Cisco Compact Reverse Transmitters 9008x with FP, DFB or CWDM Lasers Data Sheet
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Data Sheet
Cisco Compact Reverse Transmitters 9008x with
FP, DFB or CWDM Lasers
FP, DFB or CWDM Lasers
Compact nodes can be configured with a variety of optical reverse transmitters to
provide flexibility for use in multiple applications. The reverse transmitters are plug-in
modules that deliver a cost-effective, user-friendly solution for upstream transmission.
The Cisco
provide flexibility for use in multiple applications. The reverse transmitters are plug-in
modules that deliver a cost-effective, user-friendly solution for upstream transmission.
The Cisco
®
Compact Reverse Transmitters 9008x are available with Fabry-Perot
(FP), distributed feedback (DFB), or Coarse Wavelength Division Multiplexing
(CWDM) lasers.
(CWDM) lasers.
All reverse transmitters feature a built-in microprocessor and pilot tone for easy setup of the reverse path. The
pilot tone does not take up any reverse bandwidth, as it is placed at 5 MHz. Placing the pilot tone at 5 MHz also
makes the reverse transmitter interoperable with almost all reverse receivers in the marketplace. In the event of no
modulation, the pilot tone serves as a quieting tone, which reduces spurious noise and improves overall noise
performance with up to 15 dB. All reverse transmitters have increased gain, which allows low reverse input levels
at the node. Figure 1 shows the 90080 model.
Figure 1. Cisco Compact Reverse Transmitter 90080
Figure 2 provides a block diagram for the reverse transmitters.
Figure 2. Cisco Compact Reverse Transmitter 9008x Block Diagram