Adjustment - Kenwood TH-28A Service Manual

TH-28A/E
ADJUSTMENT
Required Test Equipment
1.
A,
Stabilized Power Supply
1) The supply voltage can be changed between 5V
and 18V, and the current is 5A or more.
2) The standard voltage is 13.8V.
DC Ammeter
1) Class 1 ammeter (17 ranges and other fea-
tures).
2) The full scale can be set to either 300mA or
3A.
3) Acable of less internal loss must be used.
Frequency Counter (f. counter)
1) Frequencies of up to 1GHz or so can be meas-
ured.
2) The sensitivity canbe changed to 250MHz or
below, and measurements are highly stable and
accurate (0.2ppm or so).
Power Meter
1) Measurable frequency : Up to 500MHz.
7. Digetal Voltmeter
1) Voltage range : FS = 18V or so.
2) Input resistance : 1MQ 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 : 7mV or more.
10. Spectrum Analyzer
1) Measuring range : DC to 1GHz or more.
11. Standard Signal Generator (SSG)
1) Maximum frequency : 500MHz or more.
2) Output : -20dB/0.1pV to 120dB/1V.
3) Output impedance : 50.
12. Tracking Generator
1) Center frequency : 50kHz to 500MHz.
2) Impedance = 50Q, unbalanced.
3) Measuring range : Full scale of 1OW or so.
4) Astandard cable (5D2W im) must be used.
. RF VTVM (RF V.M)
1) Measurable frequency : Up to 500MHz or so.
. Linear Detector
1) Measurable frequency > Up to BOOMHz.
2) Characteristics are flat, and CN is GOdB or more.
2) Frequency deviation -LS5MHz. ——
3) Output voltage : 100mV or more.
13. Dummy Load
1) 80, SW or more.
14. Distortion Meter
1) Measurable frequency : 30Hz to 100kHz.
2) Input level : |OmV to 10Vrms.
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