OPTIMOD-FM/HD 8600

Performance

Frequency Response(Bypass Mode; Analog Processing Chain)
Follows standard 50µs or 75µs preemphasis curve ±0.10 dB, 2.0 Hz - 15 kHz.

Samplerate
64 kHz to 512 kHz, depending on processing being performed.

Noise
Output noise floor will depend upon how much gain the processor is set for (Limit Drive, AGC Drive, Two-Band Drive, and/or Multiband Drive), gating level, equalization, noise reduction, etc. It is primarily governed by the dynamic range of the A/D converter, which has a specified overload-to–noise ratio of 110 dB. The dynamic range of the digital signal processing is 144 dB.

Total System Distortion (de-emphasized, 100% modulation)
<0.01% THD, 20 Hz - 1 kHz, rising to <0.05% at 15 kHz. <0.02% SMPTE IM Distortion.

Total System Separation
> 55 dB, 20 Hz - 15 kHz; 60 dB typical.

Polarity (Two-Band and Bypass Modes)
(Two-Band and Bypass Modes): Absolute polarity maintained. Positive-going signal on input will result in positive-going signal on output when HD Polarity and FM polarity controls are set to POSITIVE.
 

Delay

Defeatable Analog FM Processing Delay
0.27 to 12.0 seconds. Delay adjustments of less than ±1.3 seconds are applied to the HD path to prevent FM analog artifacts.

Minimum Processing Delay
3.7 ms to 270 ms, processing structure dependent. Multipath Mitigator delay = 146 ms.
 

Analog Audio Input

Configuration
Stereo.

Impedance
> 10kΩ load impedance, electronically balanced1.

Nominal Input Level
Software adjustable from –4.0 to +13.0 dBu (VU).

Maximum Input Level
+27 dBu.

Connectors
Two XLR-type, female, EMI-suppressed. Pin 1 chassis ground, Pins 2 (+) and 3 electronically balanced, floating and symmetrical.

A/D Conversion
24 bit 128x oversampled delta sigma converter with linear-phase anti-aliasing filter.

Filtering
RFI filtered, with high-pass filter at 0.15 Hz.
 

Analog Audio Output

Configuration
Stereo. The analog output can emit the analog FM processed signal, the digital radio processed signal, or the low-delay monitor signal. The FM processed signal can be flat or pre-emphasized (at 50μs or 75μs), software-selectable.

Source Impedance
50 Ω, electronically balanced and floating.

Load Impedance
600 Ω or greater, balanced or unbalanced. Termination not required, or recommended.

Output Level
(100% peak modulation) Adjustable from -6 dBu to +24 dBu peak, into 600 Ω or greater load, software-adjustable.

Signal-to-Noise
≥ 90 dB unweighted (Bypass mode, de-emphasized, 20 Hz - 15 kHz bandwidth, referenced to 100% modulation).

Crosstalk
≤ -70 dB, 20 Hz - 15 kHz.

Distortion
≤ 0.01% THD (Bypass mode, de-emphasized) 20 Hz - 15 kHz bandwidth.

Connectors
Two XLR-type, male, EMI-suppressed. Pin 1 chassis ground, Pins 2 (+) and 3 electronically balanced, floating and symmetrical.

D/A Conversion
24 bit 128x oversampled.

Filtering
RFI filtered.
 

Digital Audio Input

Configuration
Stereo per AES3 standard, 24 bit resolution, software selection of stereo, mono from left, mono from right or mono from sum.

Samplerate
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz.

Connector
XLR-type, female, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3 transformer balanced and floating, 110 Ω impedance.

Input Reference Level
Variable within the range of -30 dBFS to -10 dBFS.

J.17 De-emphasis
Software-selectable.

Filtering
RFI filtered.
 

Digital Audio Output

Configuration
Two outputs, each stereo per the AES3 standard. The outputs can be set independently to emit the analog FM processed signal, the digital radio processed signal, or the low-delay monitor signal. The FM processed signal can be configured in software as flat or pre-emphasized to the chosen processing pre-emphasis (50μs or 75μs). The digital radio processing chain receives the output of the multiband limiter and processes it through a look-ahead true peak limiter that operates in parallel with the main FM peak limiting system. The DR and FM signals are always simultaneously available. Each output can apply J.17 pre-emphasis if desired.

Samplerate
Internal free running at 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, or 96 kHz, selected in software. (Use 44.1 kHz or higher for best peak control.) Can also be synced to the AES3 SYNC input or the AES3 digital input at 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz, as configured in software.

