Transmitter Adjustment - Icom ID-1 Service Manual

5-3 TRANSMITTER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
YGR 1 • Preset R1086 and R1087 maxi-
CURRENT mum counterclockwise.
[ FPGA D.C. • Preset "IQ Direct-current output"
voltage ad- ON.
justment • Operating freq. : 1300.00 MHz
2
/DV I ] • Mode
• Connect an RF power meter or
50 Ω dummy load to the antenna
connector.
• Transmitting
REFERENCE 1 • Operating freq. : 1300.00 MHz
FREQUENCY • Mode
[ REF Crystal • Connect an RF power meter or
50 Ω dummy load to the antenna
adjustment]
connector.
• Transmitting
FM 1 • Operating freq. : 1300.00 MHz
CARRIER • Mode
[ FPGA D.C. • Connect an RF power meter or
50 Ω dummy load to the antenna
voltage ad-
justment connector.
/FM I] • Transmitting
[ FPGA D.C. 2 • Transmitting
voltage ad-
justment
/FM Q]
OUTPUT 1 • Operating freq. : 1300.00 MHz
POWER • Mode
[ TX output • TX power
adjustment] • Transmitting
FM 1 • Operating freq. : 1270.00 MHz
DEVIATION • Mode
[ FM • Connect an audio generator to
modulation the [MIC] connector and set as
adjustment]
• Set a Modulation analyzer as:
HPF
LPF
De-emphasis : OFF
Detector
• Transmitting
DSP INPUT 1 • Operating freq. : 1270.00 MHz
LEVEL • Connect an audio generator to
[ D S P i n p u t the [MIC] connector and set as
level adjust-
ment] • Connect an RF power meter or
50 Ω dummy load to the antenna
connector.
• Transmitting
UNIT
Rear
panel
: DV mode
Rear
: FM mode panel
MAIN
: FM mode unit
Rear
: FM mode panel
: High
Rear
: FM mode panel
: 1.0 kHz/20 mVrms
: OFF
: 20 kHz
: (P–P)/2
LOGIC-1
unit
: 1.0 kHz/20 mVrms
5 - 5
MEASUREMENT
LOCATION
Connect an ammeter
between the DC power
supply and ID-1.
Loosely couple a fre-
quency counter to the
antenna connector.
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".
Connect an RF power
meter to the antenna
connector.
Connect a modulation
analyzer to the antenna
connector through an
attenuator.
C o n n e c t a n o s c i l l o -
scope to the check point
"CP207".
ADJUSTMENT
VALUE
UNIT ADJUST
100 mA higher MAIN
from the pre- unit
set position.
100 mA higher MAIN
from step 1. unit
1300.0000 MHz PC [ REF
screen
T h e s a m e PC [ FPGA
vo l t a g e t h a t screen
during in DV
m o d e ( T X )
at the check
point "CP30".
T h e s a m e PC [ FPGA
adjustment as screen
step 1, if need.
11 W MAIN
unit
±4.35 kHz MAIN
unit
750 mVp-p MAIN
unit
R1087
R1086
Crystal
adjust-
ment]
D.C.
voltage
adjust-
ment
/FM I]
D.C.
voltage
adjust-
ment
/FM Q]
R1251
R1704
R1707