Adjustment - Kenwood TKR-851 Service Manual

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. 4Ω Dummy Load
The following parts are required for adjustment
• Test cable for local microphone
8 1
1 : NC
2 : +B
3 : GND
4 : PTT/TXD1 (PC serial data from radio)
5 : MIC GND
6 : MIC
7 : HOOK/RXD1 (PC serial data to radio)
8 : NC
MIC connector (Front panel view)

ADJUSTMENT

Frequency Range 400 to 512MHz
Modulation Frequency modulation and external modulation
Output 0.1µV to greater than 1mV
Input Impedance 50Ω
Operation Frequency 400 to 512MHz or more
Measurement Capability Vicinity of 30W
Frequency Range 400 to 512MHz
Measuring Range 1 to 20V DC
Accuracy High input impedance for minimum circuit loading
DC through 30MHz
Frequency Range 10Hz to 600MHz
Frequency Stability 0.2ppm or less
10A or more
Frequency Range 50Hz to 10kHz
Voltage Range 3mV to 3V
Frequency Range 50Hz to 5kHz
Output 0 to 1V
Capability 3% or less at 1kHz
Input Level 50mV to 10Vrms
Measuring Range 10 to 1.5V DC or less
Input Impedance 50kΩ/V or greater
Approx. 4Ω, 5W
Major Specifications
• The following test cables are recommended.
8 pin
HOOK
(GRY)
To
MIC (WHT)
AG
MICG (SHIELD)
AF VTVM
Cut
8 pin
Test cable for microphone input
To connect the TX-RX unit A/2 (CN14) to the TX-RX unit B/
2 (CN602) while in servicing, you can use the 36-pin flat
cable, E37-0979-05, which is available from the KENWOOD
parts center.
Flat cable (36-pin) about 256mm
TKR-851
Plug cord
Part No. E30-3360-18
PTT
(BLU)
PTT SW
GND
(BLK)
37