Alpine 7980M - Page 13

7980M
Step Signal Generator Dial Control Adjustment
Stereo 98.1MHz, Adjust VRO03 for Rch output to be
Separation ; 60d8 Audio minimum and confirm Lch and Rch
Adjustment Riga (Stereo Mod, vee Output output level difference is more
(Lch) Lch, only) than 25dB.
Adjust VROOQ2 for Lch and Rch
output level difference to be 8dB.
Stereo 98.1MHz,
Blend . 34dB Audio
; Figure 4 98.1MHz
Adjustment (Stereo Mod, Output
(Lch) Lch, only)
Stereo 98.1MHz,
Separation ; 60dB Audio Proceed same adjustment under
é Figure 4 98.1MHz ;
Adjustment (Stereo Mod, Output step 5 by alternating Lch and Rch.
(Rch) Rch, only)
Stereo 98.1MHz,
Blend : 34dB Audio Proceed same adjustment under
: Figure 4 98.1MHz
Adjustment (Stereo Mod, Output step 6.
(Rch) Rch, only)
2 SDK SECTION
(1) Dummy Antenna Circuit
1 1ohm 450hm—t
\ {
Input ; 600hm ‘ Output
' 1
ete ee a Oe ey ee er 4
For 50 ohm FM Signal Generator Figure 6
(2) Connections
SDK Modulator FM Signal Generator
Step| Test Point
TP10
AC VTVM
Antenna
Receptacle
FM Dummy Antenna
Figure 7
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