Yaesu FTM-7250DR, Technical Supplement

Page: 7 / 52

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-3
To enter the Alignment mode
1. Set the transceiver to the Analog-mode.
2.
Turn the transceiver off.
3. Press and hold in the [ B A N D
(
S Q L
) ] and
[
MODE
(
DG-ID
) ] keys while powering the trans-
ceiver on. The transceiver will enter the adjust-
ment mode, and the display will show the first
alignment setting. Thereafter, the frequencies
used during alignment will automatically be set
without action by the technician.
In the alignment process, each adjustment is
selected by rotating the
DIAL knob. The alignment
is performed by: pressing the [ V/M
(
MW
) ] key
injecting a signal of the required frequency and
level; making the adjustment; and then pressing
the [
V/M
(
MW
) ] key again, to store the adjustment.
To exit the alignment routine, press the [ GM
(
AMS
) ]
key.
As each transceiver is individually optimized at
the factory, the precise settings for the transceiver
on your bench may be slightly different.
PLL Reference Frequency Adjustment
1. Rotate the DIAL knob to select the Alignment
Menu " rF ".
2. Press the [ V/M
(
MW
) ] key.
3. Press the PTT switch to transmit and rotate the
DIAL
knob so that the frequency counter setting
is 440.000 MHz (±100 Hz).
4. R e l e a s e t h e
P T T
s w i t c h , t h e n p r e s s t h e
[
V/M
(
MW
) ] key.
RF Front-end Tuning
1. Inject a 145.100 MHz signal at a level of -9 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
2. Press the [ BAND
(
SQL
) ] key to enter the 144
MHz band.
3. Rotate the
DIAL
knob to select the Alignment
Menu "
tn
".
4. Press the [ V/M
(
MW
) ] key.
5. Adjust the DIAL knob so that the maximum-
SINAD.
6. Press the [ V/M
(
MW
) ] key.
7. Inject a 435.100 MHz signal at a level of -9 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
8. Press the [ BAND
(
SQL
) ] key to enter the 430
MHz band.
9. Rotate the DIAL knob to select the Alignment
Menu " tn ".
10. Press the [ V/M
(
MW
) ] key.
11. Adjust the DIAL knob so that the maximum-
SINAD.
12. Press the [ V/M
(
MW
) ] key.