A-Band 430 Mhz Band Adjustment; Squelch Hysteresis Confirmation (His Sql); Squelch Threshold Adjustment (Thld Sql); Tight Squelch Adjustment (Tigh Sql) - Yaesu VX-8R/E Service Manual

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).
VX-8R/E and VX-8DR/E Technical Supplement
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).
Alignment
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