Yaesu VX-8R/E, Service Manual

Page: 20 / 118

20 VX-8R/E and VX-8DR/E Technical Supplement
B-Band 50 MHz Band Adjustment
Press the [ BAND ] key to select the 50 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 52.100 MHz, at a
level of -10 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
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 ".
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 52.100 MHz, at a
level of -11 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
Threshold level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
Tight Squelch 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 52.100 MHz, at a level
of -3 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.
Ì
Set the RF Signal Generator output to 52.100 MHz, at a
level of -7 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 display).
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 52.100 MHz, at a
level of +20 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 FM S-Meter
Full Scale level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
Alignment