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