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2-10
Installation
Analog Audio Output
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Electronically balanced and floating outputs simulate a true transformer output. The source impedance is 50.
The output is capable of driving loads of 600 or higher; the 100% modulation level is adjustable with the AO
100% control over a –6dBu to +24dBu range.
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If an unbalanced output is required (to drive unbalanced inputs of other equipment), it should be taken between
pin 2 and pin 3 of the XLR-type connector.
Connect the LOW pin of the XLR-type connector (#3 or #2, depending on your organization's standards) to
ground; take the HIGH output from the remaining pin. No special precautions are required even though one
side of the output is grounded.
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Use two-conductor foil-shielded cable (Belden 8451, or equivalent).
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At the 5750's output (and at the output of other equipment in the system), do not connect the cable's shield to
the CHASSIS GROUND terminal (pin 1) on the XLR-type connector. Instead, connect the shield to the chassis
ground at the input destination. Connect the red (or white) wire to the pin on the XLR-type connector (#2 or #3)
that is considered HIGH by the standards of your organization. Connect the black wire to the pin on the XLR-
type connector (#3 or #2) that is considered LOW by the standards of your organization.
AES3 Digital Input/Output
There are two AES3 and two AES3 outputs.
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Digital 1 input accepts a standard AES signal and can operate at 32, 44.1, 48, 88.2 and 96 kHz.
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Digital 2 input also accepts the same standard AES signals as listed above, or can be switched to an AES sync
signal.
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Digital 1 Output carries either the FM Left/Right pre or de-emphasized output or the HD Left/Right output.
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Digital 2 Output carries the same outputs as Digital 1 Output but adds the option for Digital MPX (DMPX)
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Per the AES3 standard, each digital input or output line carries both the left and right stereo channels. The
connection is 110 balanced. The AES3 standard specifies a maximum cable length of 100 meters. While almost
any balanced, shielded cable will work for relatively short runs (5 meters or less), longer runs require used of
110 balanced cable like Belden 1800B, 1801B (plenum rated), multi-pair 180xF, 185xF, or 78xxA. Single-pair
category 5, 5e, and 6 Ethernet cable will also work well if you do not require shielding. (In most cases, the tight
balance of Category 5/5e/6 cable makes shielding unnecessary.)
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The AES3id standard is best for very long cable runs (up to 1000 meters). This specifies 75 unbalanced coaxial
cable, terminated in male BNC connectors. A 110/75 balun transformer is required to interface an AES3id
program input or output. Conversely, the wordclock / AES11id sync input is designed for 75 operation.
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