Orban Optimod-AM 9400, Operating Manual

Page: 26 / 295

1-4
INTRODUCTION ORBAN MODEL 9400
through the 9400’s Ethernet port or serial port (connected to an external mo-
dem), or locally (by connecting a Windows® computer to the 9400’s serial port
through the supplied null modem cable).

The 9400 can be remote-controlled by 5-12V pulses applied to eight pro-
grammable, optically isolated “general-purpose interface” (GPI) ports.

9400 PC Remote software runs under Windows 2000 and XP. It communicates
with a given 9400 via TCP/IP over modem, direct serial, and Ethernet con-
nections. You can configure PC Remote to switch between many 9400s via a con-
venient organizer that supports giving any 9400 an alias and grouping multiple
9400s into folders. Clicking a 9400’s icon causes PC Remote to connect to that
9400 through an Ethernet network, or initiates a Windows Dial-Up or Direct Ca-
ble Connection if appropriate. The PC Remote software allows the user to access
all 9400 features (including advanced controls not available from the 9400’s
front panel), and allows the user to archive and restore presets, automation lists,
and system setups (containing I/O levels, digital word lengths, GPI functional as-
signments, etc.).
Versatile Installation

The 9400 controls the transmitted bandwidth of the analog channel to
meet government regulations , regardless of program material or equaliza-
tion. The high-frequency bandwidth of the analog processing channel can be
switched instantly in 500Hz increments between 4.5 kHz and 9.5 kHz (NRSC). The
lower cutoff frequencies meet the output power spectral density requirements
of ITU-R 328-5 without further low-pass filtering at the transmitter, while the 9.5
kHz filter meets the requirements of the NRSC-1 standard (North America). The
5.0 kHz filter makes the analog AM bandwidth compatible with HD AM trans-
mission. The lowpass filters have parametric cutoff shapes, allowing you to trade
off filter ringing against frequency response flatness.

OPTIMOD-AM compensates for inaccuracies in the pulse response (tilt,
overshoot, ringing) of transmitters and antenna systems with a powerful
four-parameter transmitter equalizer. A built-in square-wave generator makes
adjustment easy. Four sets of equalizer parameters can be stored and recalled, al-
lowing you to program day and night variations for two transmitters. You can set
equalization independently in the stereo sum and difference channels, facilitat-
ing adjustment in CQUAM AM stereo facilities.

The 9400 includes analog and AES3 digital inputs.

The analog inputs are transformerless, balanced 10k

instrumentation-
amplifier circuits. The analog outputs are transformerless balanced, and float-
ing (with 50

impedance) to ensure highest transparency and accurate pulse re-
sponse.