Word Length
Software selected for 24, 20, 18, 16 or 14-bit resolution. First-order highpass noise-shaped dither can be optionally added, dither level automatically adjusted appropriately for the word length.

Connector
XLR-type, male, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3 transformer balanced and floating, 110 Ω impedance.

Output Level
(100% peak modulation) -20.0 to 0.0 dBFS, software controlled

Frequency Response through Digital Radio Processing Chain
For output sample rates of 44.1 kHz and above, the frequency response from input to DR-configured output is ±0.10 dB, 2.0 Hz - 20 kHz; flat or with J.17 pre-emphasis applied. The user may specify lowpass filtering to constrain the bandwidth to 15, 16, 17, 18, or 19 kHz.

Relative Time Delay between FM and HD Outputs
Depends on setting of analog processing channel diversity delay; up to 16 seconds is available. Once set, this delay is constant regardless of processing preset in use.
 

Digital Sync Input

Configuration
Used for synchronization of either or both AES3 signals to an external reference provided at this input.

Samplerate
32, 44.1, 48, 88.1 and 96 kHz, automatically selected.

Connector
XLR-type, female, EMI-suppressed. Pin 1 chassis ground, Pins 2 and 3 transformer balanced and floating, 110 Ω impedance.

Filtering
RFI filtered.
 

Digital Sync Input

Configuration
Accepts 1x wordclock or 10 MHz reference signals, automatically selected. The DSP master clock can be phase-locked to these signals, which in turn phase-locks the 19 kHz pilot tone frequency, facilitating singe-frequency network operation. The digital output sample frequency can also be locked to these signals.

Level
Unit will lock to 1x wordclock and 10 MHz squarewaves and sinewaves having a peak value of 0.5 V to 5.0 V.

Connector
BNC female, grounded to chassis, non-terminating to allow reference signals to be looped through via an external BNC “tee” connector (not supplied).
 

Composite Baseband Output

Number of Outputs
2 x analog; 1 x AES3 (MPX hardware only)

Subcarrier Modulation Mode
Standard double sideband mode or compatible single sideband/vestigial sideband mode with SSB/VSB crossover at 150 Hz. SSB/VSB mode adds approximately 12 ms of delay to the composite output signal.

Configuration
Two outputs, each with an independent software-controlled output level control, output amplifier and connector.

Source Impedance
0Ω voltage source or 75Ω, jumper-selectable. Single-ended, floating over chassis ground.

Load Impedance
37Ω or greater. Termination not required or recommended.

Maximum Output Level:]
+12.0 dBu (8.72 Vp-p).

Minimum Output Level
–12 dBu (0.55 Vp-p) for 0.5 dB adjustment resolution.

Pilot Level
Adjustable from 6.0% to 12.0%, software controlled.

Pilot Stability
19 kHz, ±0.5 Hz (10 degrees to 40 degrees C).

D/A Conversion
24-bit

Signal-to-Noise Ratio
<= 85 dB (Bypass mode, de-emphasized, 20 Hz - 15 kHz band- width, referenced to 100% modulation, unweighted).

Distortion:=
<= 0.02% THD (Bypass mode, de-emphasized, 20 Hz - 15 kHz bandwidth, referenced to 100% modulation, unweighted).

Stereo Separation (analog outputs)
At 100% modulation = 3.5Vp-p, > 60 dB, 30 Hz - 15 kHz. At 100% modulation = 1.0 - 8.0 Vp-p, > 55 dB, 30 Hz - 15 kHz.

Crosstalk-Linear
<= –80 dB, main channel to sub-channel or sub-channel to main channel (referenced to 100% modulation).

Crosstalk-Non-Linear
<= –80 dB, main channel to sub-channel or sub-channel to main channel (referenced to 100% modulation).

38 kHz Suppression
> = 70 dB (referenced to 100% modulation).

76 kHz & Sideband Suppression
> = 80 dB (referenced to 100% modulation).

Pilot Protection
60 dB relative to 9% pilot injection, ±250 Hz (up to 2 dB composite processing drive).

Subcarrier Protection (60-100 kHz)
> = 70 dB (referenced to 100% modulation; with up to 2 dB composite limiting drive; measured with 800 line FFT analyzer using “maximum peak hold ” display).

57 kHz (RDS/RBDS) Protection
50 dB relative to 4% subcarrier injection, ±2.0 kHz (up to 2 dB composite processing drive)
 

Analog composite outputs

Connectors
Two BNC, floating over chassis ground, EMI suppressed.

