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5 - 5
5-3 TRANSMITTER ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
UNIT
LOCATION
UNIT
ADJUST
YGR
CURRENT
[ FPGA D.C.
voltage ad-
justment
/DV I ]
1 • Preset R1086 and R1087 maxi-
mum counterclockwise.
• Preset "IQ Direct-current output"
ON.
• Operating freq. : 1300.00 MHz
• Mode
: DV mode
• Connect an RF power meter or
50
Ω
dummy load to the antenna
connector.
• Transmitting
Rear
panel
Connect an ammeter
between the DC power
supply and ID-1.
100 mA higher
from the pre-
set position.
MAIN
unit
R1087
2
100 mA higher
from step 1.
MAIN
unit
R1086
REFERENCE
FREQUENCY
[ REF Crystal
adjustment]
1 • Operating freq. : 1300.00 MHz
• Mode
: FM mode
• Connect an RF power meter or
50
Ω
dummy load to the antenna
connector.
• Transmitting
Rear
panel
Loosely couple a fre-
quency counter to the
antenna connector.
1300.0000 MHz
PC
screen
[ REF
Crystal
adjust-
ment]
FM
CARRIER
[ FPGA D.C.
voltage ad-
justment
/FM I]
1 • Operating freq. : 1300.00 MHz
• Mode
: FM mode
• Connect an RF power meter or
50
Ω
dummy load to the antenna
connector.
• Transmitting
MAIN
unit
C o n n e c t a d i g i t a l
multimeter or an oscillo-
scope to the check point
"CP30".
T h e s a m e
vo l t a g e t h a t
dur ing in DV
m o d e ( T X )
at the check
point "CP30".
PC
screen
[ FPGA
D.C.
voltage
adjust-
ment
/FM I]
[ FPGA D.C.
voltage ad-
justment
/FM Q]
2 • Transmitting
T h e s a m e
adjustment as
step 1, if need.
PC
screen
[ FPGA
D.C.
voltage
adjust-
ment
/FM Q]
OUTPUT
POWER
[ TX output
adjustment]
1 • Operating freq. : 1300.00 MHz
• Mode
: FM mode
• TX power
: High
• Transmitting
Rear
panel
Connect an RF power
meter to the antenna
connector.
11 W
MAIN
unit
R1251
FM
DEVIATION
[ FM
modulation
adjustment]
1 • Operating freq. : 1270.00 MHz
• Mode
: FM mode
• Connect an audio generator to
the [MIC] connector and set as
:
1.0 kHz/20 mVrms
• Set a Modulation analyzer as:
HPF
: OFF
LPF
: 20 kHz
De-emphasis : OFF
Detector :
(P–P)/2
• Transmitting
Rear
panel
Connect a modulation
analyzer to the antenna
connector through an
attenuator.
±4.35 kHz
MAIN
unit
R1704
DSP INPUT
LEVEL
[ D S P i n p u t
level adjust-
ment]
1 • Operating freq. : 1270.00 MHz
• Connect an audio generator to
the [MIC] connector and set as
:
1.0 kHz/20 mVrms
• Connect an RF power meter or
50
Ω
dummy load to the antenna
connector.
• Transmitting
LOGIC-1
unit
C o n n e c t a n o s c i l l o -
scope to the check point
"CP207".
750 mVp-p
MAIN
unit
R1707
Summary of Contents for ID-1
Page 1: ...SERVICE MANUAL DIGITAL TRANSCEIVER S 14120IZ C1 May 2005...
Page 45: ...SECTION 10 BLOCK DIAGRAM 10 1 10 1 MAIN UNIT 4...
Page 46: ...10 2 LOGIC 1 UNIT 10 3 RC 24 10 2...
Page 47: ...SECTION 11 VOLTAGE DIAGRAM 11 1 MAIN UNIT 11 1...
Page 48: ...11 2...
Page 49: ...11 3...
Page 50: ...11 4 11 2 LOGIC 1 UNIT...
Page 51: ...11 5...
Page 52: ...11 6 11 3 RC 24...
Page 54: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14120IZ C1 2005 Icom Inc...