AMS band 4/5 U-link 1 5/8" USL-D IL2 product photo Front View L
For a larger view click on the picture.

AMS band 4/5 U-link 1 5/8" USL-D IL2


SPINNER Antenna Monitoring System - protect your broadcast infrastructure

All over the world radio and television broadcasters rely on their transmission systems operating unfailing around the clock, including patch panels, feeder cables and dipoles. The infrastructure itself is generally robust, but in the long run can be damaged and disturbed sustainable through RF overloads, incorrect installation or environmental influences (e.g.: UV radiation, ice, strong wind).

SPINNER's Antenna Monitoring System (AMS) was developed to detect and pinpoint potential malfunction sources, like minimal arcing, compromised insulation or water ingress as early as possible. Thus, the whole broadcast transmission system can be prevented from greater damages, for example degraded RF-components, fire or even a complete off-air situation. All conspicuous events are continuously and reliable recorded in the AMS control unit and can be checked from anywhere via a user-friendly web interface, which also can be used to easily configurate the AMS system setup. A detected failure triggers an alarm both locally on warning LEDs and remotely via a SNMP (Simple Network Management Protocol) interface.

All AMS system components are engineered for indoor installation and can be integrated simple and fast, even in already existing broadcast sites.

The AMS band 4/5 U-link 1 5/8" USL-D IL2 ensures optimal performance for signal transmission between transmitter and antenna in broadcast stations.

This U-Link (for SPINNER patch panels) provides an AMS detector. It is responsible for detecting arcing and water ingress. Minimum one AMS detector is required for each antenna line.

Outstanding RF characteristics, best possible passive intermodulation and VSWR

The AMS band 4/5 U-link 1 5/8" USL-D IL2 enables you to transmit high-frequency signals reliably and flawlessly with optimum protection of your sensitive equipment in a power range up to 7 kW @ 800 MHz.

The protection class is IP 50.

It supports the use of the following frequency bands : Band 4/5

The positive characteristics are briefly summarised: AMS Detector, to be mounted on SPINNER Patch Panels.

Benefits of the AMS

  • Distance-to-fault detection
  • Arcing detection
  • Water ingress detection
  • Continuous monitoring of the whole system
  • Local signaling by LEDs and status relays
  • Remote signaling via SNMP and web interface
  • Protection by integrating transmitter into interlock loop
  • No signal distortion
  • Compact design
  • Fast, easy installation
  • All components indoors
  • No invasive changes to the system
  • Suitable for pressurized lines
  • Works for antennas of any height

RF characteristics

Number of interfaces:
Interface type:
1 5/8" USL-D (50 Ω) per company standard 61790
Interlock type:
Waveguide component type:
U-Link with interlock
Frequency range:
470 to 800 MHz
Frequency band:
Band 4/5
Average power rating:
7 kW @ 800 MHz
Proof voltage rating:
10 kV
VSWR, max.:

Electrical characteristics

Connection to control unit:
D-SUB 15 female

Mechanical characteristics

Degree of protection:
IP 50
Weight, approx.:
2.5 kg
295.0 mm
105.0 mm
190.0 mm

Environmental conditions

Operational conditions:
ETSI EN 300 019-4-3 V2.3.2 (2009-1) class 3.1 N
Operating temperature:
-10 to +45 °C
Relative humidity, max.:
95% (condensation not allowed)
Transport conditions:
ETSI EN 300 019-1-2 V2.1.4 (2009-1) class 2.2
Transport temperature range:
-25 to +70 °C
Transport rain, condensation, icing:
not allowed
Storage conditions:
ETSI EN 300 019-1-1 V2.1.4 (2009-1) class 1.2
Storage ambient temperature:
-10 to +45 °C
Storage rain, condensation, icing:
not allowed

Further remarks

AMS Detector, to be mounted on SPINNER Patch Panels
for the derating of RF power and voltage with increasing altitude see "Environmental Conditions for Broadcast Products" TD-00060
Customs tariff number:



Product data sheet – 555405 – 555000-DS.pdf