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5 - 1
SECTION 5
ADJUSTMENT PROCEDURES
5-1 PREPARATION
■
REQUIRED TEST EQUIPMENT
Power supply connection
VR board
connect (soldering)
,
line here
■
CONNECTIONS
RF power meter
FM deviation
meter
Attenuator
40 dB or 50 dB
connect (soldering) here
,
.
see detailed illustration below
DC power
supply
68 k
Ω
JIG connector
to the [SP] jack
CAUTION:
DO NOT
transmit while
an SSG is connected to
the antenna connector.
Standard signal
generator
Frequency
counter
EQUIPMENT
DC power supply
RF power meter
(terminated type)
Frequency counter
FM deviation meter
Digital multimeter
GRADE AND RANGE
Output voltage
: 9.6 V DC
Current capacity
: 5 A or more
Measuring range
: 1–10 W
Frequency range
: 120–300 MHz
Impedance
: 50
Ω
SWR
: Less than 1.2 : 1
Frequency range
: 0.1–300 MHz
Frequency accuracy : ±1 ppm or better
Sensitivity
: 100 mV or better
Frequency range
: DC–300 MHz
Measuring range
: 0 to 5 kHz
Input impedance
: 10 M
Ω
/V DC or better
EQUIPMENT
Audio generator
Attenuator
Standard signal
generator (SSG)
DC voltmeter
Oscilloscope
AC millivoltmeter
GRADE AND RANGE
Frequency range
: 300–3000 Hz
Measuring range
: 1–500 mV
Power attenuation
: 40 or 50 dB
Capacity
: 10 W or more
Frequency range
: 0.1–300 MHz
Output level
: 0.1 µV–32 mV
(–127 to –17 dBm)
Input impedance
: 50 k
Ω
/V DC or better
Frequency range
: DC–20 MHz
Measuring range
: 0.01–20 V
Measuring range
: 10 mV–10 V