Maximum Load Capacitance
0.047μF (0Ω source impedance). Maximum cable length of 100 feet / 30 meters RG–58A/U.

Filtering
RFI filtered.
 

AES3 Composite Output (MPX hardware only)

Connector
One XLR-type, appearing on breakout cable

Sample Frequency>
192 kHz

Extension to Interim Industry Standard:
The composite baseband is internally sampled at 384 kHz and alternate samples are placed on the left and right audio channels. With compatible receiving hardware, this allows the entire baseband frequency range (0 to 99 kHz) to be accommodated without aliasing. If the frequency range of the SCA’ s applied to the digital output is limited to less than 96 kHz, this is fully compatible and interoperable with the existing system adopted by the industry, which uses only the left channel at 192 kHz.
 

Subcarrier (SCA) Inputs

Non-Digitized Inputs
2 x non-digitized analog are summed into the analog composite outputs but do not appear at the digital composite outputs.

Connectors
2 x BNC, unbalanced and floating over chassis ground, EMI suppressed.

Number of Inputs
2 x digitized analog. These are summed into the digital composite but do not appear on the analog composite outputs.

Resolution
16-bit conversion

Connectors
2 x BNC, appearing on breakout cable.

Impedance
> 600Ω

SCA Sensitivity (all inputs)
Variable from 220 mV p-p to > 10 V p-p to produce 10% injection. Sensitivity of analog inputs is screwdriver-adjustable by trim pots that are accessible through holes in the rear panel. Sensitivity of digitizing inputs is adjustable in software.

19 kHz Pilot Reference
Analog SCA2 input jack can be jumpered to provide a 19 kHz pilot reference output or to serve as a second analog SCA input. The phase of the reference signal can be set to 0°, 90°, 180°, or 270° with respect to the pilot tone appearing at the composite output. The default is 0°.
 

Remote Computer Interface

Supported Computer and Operating System
IBM-compatible PC running Microsoft Windows® 2000 (SP3 or higher)/XP/Vista/7/8/8.1.

Configuration
TCP/IP protocol via direct cable connect, modem, or Ethernet interface. Modem and other external equipment is not supplied.

Serial Connectors
RS–232 port (3) DB–9 male, EMI-suppressed. Serial Connector 1 uses PPP to provide for direct or modem connection to the 8600 PC Remote application. Serial Connector 2 supports communication to a computer or remote control system via simple ASCII commands for administration and recalling presets. Serial Connector 3 is reserved for future developments.

çEthernet Connector
Female RJ45 connector for 10-100 Mbps networks using CAT5 cabling. Native rate is 100 Mbps. Provides for connection to the 8600 PC Remote application through either a network, or, using a crossover Ethernet cable, directly to a computer.

Ethernet Networking Standard:=
TCP/IP.
 

Remote Control (GPI) Interface

Configuration
TCP/IP protocol via direct cable connect, modem, or Ethernet interface.

Voltage
6 - 15 V AC or DC, momentary or continuous. 9 VDC provided to facilitate use with contact closure.

Connector
DB-25 male, EMI-suppressed.

Control
User-programmable for any eight of user presets, factory presets, bypass, test tone, stereo or mono modes, analog input, digital input.

Filtering
RFI filtered.
 

Tally Outputs (x2)

Configuration
NPN open collector.

Maximum Voltage
30 VDC positive. Protected against reverse polarity by a diode; do not exceed 50 mA through this protection diode.

Maximum Current
30 mA; current must be limited externally.
 

Power

Voltage
90–240 VAC 50–60 Hz, 50 VA

Connector
IEC, EMI-suppressed. Detachable 3-wire power cord supplied.

Grounding
Circuit ground is independent of chassis ground can be isolated or connected with a rear panel switch.

Safety Standards
ETL listed to UL standards, CE marked.
 

Environmental

Operating Temperature
32 to 122 °F / 0 to 50 °C for all operating voltage ranges.

Humidity
0–95% RH, non-condensing.

Dimensions (W x H x D)
19” x 5.25” x 15.5” / 48.3 cm x 8.9 cm x 39.4 cm. Depth shown indicates rack penetration; overall front-to-back depth is 17.75” / 45.1 cm. Three rack units high.

RFI / EMI
Tested according to Cenelec procedures.

Shipping Weight
40 lbs. / 18.1 kg
 

Warranty

Five Years, Parts and Service
Subject to the limitations set forth in Orban’s Standard Warranty Agreement. Because engineering improvements are ongoing, specifications are subject to change without notice.