Kenwood TKR-850 Service Manual page 41

TKR-850
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
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
1 8
MIC connector (Front panel view)
Test Channel (Default)
No. K
RX TX RX
1 450.10 450.00 440.10 440.00 480.10 480.00 400.10 400.00
2 465.10 465.00 455.10 455.00 496.10 496.00 415.10 415.00
3 479.90 480.00 469.90 470.00 511.90 512.00 429.90 430.00
4 455.10 455.00 445.10 445.00 485.10 485.00 405.10 405.00
5 460.10 460.00 450.10 450.00 490.10 490.00 410.10 410.00
6 470.10 470.00 460.10 460.00 500.10 500.00 420.10 420.00
7 475.10 475.00 465.10 465.00 505.10 505.00 425.10 425.00
8 462.60 462.50 452.60 452.50 493.60 493.50 412.60 412.50
9 467.60 467.50 457.60 457.50 498.60 498.50 417.60 417.50
10 440.10 440.00 459.90 460.00 499.90 500.00 419.90 420.00
11 459.90 460.00 479.90 480.00 519.90 520.00 439.90 440.00
42
ADJUSTMENT
Frequency Range
Modulation
Output
Input Impedance
Operation Frequency
Measurement Capability
Frequency Range
Measuring Range
Accuracy
Frequency Range
Frequency Stability
Frequency Range
Voltage Range
Frequency Range
Output
Capability
Input Level
Measuring Range
Input Impedance
E K2 K3
TX RX TX RX
Major Specifications
400 to 512MHz
Frequency modulation and external modulation
0.1µV to greater than 1mV
50Ω
400 to 512MHz or more
Vicinity of 50W
400 to 512MHz
1 to 20V DC
High input impedance for minimum circuit loading
DC through 30MHz
10Hz to 600MHz
0.2ppm or less
13A or more
50Hz to 10kHz
3mV to 3V
50Hz to 5kHz
0 to 1V
3% or less at 1kHz
50mV to 10Vrms
10 to 1.5V DC or less
50kΩ/V or greater
Approx. 4Ω, 5W
• The following test cables are recommended.
8pin
To AG
AF VTVM
8pin
TX
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
Plug cord
Part No. E30-3360-08
HOOK
(BRN)
MIC
(WHT)
MICG
PTT
(YEL)
PTT SW
PTT
Cut
(RED)