Adjustment Procedures; Preparation - Icom IC-T70A Service Manual

SECTION 5. .

5-1 PREPARATION

¤ REQUIRED EQUIPMENTS
EQUIPMENT
DC cable OPC–254L (Optional product)
Measuring range
RF power meter
Frequency range
(50 terminated)
SWR
Modulation Frequency range
analyzer Measuring range
AC millivoltmeter Measuring range
Ammeter Measuring range
Audio generator Frequency range
(AG) Output level
¤ JIG CABLES
• JIG CABLE #1
(SP)
3-conductor 3.5 (d) mm plug
• JIG CABLE #2
3-conductor 2.5 (d) mm
ADJUSTMENT PROCEDURE
GRADE AND RANGE
: 0.1–10 W
: 100–600 MHz
: Less than 1.2 : 1
: 30–600 MHz
: 0 to ±10 kHz
: 10 mV to 10 V
: 10 mA to 3 A
: 300–3000 Hz
: 1–500 mV
(GND)
82 kΩ
(REMOTE)
(300–3000 Hz/1–500 mV)
(GND)
plug
(MIC)
4.7 μF
EQUIPMENT
JIG cable
Frequency counter
Standard signal
generator (SSG)
Attenuator
Voltage meter
AUDIO GENERATOR
+ −
+
5 - 1
GRADE AND RANGE
See the page 5-1.
Frequency range : 0.1–600 MHz
Frequency accuracy : ±1 ppm or better
Input level : Less than 1 mW
Frequency range : 0.1–600 MHz
Output level : –20 dBμ to 90 dBμ
(–127 to –17 dBm)
Power attenuation : 30 dB
Capacity : More than 6.0 W
Measuring range : 5–20 V
MILLIVOLTMETER
(10 mV to 10 V)
SETTING;
Frequency : 1 kHz
Level : 150 mVrms
Waveform : Sine wave
AC
+ −