Sansui 7900Z - Page 25

; 9900Z/8900ZDB/790
| FEED SIGNAL MEASURE
STEP| SUBJECT Seoul aa eet ADJUST | ADJUST FOR REMARKS
3.
|
Distortion
98
MHz
ANT
Input
Sameas
|
RECOUTL+<h
|dT1
Min.
THD
Adj. 65 dBf (59.8 dB) above (F-3300)
In case of SG FM SSG
STEREO Pilot 19 kHz (9% MOD)
L Mode 1 kHz + Pilot
(100% MOD)
98 MHz ANT Input Same as REC OUT L-ch
65 dBf (59.8 dB above Connect VTVM
FM SSG & Scope
Pilot -19 kHz (9% MOD)
L Mode Sub 1 kHz REC OUT R-ch |dVR3
Max. Output Read the output level
4. | Separation
of REC OUT
Adj.
Min, Output Confirm
Pilot (100% MOD) Connect VTVM_ | (F-3300) (Confirm output | R-ch->L-ch
STEREO SG & Scope Jevel should be
less than —40 dB
of L-ch output
level)
5. | Muting level 98 MHz ANT Input Same as STEREO dVR4 STEREO
Adj. 15 dBf (9.8 dB) FM SSG | above Indicator (F-3300) Indicator turns on
Pilot 19 kHz (9% MOD) or Output signal
Sub 1 kHz + Pilot comes out
(100% MOD)
STEREO SG 2
a — a
6. DOLBY FM 98 MHz ANT Input Same as REC OUT L-ch | VRO1 Output Jevel DOLBY FM
Adj. 65 dBf (59.8 dB above VTVM (F-2688) 560 mV DECODER Switch
(8900ZDB 100 Hz (100% MOD) ---ON
Only) FM SSG REC OUT R-ch | VRO2 Same as above VTVM (100k2/V)
VTVM (F-2688)
Fig. 4-1
| x EB) avra
dT1 aca cee) avAs
as act pag, aVRt oo
|
@
jen
D
= —f. eVR1
: [oars
H dics Ya)
| dVR2
I
| dVR3
dic4
|
@
re
] its]
| F-3300 R82 ce
\ dR83
red
Fig. 4-2
Fig. 4-3 ‘
VRO2 VRO1
(=) F-2688 (=)
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