HE4000 Encoding System
Using the Front Panel
Front Panel Menu Summary
Command
Function
Options/Response Format
HE4000>Service
>SD Video>
Advance
Used to configure the HE4000
SD video encoding parameters.
This menu is recommended for use only by
advance user.
GOP Structure
Displays the GOP Structure – in
custom mode sets the GOP
Structure.
● IP2B (default), IPB, IP, I
GOP parameters should only be changed by
advanced users in special circumstances.
GOP Length
Displays the GOP length – in
custom mode sets the GOP
length
GOP (Group of pictures) variants allow for
adjustment of encoding parameters to optimize for
various uses. (see the latency settings above).
Custom GOP parameter settings may not work with
all IRDs and may adversely affect Encoder
bandwidth efficiency.
PCR Delay
Normally set to 0 msec
● 0 (default), Range +/ - 200 msec.
PCR offset is provided as an engineering tool
useful when interoperating with non-MPEG-
compliant equipment
PCR Rate
Sets the number of times per
second that the PCR is output
● 40 (default)
PCR – Program Clock Reference is adjustable
from 10 to 50 times per second.
HE4000>Service
>SD Video>
VBI
Used to configure the HE4000
SD video VBI parameters.
Mode
Used to set MODE for VBI
● Off (default)
● ATSC Close Captions
● ComtechTV close Captions (option for older
ComtechTV
decoders)
● 16 line VBI pass through (available only in 4:2:2
mode)
● 32 line VBI pass through (available only in 4:2:2
mode)
Quantization
Quantization Value reserve for
advance users
● 1 (default) Range from 1 to 31.
HE4000>Service
> HD
Video>Input
Used to configure the HE4000
video input section.
Note: for embedded audio,
Config>Service >Video>Input
Source must be set to digital,
Config>Service # >Audio must
be set to digital, and
Config>Service #
>Audio>Source must be set to
SDI.
Config>Service >Video>Input
3-20 01 -0951-404 Rev B