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NEW Narda/Loral CEL 8450 & 8450RD Cell Guard for Cellular Power/VSWR Monitoring. Comes with what you see in the pictures. If you don't see it you probably wont get it. Specifications are from manufacturer and may vary slightly due to upgrades, revisions or options this unit may or may not have. The units are in new or like new-condition. The Narda CellGuard is a precise in line instrument that continually measures forward and reflected RF power and calculates actual VSWR in cellular systems. Designed for universal operation in analog or digital systems, the Model CEL8450 utilizes a low loss, high directivity coupler combined with a built-in microprocessor to provide state-of-the-art accuracy and flexibility. Long-term system monitoring of antenna or transmission line, which are prone to environmental damage, can now be provided by the CellGuard which features a VSWR (or return loss) threshold alarm. Therefore, before critical mismatches occur, system operators can be alerted to degradation that affect operations, equipment and revenues. Service technicians can now rapidly measure forward and reflect power, have VSWR displayed directly, and verify the VSWR threshold alarm setting via the 16-character alphanumeric, backlit display. The CellGuard also features an RS-485 compatible interface that outputs four values (transmit power, reflected power, VSWR and alarm threshold) continuously, and allows remote alarm resetting and alarm threshold variation inputs. If the alarm threshold is exceeded, a built-in Form C relay (normally closed) opens to directly drive external warning devices, if required. Front panel LED's signal normal (green) or alarm (red) modes. Packaged in a rugged aluminum housing with a protected display, the CellGuard operates off 20 to 28 VDC, uses precision Type "N" connectors, and remains accurate throughout its specified operating temperature. Frequency Range: 820-980 MHz Power Measurement Range: 0.600 (600 milliwatts) mW to 600 W CW (30 dB) Max. Input Power (CW): 750W (into 2.0:1 Load) Insertion Loss: 0.15 dB max. (0.07 dB typ.) Instrument VSWR (Input and Output): 1.07:1 Max. (1.04:1 typ.) Reflected Power Measurement Range: 1.07 to 3.0:1 VSWR (30 to 6 dBr) **Alarm Threshold Range: 1.20 to 3.0:1 VSWR (20 to 6 dBr) Coupler Directivity: 30 dB min. (35 dB typ.) *Power: +20 to +28 VDC @ 100 ma* RF Connectors Input and Output: Multi-Pin Connector: 15 Pin "D" Miniature Male * Cel 8450RD +20 to 28 VDC @ 200 mA ** The reflected power threshold accuracy is mainly limited by interal coupler's directivity. Narda recommends at least a 10 dB margin between directivity and maximum threshold. For More Pictures Please Click the Following Links: * Picture 2 - Front of the Rackmount Panel with RF Connector * Picture 3 - Front of the Rackmount Panel - Meter & Indicators * Picture 4 - Back of the Meter on the Rackmount Panel * Picture 5 - Back of the Rackmount Panel - RF Connector (It is straight through) * Picture 6 - Front of the CellGuard * Picture 7 - Back of the CellGuard * Picture 8 - Right of the CellGuard * Picture 9 - Left of the CellGuard (We do not proofread any ads submitted by members) |
sofia_mayo@desmoines-classifieds.com (Sofia Mayo) for more information. Your emails will be instantly forwarded to the poster's private address.
