Adjustment Procedures; Preparation - Icom PMR446 Service Manual

SECTION 5 ADJUSTMENT PROCEDURES

5-1 PREPARATION

REQUIRED TEST EQUIPMENT
EQUIPMENT
Output voltage
DC power supply
Current capacity
Frequency range
Frequency counter Frequency accuracy : ±1 ppm or better
Sensitivity
Frequency range
FM deviation meter
Measuring range
DC voltmeter Input impedance
Measuring range
RF power meter Frequency range
(terminated type) Impedance
SWR
ENTERING THE ADJUSTMENT MODE
q Turn the transceiver power OFF.
w While connecting the "TEST" and GND on the MAIN unit, then turn power ON.
(See location at page 5-3)
CONNECTIONS
FM deviation
meter
DC power supply
4.5 V/1.0 A
GRADE AND RANGE
: 4.5 V DC
: 1 A or more
: 0.1–600 MHz
: 100 mV or better
: 30–600 MHz
: 0 to ±10 kHz
: 50 kΩ/V DC or better
: 100 mW–1 W
: 300–600 MHz
: 50 Ω
: Less than 1.2 : 1
CAUTION:
DO NOT transmit while SSG is
connected to the antenna connector.
Attenuator
30 dB or 40 dB
–
+
EQUIPMENT
Frequency range
Audio generator
Measuring range
Frequency range
Standard signal
Output level
generator (SSG)
Frequency range
Oscilloscope
Measuring range
AC millivoltmeter Measuring range
Input impedance
External speaker
Capacity
Power attenuation
Attenuator
Capacity
to the RF test port J1
5 - 2
GRADE AND RANGE
: 300–3000 Hz
: 1–500 mV
: 0.1–600 MHz
: 0.1 µV–32 mV
(–127 to –17 dBm)
: DC–20 MHz
: 0.01–10 V
: 10 mV–10 V
: 8 Ω
: 300 mW or more
: 30 or 40 dB
: 1 W or more
Standard signal
generator
–17 to –127 dBm
(32 mV to 0.1 µV)
RF power meter
50 Ω/100 mW–1 W
Frequency
counter