The 4046E Receive Antenna Monitor is an Ethernet-based RF sensor for continuous, in-line receive-path monitoring.
It performs scheduled return loss measurements and provides SNMP alarms to detect antenna and feedline degradation early without disrupting service.

• Return Loss Monitoring: Scheduled, in-line return loss measurements detect antenna/feedline degradation over time.
• Interference Detection (RSSI): Standby-mode RSSI scans identify strong in-band interferers; user-set thresholds trigger WebUI/SNMP alarms.
• Clear, Actionable Data: Reports real-time results and alarms for quick detection of receive-path issues before performance is affected.
• Remote Access and Alarm Management: Integrates with SNMP v2c/ v3 and a built-in web interface for remote setup and centralized alarm handling-no site visit required.
• Flexible Deployment: User-defined frequency lists, schedules, and thresholds adapt to site needs, with remote updates for easy adjustments.

SENSOR CHARACTERISTICS
• Measurement Type : In-Line, switched reflectometer, single or swept frequency
• Frequency Range: 101 MHz to 1000 MHz
• Return Loss, Measurement Range : -26 dB to 0 dB
• Test Signal Output(to antenna): -10 dBm, nominal
• Test Signal Leakage(to radio): -30 dBm, max
• Measurement Duration: 250ms per measurement frequency, max.
• Test Signal Application Interval: User selectable, time window
• Impedance, Nominal : 50 Ohms
• Insertion Loss, Max : 0.7 dB, max
• Insertion VSWR : 1.3:1, typical
• Input power limit for the signal path: Max: 36 dBm (4W) @ VSWR 1:1
MEASUREMENT CHARACTERISTICS
• RSSI, max Signal Level: -10 dBm
INTERFERING SIGNAL DETECTOR
• Max. Signal Level : -10 dBm
• Frequency Range : 101 MHz to 1000 MHz
• RSSI, Measurement Bandwidth : 25 kHz
• RSSI Interference Detection Threshold Level: User selectable from -55 dBm to -35 dBm
SYSTEM
• Power Supply: 5.5-25 VDC, 3.5 W max, 0.08 in (2 mm) power input. 15V AC adapter included
• Indication: Via WebUI display and via SNMP trap
CONNECTORS
• Interface: Ethernet 10/100BASE-T (auto-sense) IEEE 802.3
• RF Connectors: N(f ), N(m)