Yaesu VX-8DR/E, Service Manual

Page: 13 / 118

13 VX-8R/E and VX-8DR/E Technical Supplement
Alignment
TX Power (L3) Adjustment (L3 POWER)
Ì
Connect the test equipment as shown in Figure 1: TX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" L3 POWER ".
Ì
Press the [
V/M
] button (the " " icon will appear on the
display).
Ì
Press the
PTT
switch to transmit and rotate the DIAL
knob so that the Power Meter setting is 2.5 W (±0.1
W).
Ì
Release the
PTT
switch, then press the [
V/M
] button
(the " " icon will disappear on the display).
TX Power (L2) Adjustment (L2 POWER)
Ì
Connect the test equipment as shown in Figure 1: TX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" L2 POWER ".
Ì
Press the [
V/M
] button (the " " icon will appear on the
display).
Ì
Press the
PTT
switch to transmit and rotate the DIAL
knob so that the Power Meter setting is 1.0 W (±0.1
W).
Ì
Release the
PTT
switch, then press the [
V/M
] button
(the " " icon will disappear on the display).
TX Power (L1) Adjustment (L1 POWER)
Ì
Connect the test equipment as shown in Figure 1: TX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" L1 POWER ".
Ì
Press the [
V/M
] button (the " " icon will appear on the
display).
Ì
Press the
PTT
switch to transmit and rotate the DIAL
knob so that the Power Meter setting is 50 mW (+30
mW/ -20 mW) (VX-8E Type: 0.2W±0.05W).
Ì
Release the
PTT
switch, and then press the [
V/M
] but-
ton (the " " icon will disappear on the display).
TX Deviation Adjustment (MAX DEV)
Ì
Connect the test equipment as shown in Figure 1: TX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" MAX DEV ".
Ì
Set the AF Signal Generator output to 50 mVrms with
a 1 kHz audio tone.
Ì
Press the [
V/M
] button (the " " icon will appear on the
display).
Ì
Press the
PTT
switch to transmit and rotate the DIAL
knob so that the Deviation Meter setting is 4.2 kHz ±
0.2 kHz (USA version) or 4.5 kHz ± 0.2 kHz (EXP/EU
versions).
Ì
Release the
PTT
switch, and then press the [ MENU ]
key to change the operating mode to " AM " mode.
Ì
Increase the AF Signal Generator output to 100 mVrms.
Ì
Press the
PTT
switch to transmit and rotate the DIAL
knob for the 60 % (±10 %) modulation.
Ì
Release the
PTT
switch, and then press the [
V/M
] but-
ton (the " " icon will disappear on the display).
CTCSS TX Deviation Adjustment (100.0Hz)
Ì
Connect the test equipment as shown in Figure 1: TX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" 100.0Hz ".
Ì
Press the [
V/M
] button (the " " icon will appear on the
display).
Ì
Press the PTT switch to transmit without the micro-
phone input and rotate the DIAL knob so that the De-
viation Meter reading is 0.65 kHz (±0.05 kHz).
Ì
Release the PTT switch, then press the [
V/M
] button
(the " " icon will disappear on the display).
DCS TX Deviation Adjustment (DCS 023)
Ì
Connect the test equipment as shown in Figure 1: TX
Alignment Setup.
Ì
Rotate the DIAL knob to select the Alignment Menu
" DCS 023 ".
Ì
Press the [
V/M
] button (the " " icon will appear on the
display).
Ì
Press the PTT switch to transmit without the micro-
phone input and rotate the
DIAL
knob so that the De-
viation Meter setting is 0.65 kHz (±0.05 kHz).
Ì
Release the PTT switch, and then press the [
V/M
] but-
ton (the " " icon will disappear on the display).