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TK-260G/270G
33
ADJUSTMENT
Test Equipment Required for Alignment
Test Equipment Major Specifications
1. Standard Signal Generator Frequency Range 150 to 175MHz
(SSG) Modulation Frequency modulation and external modulation.
Output -127dBm/0.1µV to greater than -47dBm/1mV
2. Power Meter Input Impedance 50Ω.
Operation Frequency 150 to 175MHz or more.
Measurement Range Vicinity of 10W
3. Deviation Meter Frequency Range 150 to 175MHz.
4. Digital Volt Meter Measuring Range 10mV to 10V DC
(DVM) Input Impedance High input impedance for minimum circuit loading.
5. Oscilloscope DC through 30MHz.
6. High Sensitivity Frequency Range 10Hz to 1000MHz.
Frequency Counter Frequency Stability 0.2ppm or less.
7. Ammeter 5A.
8. AF Volt Meter Frequency Range 50Hz to 10kHz.
(AF VTVM) Voltage Range 1mV to 10V.
9. Audio Generator (AG) Frequency Range 50Hz to 5kHz or more.
Output 0 to 1V.
10. Distortion Meter Capability 3% or less at 1kHz.
Input Level 50mV to 10Vrms.
11. Spectrum Analyzer Measuring Range DC to 1GHz or more
12. Tracking Generator Center frequency 50kHz to 600MHz
Output Voltage 100mV or more
13. 8Ω Dummy Load Approx. 8Ω, 3W.
14. Regulated Power Supply 5V to 10V, approx. 3A
Useful if ammeter equipped.
■ The following parts are required for adjustment
1. Antenna connector adapter
The antenna connector of this radio uses an SMA terminal.
Use an antenna connector adapter [SMA(f) – BNC(f) or
SMA(f) – N(f)] for adjustment. (The adapter is not provided as
an option, so buy a commercially-available one.)
Note
When the antenna connector adapter touches the knob,
draw out the knob to mount the connector.
Repair Jig (Chassis)
1. Jig (chassis : Part No. A10-4009-03) for adjustment.
2. Use the jig as follows.
① Place the TX-RX unit on the jig and fix it with thirteen
screws ∂ .
➁ Solder the antenna terminal of the TX-RX unit.
3. Supply power from an external power supply.
Relay terminal : + (7.5)
Jig (Chassis) : -
Relay terminal
(+)
Power module
UNIT
JIG
Coaxial antenna connector
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