Ctcss Tx Deviation Adjustment (100.0Hz); Dcs Tx Deviation Adjustment (Dcs 023); A-Band 50 Mhz Band Adjustment; Receiver Sensitivity Adjustment (Tune Dc) - Yaesu VX-8R/E Service Manual

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 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).

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

A-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".
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 52.100 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 read the Squelch
Threshold level.
Ì Press the [ V/M ] button (the " " icon will disappear on
the display).
Alignment
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