Yaesu FTDX1200 Series, Technical Supplement

Page: 15 / 122

FT
DX
1200 Technical Supplement
Alignment
ALIGNMENT-4
loCAl U
nit
A
lignment
P
oints
TP4005
2nd/3rd Local Oscillator Adjustment

Disconnect the coaxial cable from J4004 on the
LOCAL Unit, then connect the RF millivoltme-
ter to J4004.

Confirm that the correct level is present on the
RF millivoltmeter (0 dBm +- 3dB).

Disconnect the RF millivoltmeter from J4004,
then re-connect the RF millivoltmeter to J4004.
Disconnect the coaxial cable from J4004 on the
LOCAL Unit, then connect the RF millivoltme-
ter to J4003.

Confirm that the correct level is present on the
RF millivoltmeter (0 dBm +- 3dB).

Disconnect the RF millivoltmeter from J4003,
then re-connect the coaxial cable to J4004.
VCO Adjustment

Connect the Digital DC voltmeter (high-Z) to
TP4005 on the LOCAL Unit.

Disconnect the coaxial cable from J4002 on the
LOCAL Unit, then connect the RF millivoltme-
ter to J4002.

Press and hold in the [1.8(1)], [3.5(2)], and [7(3)]
keys, while turning the radio on, to enter the
alignment mode.

Referring to the table below, select the appro-
priate “Alignment Parameter” using the Main
Tuning Dial knob per the chart below, and
adjust the listed components for the required
voltage, or confirm that the correct voltage is
present on each alignment parameter.

Disconnect the RF millivoltmeter from J4004,
then re-connect the coaxial cable to J4004.

Press and hold in the [MENU] button for one
second to save the new setting and exit the
alignment mode.
A
lignment
P
ArAmeter
1-07 VCO1-H
1-08 VCO1-L
1-09 VCO2-H
1-10 VCO2-L
1-11 VCO3-H
1-12 VCO3-L
1-13 VCO4-H
1-14 VCO4-L
A
djust
/ C
onfirm
Adjust TC4004
Confirm
Adjust TC4003
Confirm
Adjust TC4002
Confirm
Adjust TC4001
Confirm
dC
voltmeter
5.0 V ±0.1 V
At least 0.6 V
5.0 V ±0.1 V
At least 0.6 V
5.0 V ±0.1 V
At least 0.6 V
5.0 V ±0.1 V
At least 0.6 V
rf
millivoltmeter
At least –10 dBm
At least –10 dBm
At least –10 dBm
At least –10 dBm
At least –10 dBm
At least –10 dBm
At least –10 dBm
At least –10 dBm
J4002 J4004
J4003
TC4001 TC4002
TC4003 TC4004