32

TK-480/481
ADJUSTMENT
Test Equipment Required for Alignment
Test Equipment Major Specifications
1. Standard Signal Generator Frequency Range 800 to 950MHz
(SSG) Modulation Frequency modulation and external modulation
Output 0.1µV to greater than 1mV
2. Power Meter Input Impedance 50Ω
Operation Frequency 800 to 950MHz or more
Measurement Capability Vicinity of 10W
3. Deviation Meter Frequency Range 800 to 950MHz
4. Digital Volt Meter Measuring Range 10mV to 10VDC
(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
(AFVTVM) 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. Voltmeter Measuring Range 10mV to 10VDC or less
Input Impedance 50kΩ/V or greater
12. 16Ω Dummy Load Approx. 16Ω, 3W
13. Regulated Power Supply 5V to 10V, approx. 5A
Useful if ammeter requipped

■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.

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