Adjustment - Kenwood FM Transceiver TK-481 Service Manual

TK-480/481
Test Equipment Required for Alignment
Test Equipment
1. Standard Signal Generator
(SSG)
2. Power Meter
3. Deviation Meter
4. Digital Volt Meter
(DVM)
5. Oscilloscope
6. High Sensitivity
Frequency Counter
7. Ammeter
8. AF Volt Meter
(AF VTVM)
9. Audio Generator (AG)
10. Distortion Meter
11. Voltmeter
12. 16 Dummy Load
13. Regulated Power Supply
The following parts are required for adjustment
1. Antenna connector adapter
The antenna connector of this radio uses an SMA termi-
nal.
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.
2. Universal connector
Use the interface cable (KPG-36) for PC tuning or the lead
wire with plug (E30-3287-18) and screw (N08-0535-08) for
panel tuning. Connct the plug to the universal connector of
the radio and tighten the screw.
The lead wire with plug (E30-3287-18) and screw (N08-
0535-08) terminals are as follows. Numbers are universal
connector terminal numbers.
32

ADJUSTMENT

Frequency Range 800 to 950MHz
Modulation Frequency modulation and external modulation
Output 0.1 V to greater than 1mV
Input Impedance 50
Operation Frequency 800 to 950MHz or more
Measurement Capability Vicinity of 10W
Frequency Range 800 to 950MHz
Measuring Range 10mV to 10V DC
Input Impedance High input impedance for minimum circuit loading
DC through 30MHz
Frequency Range 10Hz to 1000MHz
Frequency Stability 0.2ppm or less
5A
Frequency Range 50Hz to 10kHz
Voltage Range 1mV to 10V
Frequency Range 50Hz to 5kHz or more
Output 0 to 1V
Capability 3% or less at 1kHz
Input Level 50mV to 10Vrms
Measuring Range 10mV to 10V DC or less
Input Impedance 50k /V or greater
Approx. 16 , 3W
5V to 10V, approx. 5A
Useful if ammeter requipped
Major Specifications
Caution
1. When connecting the plug to the universal connector of
the radio, a short circuit may occur. To prevent this, be
sure to turn the radio POWER switch off.
2. Since the RX AF output is a BTL output, there is a DC
component. Isolate this with a capacitor or transformer
as shown in the figure.
3. Do not connct an instrument between red or black and
GND.
• Universal connector
1: SSW
3: SP–
5: EMC
7: PTT
9: NC
11: 5M
13: RXD
2: SP+
4: MSW
6: ME
8: PF
10: E
12: TXD
14: NC