Kenwood TK-890/(B) Service Manual page 69

TK-890/ ( B
Test Equipment Required for Alignment
No. 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
13 Regulated Power Supply
Caution
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.
MIC connector
(Front view)
1
12 2
11 3
4
10
9 5
8 6
7
1 : SB
2 : HOOK
3 : MICG
4 : MIC
5 : Earth
6 : TRD
7 : NC
8 : DM
9 : BLC
10 : PTT
11 : NC
12 : NC
68
) /H ( B )
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
Test cable for microphone input
2 : HOOK (GRY)
To AG 4 : MIC (WHT)
AF VTVM 3 : MICG (Shield)
Major Specifications
400 to 512MHz.
Frequency modulation and external modulation.
0.1µV to greater than 1mV.
50Ω.
400 to 512MHz or more.
Vicinity of 200W.
400 to 512MHz.
1 to 20V DC.
High input impedance for minimum circuit loading.
DC through 30MHz.
10Hz to 600MHz.
0.2ppm or less.
30A.
50Hz to 10kHz.
3mV to 3V.
50Hz to 5kHz or more.
0 to 1V.
3% or less at 1kHz.
50mV to 10Vrms.
10 to 1.5V DC or less.
50kΩ/V or greater.
Approx. 4Ω 30W.
(Adjustable from 9 to 17V, 30A).
Useful if ammeter equipped.
E30-3313-08
10 : PTT (BLU)
PTT SW
Cut
5 : PTT (BLK)
Test cable for speaker output