Operating instructions

OPTIMOD-AM DIGITAL TECHNICAL DATA
6-3
Source Impedance: Electronically balanced and floating outputs simulate a true trans-
former output. Because of the built-in third-order EMI suppression filter, the source im-
pedance is 351. Loading the output with 600 will decrease the output level by 4.0 dB
compared to a high impedance (bridging) load and will reduce the maximum available
output level by 4.0 dB. A software switch in Analog Output screen allows the output level
calibration to be set for a bridging or 600 load.
Load Impedance: 600 or greater, balanced or unbalanced. Termination not required or
recommended.
Output Level (100% peak modulation): Adjustable from –6 dBu to +20 dBu peak, into 600
or greater load, software-adjustable.
Signal-to-Noise: >= 90 dB unweighted (Bypass mode, de-emphasized, 20 Hz–9.5 kHz
bandwidth, referenced to 100% modulation).
L/R Crosstalk: <= –70 dB, 20 Hz–9.5 kHz.
Distortion: <= 0.01% THD (Bypass mode, de-emphasized) 20 Hz–9.5 kHz bandwidth.
Connectors: Four 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.
Sampling Rate: 32, 44.1, 48, 88.2, or 96 kHz, automatically selected.
Connector: XLR-type, female, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3 trans-
former balanced and floating, 110 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 Outputs
Configuration: Stereo per AES3 standard.
Sample Rate: Internal free running at 32, 44.1, 48, 88.2 or 96 kHz, selected in software.
Can also be synced to the AES3 digital input at 32, 44.1, 48, 88.2 or 96 kHz, as config-
ured 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 appro-
priately for the word length.
Configuration: Both outputs can be switched independently to emit either the signal proc-
essed for analog modulation, the signal processed for digital modulation, or the low-
delay monitor signal.
Connector: Two XLR-type, male, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3
transformer balanced and floating, 110 impedance.
Output Level (100% peak modulation): –20.0 to 0.0 dBFS software controlled.
Filtering: RFI filtered.
Remote Computer Interface
Configuration: TCP/IP protocol via direct cable connect, modem, or Ethernet interface.
Suitable null modem cable for direct connect is supplied. Modem is not supplied.