Orban Optimod-TV 8382, Operating Manual

Page: 29 / 244

OPTIMOD-TV DIGITAL INTRODUCTION
1-7
Analog Left/right Input/output
The left and right analog inputs are on XLR-type female connectors on the rear
panel. Input impedance is greater than 10k

; balanced and floating. Inputs can ac-
commodate up to +27dBu (0dBu = 0.775Vrms).
The left and right analog outputs are on XLR-type male connectors on the rear
panel. Output impedance is 50

; balanced and floating. The outputs can drive 600

or higher impedances, balanced or unbalanced. The peak output level is adjustable
from –6dBu to +24dBu.
Level control of the analog inputs and outputs is accomplished via software control
through System Setup (see step 3 on page 2-21 and step 7 on page 2-23) or through
PC Remote.
Provisions for Subcarriers
The correct peak level produced by the principal program modulation sometimes
depends on the number of subcarriers in use. Some regulatory authorities require
that total baseband peak modulation be maintained within specified limits. In this
case, the principal program modulation level must be reduced when a subcarrier is
turned on. The 8382’s remote control feature allows you to reduce the 8382’s output
level (thus reducing the principal program modulation level) by connecting an
on/off signal from your subcarrier generator. (See step 6 on page 2-3.) You define
the amount of reduction in percent using the procedure in step 19 on page 2-19.
See page 2-32 for information on programming the remote control interface.
Remote Control Interface
The Remote Control Interface is a set of eight optically isolated GPI inputs on a DB-
25 connector, which can be activated by 5-12V DC. They can control various func-
tions of the 8382:

Recall any Factory Preset, User Preset, Test Mode state (Bypass or Tone), or exit
from a Test Mode to the previous processing preset.

Switch the 8382 to use either the analog input or the digital input.

Switch the 8382 between stereo and dual mono modes.

Reset the 8382’s internal clock to the nearest hour or to midnight.
You can reconfigure the functions of the eight inputs via System Setup.
For example, if you are not using the stereo encoder, the three inputs
ordinarily dedicated to controlling the state of the stereo encoder can in-
stead be re-configured to call three additional presets.
See page 2-32 for information on programming the remote control interface.