Cisco Cisco Compact EGC Segmentable Node A90200 Data Sheet
Optoelectronics
Compact 865 MHz Node Model 90285
Description
The flexible Model 90285 “two-in-one” 865 MHz
Node can serve as a trunk or distribution node to
feed architectures of various densities and addresses
divergent system needs. Available with two high level
RF output ports, it is ideal for delivering video as well
as high-speed data services over advanced hybrid
fiber coax (HFC) networks.
Node can serve as a trunk or distribution node to
feed architectures of various densities and addresses
divergent system needs. Available with two high level
RF output ports, it is ideal for delivering video as well
as high-speed data services over advanced hybrid
fiber coax (HFC) networks.
A directional coupler RF test point is provided at the
forward outputs and reverse transmitter, allowing for accurate signal level measurement. Surge protection is
provided for the RF ports, and the Compact node is equipped with a double gasket that includes an RF and a
water-dust gasket. All Compact nodes can be configured with a Scientific Atlanta status monitoring
transponder (SMC or HMS) to enable remote monitoring of critical node parameters and remote control of the
built-in 3-state reverse switch. By switching to detection mode (-6 dB) it can be observed from which part of
the network the ingress originated. Once a failure has been located, the defective network segment may be
isolated until the failure has been eliminated and the remaining part of the reverse path is ensured normal
traffic.
forward outputs and reverse transmitter, allowing for accurate signal level measurement. Surge protection is
provided for the RF ports, and the Compact node is equipped with a double gasket that includes an RF and a
water-dust gasket. All Compact nodes can be configured with a Scientific Atlanta status monitoring
transponder (SMC or HMS) to enable remote monitoring of critical node parameters and remote control of the
built-in 3-state reverse switch. By switching to detection mode (-6 dB) it can be observed from which part of
the network the ingress originated. Once a failure has been located, the defective network segment may be
isolated until the failure has been eliminated and the remaining part of the reverse path is ensured normal
traffic.
The design of the mechanics enables the node to be mounted indoor or in a cabinet and the built-in fiber
management can handle up to two fiber cables with 12 fibers each of a length of 3 meters. Internally, the
fibers can be spliced and fixed in a splice tray. Up to three fibers can be spliced with pigtails and connected to
the optical modules in the node - one for the receiver, one for the reverse transmitter, and one as spare fiber.
management can handle up to two fiber cables with 12 fibers each of a length of 3 meters. Internally, the
fibers can be spliced and fixed in a splice tray. Up to three fibers can be spliced with pigtails and connected to
the optical modules in the node - one for the receiver, one for the reverse transmitter, and one as spare fiber.
The node has a high gain front end and is delivered as a configured node containing all the necessary plug-in
modules except the reverse transmitter - i.e. Pads, equalizers 65/87 MHz diplex filters and 15 to 65 MHz
reverse filters are included. The node will be delivered with connection for 3.5/12 connectors.
modules except the reverse transmitter - i.e. Pads, equalizers 65/87 MHz diplex filters and 15 to 65 MHz
reverse filters are included. The node will be delivered with connection for 3.5/12 connectors.
The wide range of FP, DFB, and CWDM optical reverse transmitters provides solutions for many different
reverse applications. The output powers of 0 dBm, 3 dBm, or 6 dBm enables the use of long links.
reverse applications. The output powers of 0 dBm, 3 dBm, or 6 dBm enables the use of long links.
An attenuator type A77140.00xx available in 0 to 20 dB steps sets the output of the node. The default setting
of the node is 2x112 dBμV with 2 dB attenuation and the node in high gain mode. Pushing the push button in
2 seconds switches the Gain mode. Selecting the low gain mode will give an output level of 2x100 dBμV at 0
dB attenuation.
of the node is 2x112 dBμV with 2 dB attenuation and the node in high gain mode. Pushing the push button in
2 seconds switches the Gain mode. Selecting the low gain mode will give an output level of 2x100 dBμV at 0
dB attenuation.
The Gain Led will indicate the actual Gain
• Yellow - If the node is in Low Gain Mode (2x100 dBμV @ 0 dB attenuation)
• Green - If the node is in High Gain Mode (2x112 dBμV @ 2 dB attenuation)
• Flashing in one of the above-mentioned colors if the node is out of AGC range.
The Rx LED will indicate the status of the node:
The Rx LED will indicate the status of the node:
• Flashing red - If the optical receive level is above +1 dB
• Yellow - If the optical receive level is between -3 dB and +1 dB
• Green - If the optical receive level is between -6 dB and -3 dB
• Red - If the optical receive level is below -6 dB
The factory setting for the reverse transmitter OMI is 8% at 70 dBμV at the port and 0 dB pad in the reverse
path. The factory setting of the OMI for the pilot tone in the reverse transmitter is 4%. The reverse transmitter
is switched of if the optical input level gets below -7 dBm.
The factory setting for the reverse transmitter OMI is 8% at 70 dBμV at the port and 0 dB pad in the reverse
path. The factory setting of the OMI for the pilot tone in the reverse transmitter is 4%. The reverse transmitter
is switched of if the optical input level gets below -7 dBm.