— 6 —
2. Free running frequency adjustment
• Conditions
(1) Signal
No signal (PAL standard signal should be applied only at synchronous check)
(2) Signal level
Input electric field only at synchronous check: 70 dBµ (terminated with 75-ohm resistance),
P/S = 10 dB
(3) Other conditions
CCIR IF input only at synchronous check (input electric field with 75-ohm termination).
Power supply: VCC1-1(P105) = 13.50 ± 0.05 [V]
Connect SYF terminal (P702) and GND.
Room temperature: 25 ± 5 [°C]
• Adjustment
Monitoring HDB (P704) with a frequency counter, adjust VR700 so that the frequency is 15.625± 0.1
[kHz].
• Caution
(1) Disconnect the wire between SYF terminal and GND. When inputting Applying IF signal, make
sure that synchronization is normal on the display.
• Block diagram
L-PCB
SYF
HD
GND
Frequency
Counter
VCC1-1
IF signal
Signal
generator
Stabilizer
To Next Page
Loading...
