Yaesu VX-8R/E, Service Manual

Page: 9 / 118

9 VX-8R/E and VX-8DR/E Technical Supplement
Alignment
A-Band 430 MHz Band Adjustment
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 435.100 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 ".
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 435.100 MHz, at a level
of -12 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 SMeter
Full Scale 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 435.100 MHz, at a level
of +4 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 SMeter
Full Scale 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 435.100 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 FM SMeter
Full Scale 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 435.100 MHz, at
a level of +20 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 SMeter
Full Scale level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).
Wide 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 " WFM " icon.
Ì
Set the RF Signal Generator output to 435.100 MHz, at
a level of 0 dBµ, ±20 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 SMeter
Full Scale level.
Ì
Press the [
V/M
] button (the " " icon will disappear on
the display).