Genlock Reference; Auxilliary I/O; Aes Audio Connections; General Purpose Inputs And Outputs - evertz 7700 Manual

7700 MultiFrame Manual
7710UC-HD HD UpConverter
2.2.

GENLOCK REFERENCE

For proper synchronization of the output video, the upconverter must be locked to a genlock signal of the
output video format.
GENLOCK These two BNCs form a loop through for connecting a video or tri-level sync reference. The
genlock signal may be NTSC or PAL colour black, and is auto-detected by the module.
Jumper J9 on the APB3FMTCON submodule selects whether the reference input is
terminated to 75 ohms or high impedance (default). (See section 7.3). The Reference menu
item is used to select the correct type of video reference being used. The output video can
be timed with respect to the genlock video using the H Phase Offset and V Phase Offset
menu items. (See section 6.3.1) When no Genlock is provided, the output video is timed
with respect to the input video.
2.3.

AUXILLIARY I/O

On the 7710UC-HD a 9 pin D connector labelled AUX I/O contains 3 GPI inputs, and 1 GPO output and 4
unbalanced AES outputs. The connector pinout is shown in Table 1.
Pin
#
1
2
3
4
5
6
7
8
9

2.3.1. AES Audio Connections

Four unbalanced AES outputs are provided on the 9 pin D connector. These outputs are for unbalanced
AES signals conforming to SMPTE 276M. Two groups of embedded audio from the HD input are extracted
and re-embedded on the output video. The transferred audio is also output as four AES channels.

2.3.2. General Purpose Inputs and Outputs

3 pins on the 9 pin D connector are used for three General Purpose inputs (GPIs). The GPI1 and GPI2
inputs are used to select user presets 1 and 2 respectively. The GPIs are active low with an internal pull
up (3.6k ohm) resistor to +5V or +12V. The user can activate GPIs simply by connecting the GPI input
pins to Ground. This can be done with a button, switch, relay or an open collector transistor. See section
7.4 for information on selecting the pull-up voltage. Figure 3 shows the input circuit for the General
purpose inputs.
7710UC-HD-4
Name
AES1 AES 1 Output
GPO General Purpose Output – Not used at this time
Gnd Signal Ground
GPI2 General Purpose Input 2
AES4 AES 4 Output
GPI3 General Purpose Input 3 – software enabled via the
utilities menu
AES2 AES 2 Output
AES3 AES 3 Output
GPI1 General Purpose Input 1

Table 1: AUX I/O Connector Pin Definitions

Revision 1.3
Description