Yaesu FT-950, Technical Supplement

Page: 30 / 154

ALIGNMENT-16
Alignment
FT-950 Technical Supplement
MIC IN
MIC GND
FM MAX Deviation Adjustment
ˆ
Connect the Dummy Load, Wattmeter, and De-
viation Meter to the “ANT 1” Jack.
ˆ
Set the VFO-A frequency to 28.700 MHz in the
FM mode.
ˆ
Set the value of Menu item “056 F3E MIC ” to
“50”.
ˆ
Connect the Audio Generator to
pin 8 of the MIC jack (pin 7:
GND), then set the output level
to 2 mV @1 kHz.
ˆ
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.
ˆ
Rotate the Main Tuning Dial knob to select the
alignment parameter “V-02 F45”.
ˆ
P r e s s t h e P T T b u t t o n , t h e n r o t a t e t h e
[CLAR(VFO-B)] knob for 4.5 kHz (±0.2 kHz) on
the Deviation Meter.
ˆ
Release the PTT button.
ˆ
Press the [NAR] button to set the VFO-A operat-
ing mode to the FM-N mode.
ˆ
Rotate the Main Tuning Dial knob to select the
alignment parameter “V-03 F23”.
ˆ
P r e s s t h e P T T b u t t o n , t h e n r o t a t e t h e
[CLAR(VFO-B)] knob for 2.25 kHz (±0.15 kHz)
on the Deviation Meter.
ˆ
Release the PTT button.
ˆ
Press and hold in the [MENU] button for one sec-
ond to save the new setting and exit the align-
ment mode.
SWR Meter Adjustment
ˆ
Set the VFO-A frequency to 28.700 MHz in the
CW mode.
ˆ
Connect the 50-Ohm Dummy Load and Wattme-
ter to the “ANT 1” Jack.
ˆ
Connect the 1/4-inch 3-contact Plug to the KEY
jack (but, without the key).
ˆ
Set the Multi Function Meter to “SWR” by press-
ing the [METER] button.
ˆ
Disconnect the 3-pin plug from J1014 on the
MAIN Unit, then apply a 2.75 V DC voltage to
pin 2 of J1014, and 1.00 V DC to pin 3 of J1014.
ˆ
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.
ˆ
Rotate the Main Tuning Dial knob to select the
alignment parameter “W-03 S30.”
ˆ
Press the [MOX] button, then rotate the
[CLAR(VFO-B)] knob so that the SWR meter (on
the front panel) reading is “3.0”. The SWR meter
reading (3.0) is broad (few points). Therefore, set
the [CLAR(VFO-B)] knob to the center of this
broad range.
ˆ
Release the [MOX] button.
ˆ
Apply a 2.96 V DC voltage to pin 2 of J1014, and
1.00 V DC to pin 3 of J1014.
ˆ
Rotate the Main Tuning Dial knob to select the
alignment parameter “W-06 S30.”
ˆ
Press the [MOX] button, then rotate the
[CLAR(VFO-B)] knob so that the SWR meter (on
the front panel) reading is “3.0.” The SWR meter
reading (3.0) is broad (few points). Therefore, set
the [CLAR(VFO-B)] knob to the center of this
broad range.
ˆ
Release the [MOX] button.
ˆ
Apply a 3.81 V DC voltage to pin 2 of J1014, and
1.00 V DC to pin 3 of J1014.
ˆ
Rotate the Main Tuning Dial knob to select the
alignment parameter “W-09 S30.”
ˆ
Press the [MOX] button, then rotate the
[CLAR(VFO-B)] knob so that the SWR meter (on
the front panel) reading is “3.0.” The SWR meter
reading (3.0) is broad (few points). Therefore, set
the [CLAR(VFO-B)] knob to the center of this
broad range.
ˆ
Release the [MOX]button.
ˆ
Press and hold in the [MENU] button for 2 sec-
onds to save the new settings and exit the align-
ment mode.
ˆ
Re-connect the 3-pin plug to J1014 on the MAIN
Unit.