DAA2 & DAX — P/N 53265:A1 8/24/2011 75
Section 5: Fiber Option Modules
The DVC-PCC and all other DAL devices except fiber DAA amplifiers support wire media as
shipped. The use of fiber optic media requires the use of fiber option modules. Each DAL device
can be used with either one or two modules. This flexibility allows for the creation of digital audio
networks with mixed wire, multi-mode fiber, and single-mode fiber segments on the same loop.
Fiber option modules consist of the following models:
One or two fiber option modules may be connected to a DAX or DAA2 board to convert it from a
board with two wire DAP ports to:
• a board with one wire and one fiber port,
• a board with two single-mode fiber ports,
• a board with two multi-mode fiber ports, or
• a board with one single-mode and one multi-mode fiber port.
When a fiber option module is mounted on a DAA2 or DAX, it disables the corresponding wire
terminals.
• DAA2: TB2 (Digital Audio Port A) is disabled when a fiber option board is connected at J9.
TB3 (Digital Audio Port B) is disabled when a fiber option board is connected at J10.
• DAX: TB1 (Digital Audio Port A) is disabled when a fiber option board is connected at J2.
TB2 (Digital Audio Port B) is disabled when a fiber option board is connected at J3.
5.1 Specifications
Single- and Multi-mode Fiber-Optic Digital Audio Ports
LC Style connection.
Supervised.
Fiber optic cable, multi-mode: 50/125 or 62.5/125 micrometers.
Fiber optic cable, single-mode: 9/125 micrometers.
Attenuation of cabling between two nodes (fiber-optic circuits are point-to-point) must not
exceed the maximum attenuation, specified below.
To determine attenuation:
1. Find the rated dB loss per foot within the cable manufacturer’s specifications. Determine
the total attenuation between the two nodes due to the cable.
Loss = (loss/ft.) x (length in feet)
Model Fiber Type For direct fiber connection between.... Not Used on
DS-FM multi-mode Two DAL devices Single or multi-mode DVC-
PCA, DVC-PCB or DAA.
DS-SFM single-mode Two DAL devices. An ST® style connector is
required at a single-mode DVC/DAA end.
Multi-mode DVC-PCA,
DVC-PCB or DAA.
DS-RFM multi-mode Two DAL devices, one of which is a multi-mode
fiber DVC or DAA. An ST® style connector is
required at the multi-mode DVC/DAA end.
Single-mode DVC-PCA,
DVC-PCB or DAA.
Table 5.1 Fiber Option Module Models
NOTE: Whenever a fiber option module is used on a DAL device port, the next DAL device that
is linked to that port must have the same model fiber option module (with the exception of single-
and multi-mode DVCs and DAAs).
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