Adjustment Procedures; Preparation - Icom IC-91A Service Manual

SECTION 6

6-1 PREPARATION

When adjusting IC-91A/AD, these test equipments, OPC-254L and the JIG cables (see the illust below) are required.
¤ REQUIRED TEST EQUIPMENTS
EQUIPMENT
Output voltage
DC power supply
Current capacity
Measuring range
RF power meter Frequency range
(terminated type) Impedance
SWR
Frequency range
Frequency accuracy : ±1 ppm or better
Frequency counter
Sensitivity
Frequency range
FM deviation meter
Measuring range
Frequency range
Audio generator Output level
¤ CONNECTION
CAUTION!
DO NOT transmit while
the SSG is connected to
the antenna connector.
RF power meter
0.1−7 W/50 Ω
DC power supply for
"TX power IDLING/FINAL" adjustment
To the [DC IN] jack
OPC-254L
B a l c : k
W h t i : e
DC power supply
13.5 V/2.5 A
DC power supply for other adjustments
(Except "TX power IDLING/FINAL")
DC power supply*
5.0–7.5 V/2.5 A
*Be sure the polarity.

ADJUSTMENT PROCEDURES

GRADE AND RANGE
: 5.0–13.5 V DC
: More than 2.5 A
: 0.1–7 W
: 100–500 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–500 MHz
: 100 mV or better
: 30–500 MHz
: 0 to ±10 kHz
: 300–3000 Hz
: 1–500 mV
(–47 to 7 dBm)
Standard signal generator
0.1 µV to 32 mV
(–127 dBm to –17 dBm)
Attenuator
20 dB or 30 dB
to the [MIC] jack
IC-91A/AD
EQUIPMENT
Frequency range : 0.1–1800 MHz
Standard signal
Output level
generator (SSG)
Frequency range : DC–20 MHz
Oscilloscope
Measuring range : 0.01–20 V
AC millivoltmeter Measuring range : 10 mV to 10 V
Input impedance
External speaker
Capacity
Power attenuation : 20 or 30 dB
Attenuator
Capacity
FM
deviation meter
Frequency
counter
• JIG cable
33 kΩ
PTT
• JIG cable
1 kΩ
6 - 1
GRADE AND RANGE
: 0.1 µV to 32 mV
(–127 to –17 dBm)
: 8 Ω
: More than 50 mW
: More than 7 W
Osciiloscope
AC
millivoltmeter
Audio generator
300 Hz to 3 kHz