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41
FZDA07ELEF2/EREF2/MRHF2
ADJUSTMENT
●
X05-615
Item
Adjustment Method and Adjustment Values
Conditions
1. Check power
supply voltage
q
Check output voltage at the power supply unit. TP119: 8.0±0.16V
• No signal: Can use RF signal of 9CH,
color bar and 70dBµ
2. Adjustment of
diversity free-run
frequency VR100
q
Connect the frequency counter between TP121 and TP124 (GND)
w
Make connection between TP122 and TP124 (GND)
e
Tune VR100 to set the frequency to 15.734±0.1kHz
r
Reset TP122 to “OPEN” after the tuning
• Antenna input = No signal
• Frequency counter
3. TV and Stereo
Adjustment of
separation VR300
q
Apply TV antenna input terminal the 9ch color bar and RF signal of
70dBµ
w
Set the voice modulation frequency to 1kHz, the modulation frequency
shift to ±25kHz and the mode only to stereo Rch
e
Connect the oscilloscope to TP305 and TP311 (GND) and tune the
VR300 to get the minimum output amplitude
• TV signal generator
• TV audio multiple signal generator
4. TV S-meter
adjustment VR302
q
Apply TV antenna input terminal the 9ch color bar and RF signal of
30dBµ
w
Audio signal shall not be modulated
e
Connect the DC voltmeter between TP312 and TP313 (GND) and tune
VR302 to get 1.80±0.05V
• 30dBµ shall be measured with the
terminal impedance of 75
Ω
• PS ratio = 6dB
• TV signal generator