Comark EXACT-V2, Руководство пользователя, Страница: 26 / 94

USER MANUAL
MPD-1611291-A
EXACT-V2 High End Rack Modulator / Exciter
3/10/2017
MPD-1611291-A
Page 26/94
Figure 10: Sharp Filter Profile menu
2.7 Output Processing
The nominal output level of the main output “RF Out” is 0 dBm for the standard exciter
and 20dBm for the exciter with optional preamp. An attenuation between 0 and 17 dB
per increment of 0.1 dB can be set. In addition, an offset gain between -1 dB and + 1
dB per increment of 0.1 dB can be set. If needed, the output spectrum can be reversed.
A copy of the main signal is available on the “RF Monitor”. This output signal is the
same as the main "RF Out" signal but with a lower level (-20dB for the 0dBm exciter,
and -43dB for exciter with op20dBm internal preamp).
2.7.1 RF output muting and RF maintain features
The output can be muted either by the user or automatically in some conditions. The
un-mute is pre-configured to “progressive” (2 seconds). The mute function is available
for both ATSC standards.
Mute Mode Mute cases & conditions in ATSC
Manually set
Manual Mute
Starting Delay (after a boot)
Configurable mute conditions
Warm-up Time (before 10MHz regulation starts)
Loss of Reference TimeOut (LORS) see LORS Management
Table 3: Mute cases and configurable mute conditions
RF Maintain feature: