Sony BVU-950 - Page 90

BVU-950/920 Answer Key
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Briefly explain DG?
Differential GAIN changing luminance levels will change chroma
eveils.
What is the function of the switch in IC-1-1/2 of the DM-54 board?
R. F. switching
What are the RV-4 and RV-6 of the DM-54 board used for?
Balance the R. F. envelope for the chroma and luminance channels.
What is the function o f IC-2 of the DM-54 board?
PB/EE switch
What is the difference between a D. QO. Pulse and a guard band
pulse?
A G. B. Pulse is not muted in search mode and a D. QO. Pulse _ is
Basically what does the High Frequency Compensate Limiter do?
Side band EQ.
Briefly, how does the SP/CONV mode detector operate?
R.F. is demodulated in the area of Sync. tips of a conventionally
recorded tape. If Sync. is detected it's considered conventional, if no
Sync. is output it is considered SP.
Briefly describe how the DM board compensates for drop-out.
By inserting 1H delayed video over the drop out.
Why does the chroma circuit need an audio trap?
To remove Audio bias noise which may be present during Audio dubs.