Yaesu VX-8DR/E, Service Manual

Page: 23 / 118

23 VX-8R/E and VX-8DR/E Technical Supplement
B-Band 222 MHz Band Adjustment
Press the [ BAND ] key to select the 222 MHz Amateur
band.
Receiver Sensitivity Adjustment (TUNE DC)
Ì
Connect the test equipment as shown in Figure 2: RX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" TUNE DC ".
Ì
Set the RF Signal Generator output to 222.100 MHz, at
a level of -3 dBµ, ±3.5 kHz deviation with a 1 kHz au-
dio tone.
Ì
Press the [
V/M
] button (the " " icon will appear on
the display).
Ì
Rotate the
DIAL
knob for maximum deflection on the
SINAD meter.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
Squelch Hysteresis Confirmation (HIS SQL)
Ì
Rotate the
DIAL
knob to select the Alignment Menu
" HIS SQL ".
Ì
Confirm that the alignment value is "0".
Squelch Threshold Adjustment (THLD SQL)
Ì
Connect the test equipment as shown in Figure 2: RX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" THLD SQL ".
Ì
Set the RF Signal Generator output to 222.100 MHz, at
a level of -7 dBµ, ±3.5 kHz deviation with a 1 kHz au-
dio tone.
Ì
Press the [
V/M
] button (the " " icon will appear on
the display).
Ì
Press the [
F/W
] key two times to store the Squelch
Threshold level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
Squelch Tight Adjustment (TIGH SQL)
Ì
Connect the test equipment as shown in Figure 2: RX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" TIGH SQL ".
Ì
Set the RF Signal Generator output to 222.100 MHz, at
a level of 0 dBµ, ±3.5 kHz deviation with a 1 kHz audio
tone.
Ì
Press the [
V/M
] button (the " " icon will appear on
the display).
Ì
Press the [
F/W
] key two times to store the Squelch
Tight level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
FM S-Meter S-1 Adjustment (S1 LEVEL)
Ì
Connect the test equipment as shown in Figure 2: RX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" S1 LEVEL " with " NFM " icon.
Set the RF Signal Generator output to 222.100 MHz, at a
level of -2 dBµ, ±3.5 kHz deviation with a 1 kHz audio tone.
Ì
Press the [
V/M
] button (the " " icon will appear on
the display).
Ì
Press the [
F/W
] key two times to store the FM S-Meter
S-1 level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the displayy).
FM S-Meter Full-Scale Adjustment (S9 LEVEL)
Ì
Connect the test equipment as shown in Figure 2: RX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
"S9 LEVEL" with "NFM" icon.
Ì
Set the RF Signal Generator output to 222.100 MHz, at
a level of +25 dBµ, ±3.5 kHz deviation with a 1 kHz
audio tone.
Ì
Press the [
V/M
] button (the " " icon will appear on
the display).
Ì
Press the [
F/W
] key two times to store the FM S-Meter
Full Scale level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
Alignment