable (KPG-22A/22U),
tuning cable (E30-3216-05) and tuning software (MCP-5T)
are required.
• When you do not want to lose data such as memory
channels or menu items, save the data using the MCP-
5A (Memory control program), then write the data to the
transceiver after performing the adjustment.
To download the MCP-5A software, go to:
http://www.kenwood.com/i/products/info/amateur/software_download.html
(This URL may change without notice.)
1. PC Tuning
The tuning software can be used with a PC. Figure 1
shows the setup of a PC for programming.
Fig. 1
Note:
• You must install the KPG-22U driver in the computer to
use the USB programming interface cable (KPG-22U).
The KPG-22U driver runs under Windows XP, Vista or 7.
2. Tuning Software MCP-5T Description
The MCP-5T is the tuning software for the TH-K20. This
software runs under Windows XP, Vista or 7 on a PC. The
software allows a user to tuning the transceiver via Program-
ming interface cable (KPG-22A/22U) and tuning cable (E30-
3216-05).
Refer to the MCP-5T help fi le for the details on how to
use the MCP-5T.
3. Firmware version information
Press and hold the [ENT] key while turning the transceiv-
er power ON , the fi rmware version information appears on
the LCD.
Required Test Equipment
1. Stabilized Power Supply
1) The supply voltage can be changed between 3V and 16V
and the current is 3A or more.
2) The standard voltage is 7.5V. (Power supply voltage
range: 6V-9V)
2. DC Ammeter (DC. A)
1) Class 1 ammeter (17 ranges and other features)
2) The full scale can be switched between 300mA and 3A.
3) A cable with low internal loss must be used.
3. Frequency Counter (f. counter)
1) Frequencies of up to 1GHz or so can be measured.
2) The sensitivity can be changed to 250MHz or below and
measurements are highly stable and accurate (about
0.2ppm).
4. Power Meter (terminal type)
1) Measurable frequency: Up to 500MHz
2) Impedance: 50

, unbalanced
3) Measuring range: Full scale of 10W
4) The specifi ed special connection cable must be used.
5. RF VM (RF V.M)
1) Measurable frequency: Up to 500MHz or so
6. Linear Detector
1) Measurable frequency: Up to 500MHz
2) Characteristic is fl at and CN is 60dB or more.
7. Digital Voltmeter
1) Voltage range: FS = 18V or so
2) Input resistance: 1M

or more
8. Oscilloscope
1) Measuring range: DC to 30MHz
2) Provides highly accurate measurements for 5 to 25MHz
9. AF Voltmeter (AF V.M)
1) Measurable frequency: 50Hz to 1MHz
2) Maximum sensitivity: 1mV or more
10. Spectrum Analyzer
1) Measuring range: 10kHz to 1GHz or more
11. Standard Signal Generator (SSG)
1) Maximum frequency: 500MHz or more
2) Output: –133dBm (0.05µV) to –13dBm (50mV)
3) Output impedance: 50

12. Tracking Generator
1) Center frequency: 50kHz to 200MHz
2) Frequency deviation: ±35MHz
3) Output voltage: 100mV or more
13. Dummy Load
1) 8

, 3W or more
PC
KPG-22A or KPG-22U
Illustration is KPG-22A.
MCP-5T
Tuning cable
(E30-3216-05)
D-SUB
Transceiver Transceiver
KPG-22A
PC
Gray
Gray/Black
1.5D-XV Lead wire
1.5D-XV Shield wire +
–
+
–
SP
MIC
(9-pin)
USB
KPG-22U
PC