Blonder tongue AMM-806, Справочное руководство, Страница: 54 / 285

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DAP - Digital to Analog Processor
CC:EIA-608:
This is the Closed Captioning command mode. The Closed
Captioning, also known as line 21 captions per EIA-608 is the
standard for Closed Captioning for NTSC Broadcasts in the United
States. An operator can globally enable or disable Closed Captioning
for each module eliminating the need to adjust individual TV
viewing locations.
OUTPUT CHANNEL MODE:
The DAP OUTPUT CHANNEL MODE can be set to standard CATV,
HRC or IRC offsets as well as frequency tuning mode.
The frequency tuning mode allows a user to program a desired
output frequency in 12.5 kHz steps. The unit will automatically
round an improper entry to the nearest appropriate value. This
mode is generally not used in typically deployments and only
intended for special applications such as PAL usage.
OUTPUT LEVEL:
The RF OUTPUT LEVEL is user adjustable by pressing the p (UP)
or q (DN) arrow buttons. The output level is not changed until
the ENTER button is pressed. The level increments in 0.2 dB steps.
Pressing and holding the p (UP) or q (DN) buttons will allow
for faster scrolling. The display range is 48—62 dBmV. Output
level accuracy is typ/- 1 dB of display, +/- 2 dB worst case.
Optimum SNR performance is achieved by setting the unit output
@ +60 dBmV.
ANALOG RF OUTPUT:
The ANALOG RF OUTPUT is programmable by channel or frequency.
Entries are made by pressing the p (UP) or q (DN) arrow buttons
to reach the desired channel. The RF output is not changed until
the ENTER button is pressed. Pressing and holding the p (UP)
or q (DN) buttons will allow for faster scrolling. The ANALOG RF
OUTPUT mode is displayed with the desired entry.