Yaesu FTDX1200 Series, Technical Supplement

Page: 16 / 122

FT
DX
1200 Technical Supplement
Alignment
ALIGNMENT-5
REF OSC Adjustment

Disconnect the coaxial cable from J4004 on
the LOCAL Unit, then connect the frequency
counter to J4004.

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.

Rotate the Main Tuning Dial knob to select the
alignment parameter “1-04 FREQ”.

Rotate the [VFO-B/CLAR] knob so that the
frequency counter reading is “40.00000 ±5 Hz”.

Disconnect the frequency counter 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.
1st LO Noise Adjustment

Disconnect the coaxial cable from J4004 on
the LOCAL Unit, then connect the frequency
counter to J4004.

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.

Rotate the Main Tuning Dial knob to select the
alignment parameter “1-04 FREQ”.

Rotate the [VFO-B/CLAR] knob so that the
frequency counter reading is “40.00000 ±5 Hz”.

Disconnect the frequency counter 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.
Main Receiver Adjustment
1st Local Oscillator Adjustment

Set the following controls as indicated:
[ANT] : ANT 1
[IPO] : AMP1
[ATT] : OFF
[R.FLT] : AUTO
[AGC] : AUTO
[RF GAIN] : Fully clockwise

Connect the RF millivoltmeter to TP1042 on the
MAIN Unit.

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.

Rotate the Main Tuning Dial knob to select the
alignment parameter “2-01 Local1.8”.

Rotate the [VFO-B/CLAR] knob so that the DC
voltmeter reading is “0.620 – 0.625 V”.

Rotate the Main Tuning Dial knob to select the
alignment parameter “2-02 Local3.5”.

Rotate the [VFO-B/CLAR] knob so that the DC
voltmeter reading is “0.620 – 0.625 V”.

Rotate the Main Tuning Dial knob to select the
alignment parameter “2-03 Local7”.
mAin U
nit
(
R
eCeiveR
s
eCtion
)
A
lignment
P
oint
TP1042