Optimod-AM 9400 V1.2 Operating Manual - Orban

Headphones ....................................................................................................................1-24
EAS TEST......................................................................................................................1-24
Figure 1-2: NRSC Modified 75 µs De-emphasis..............................................................1-25
PC CONTROL AND SECURITY PASSCODE.............................................................................1-25
WHY THE NORTH AMERICAN NRSC STANDARD...............................................................1-26
Figure 1-3: NRSC Lowpass Filter .....................................................................................1-26
AM Stereo Introduces a Pre-emphasis Dilemma ...........................................................1-26
NRSC Standard Pre-emphasis and Low-pass Filtering ...................................................1-27
WARRANTY, USER FEEDBACK...........................................................................................1-28
User Feedback........................................................................................................1-28
LIMITED WARRANTY.............................................................................................1-28
INTERNATIONAL WARRANTY ...............................................................................1-28
EXTENDED WARRANTY ........................................................................................1-29
Section 2 Installation
.........................................................................................................................................2-1
INSTALLING THE 9400.......................................................................................................2-1
Figure 2-1: AC Line Cord Wire Standard..........................................................................2-2
Figure 2-2: Wiring the 25-pin Remote Interface Connector...........................................2-4
Figure 2-3: 9400 Serial Port Pin Identification.................................................................2-4
Figure 2-4: Jumper Positions, Monitor Roll-Off Filter .....................................................2-5
Figure 2-5: Frequency Response Curves as Function of ROLLOFF Control, Monitor Rolloff
Filter Strapped for 18 dB/Octave......................................................................................2-6
Figure 2-6: Monitor Rolloff Filter Schematic Diagram....................................................2-7
9400 REAR PANEL ...........................................................................................................2-7
INPUT AND OUTPUT CONNECTIONS.....................................................................................2-8
Cable.........................................................................................................................2-8
Connectors ...............................................................................................................2-8
Analog Audio Input.................................................................................................2-9
Analog Audio Outputs............................................................................................2-9
AES3 Digital Input and Output.............................................................................2-10
Grounding..............................................................................................................2-11
Power Ground........................................................................................................2-11
Circuit Ground .......................................................................................................2-11
9400 FRONT PANEL .......................................................................................................2-12
STUDIO LEVEL CONTROLLER INSTALLATION (OPTIONAL) .......................................................2-13
If you are using Orban 8200ST external AGC......................................................2-14
Figure 2-7: 8200ST Jumper Settings (*Factory Configuration) .....................................2-15
QUICK SETUP.................................................................................................................2-16
ANALOG AND DIGITAL I/O SETUP.....................................................................................2-23
Figure 2-8: Effect of the LPF Shape Control with F = 5.0 kHz.......................................2-27
Overview of Transmitter Equalization...........................................................................2-32
Description of the TX EQ Controls .................................................................................2-32
Procedure for LF Equalization........................................................................................2-32
Figure 2-9: Unequalized RF envelope (showing tilt).....................................................2-33
Figure 2-10: RF envelope requiring no tilt equalization...............................................2-33
Figure 2-11: Unequalized RF envelope (showing ringing) ...........................................2-35
Figure 2-12: RF envelope showing successful HF equalization.....................................2-35
AUTOMATION USING THE 9400’S INTERNAL CLOCK............................................................2-39
SECURITY AND PASSCODE PROGRAMMING.........................................................................2-42
To Create a Passcode: ............................................................................................2-43