Preparation - Icom IC-E2820 Service Manual

SECTION 5

5-1 PREPARATION

¤ REQUIRED TEST EQUIPMENTS
When adjusting IC-E2820, following test equipments and JIG cable (modified 8-pin modular jack; see the illust below) are required.
EQUIPMENT
Output voltage
DC power supply
Current capacity
Measuring range
Frequency range
RF power meter
Impedance
(terminated type)
SWR
Frequency range
Frequency accuracy : ±1 ppm or better
Frequency counter
Sensitivity
Frequency range
Modulation
Measuring range
Analyzer
¤ JIG CABLE
Controller
Main unit
JIG cable
To the MICROPHONE CONNECTOR
¤ ENTERING ADJUSTMENT MODE
q Connect the JIG cable to the MICROPHONE CONNECTOR (see the illust above).
w Push and hold the both of [MAIN•BAND] keys, then turn power ON.
¤ KEY ASSIGNMENTS IN THE ADJUSTMENT MODE
Entering adjustment mode, the function display shows adjustment item and conditions as below.
[PWR]
NOTE: This display is example only.
[MAIN•BAND] (Left band)
ADJUSTMENT PROCEDURE
GRADE AND RANGE
: 13.8 V DC
: More than 20 A
: 1–100 W
: 100–600 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–600 MHz
: 100 mV or better
: 30–600 MHz
: DC to ±10 kHz
8-pin modular jack
iuytrew
q
8V
w
MICU/D
e
EXTMIC
r
PTT
t
MICE
y
MIC
u
GND
i
MICIN
DUAL BAND TRANSCEIVER
V/MHz M/CALL DUP TONE
SCAN MW MONI DTMF
EQUIPMENT
Audio generator
Standard signal
generator (SSG)
AC millivoltmeter
Terminator
Attenuator
AUDIO GENERATOR
(300–3000 Hz/1–500 mV)
+ −
q
y (MIC)
t (MICE)
22 kΩ
w (MICU/D)
u (GND)
33 kΩ
r (PTT)
u (GND)
REF
LOW M/CALL V/MHz
PRIO MW SCAN
[V/MHz•SCAN]
Selects the next adjustment item.
[M/Call•MW]
Selects the previous adjustment item.
5 - 1
GRADE AND RANGE
Frequency range : 300–3000 Hz
Output level : 1–500 mV
Frequency range : 0.1–1 GHz
: 0.1 µV to 32 mV
Output level
(–127 to –17 dBm)
Measuring range : 10 mV to 10 V
: 50 Ω
Impedance
Capacity : More than 100 W
Power attenuation : 40 dB
Capacity : More than 100 W
AC MILLIVOLT METER
(10 mV to 10 V)
<SETTING>
Frequency : 1 kHz
1
Level : 20 mV rms*
2
80 mV rms*
[PTT]
[DIAL] (Right band)
Adjusts the value
for the item manually.
[MAIN•BAND] (Right band)
• Stores the set value
• Adjusts the value
for the item automatically.
+ −