Pll And Baseband Adjustment - Icom ID-RP2 Service Manual

4-2 PLL AND BASEBAND ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
PLL LOCK 1 • Receiving
VOLTAGE
2 • Receiving
3 • Receiving
4 • Receiving
BASEBAND 1 • Connect the test plug to [TEST]
CLOCK connector or select the TX mode
"PN" in the utility screen.
• Transmitting
After adjustment, unplug the test plug or select the TX mode "Normal" in the utility screen.
I/Q 1 • Connect the test plug to [TEST]
BASEBAND connector or select the TX mode
TX SIGNAL "PN" in the utility screen.
• Transmitting
2 • Transmitting
3 • Transmitting
4 • Transmitting
After adjustment, unplug the test plug or select the TX mode "Normal" in the utility screen.
MEASUREMENT
UNIT LOCATION
IF unit C o n n e c t a d i g i t a l
multimeter or oscillo-
scope to the check point
"1051LV."
C o n n e c t a d i g i t a l
multimeter or oscillo-
scope to the check point
"1806LV."
C o n n e c t a d i g i t a l
multimeter or oscillo-
scope to the check point
"748LV."
C o n n e c t a d i g i t a l
multimeter or oscillo-
scope to the check point
"1374LV."
IF unit Connect a frequency
counter to the check
point "TC."
IF unit Connect an oscilloscope
to the check point "Q+."
Connect an oscilloscope
to the check point "I+."
C o n n e c t a d i g i t a l
multimeter between the
check points "I+" and "I
–."
C o n n e c t a d i g i t a l
multimeter between the
check points "Q+" and
"Q–."
C - 4 - 3
ADJUSTMENT
VALUE
UNIT ADJUST
1.5 V IF unit C278
1.5 V C286
1.5 V C469
1.5 V C474
10 MHz IF unit R535
400 mV IF unit R207
p-p
400 mV
p-p
R208
0 V R206
R205