VIAVI CT-X Fully Agile Digital Leakage Channel Tagger

1RU digital leakage channel tagger generating up to 4 chirp or dual-CW tagged carriers from 130 to 1220 MHz for Seeker leakage detectors.

Compatibility: Seeker X, Seeker D, and Seeker D Lite leakage detectors
Carrier Types: Chirp and dual CW digital leakage carriers
Tag Signatures (Chirp carrier): 4 unique signatures
Tag Signatures (Dual CW carrier): 8 unique signatures

Datasheet

Overview

The VIAVI CT-X is a frequency-agile digital leakage channel tagger installed in the cable headend. Used as a system with the VIAVI Seeker X leakage detectors, it is designed to increase leak detection sensitivity while rejecting false leaks.

The CT-X can generate up to four simultaneous tagged carriers that can be placed anywhere in the channel lineup between 130 and 1220 MHz. Its digital chirp tag is used together with the Seeker X detector to support driveout testing and find-and-fix work in the field.

In addition to the chirp tag, the CT-X generates Seeker D-compatible dual-CW tags, so a single transmitter can serve Seeker X, Seeker D and Seeker D Lite detectors. Unique tag signatures help identify which system is the source of a detected leak where several CATV systems operate in the same area (overbuilt situations).

Installation

The CT-X occupies 1RU of rack space and is installed near the combiner where RF signals reside in the headend. Setup is done from the push-button front panel or through the integrated web interface, which also allows remote administration.

Key Features

Digital chirp tag for leak detection with elimination of false detects
Full-band frequency agility from 130-1220 MHz for channel lineup flexibility
Up to 4 tags in a 1RU chassis
Non-interfering tag technology does not impact services
Integrated web interface for remote setup and administration
Seeker D-compatible dual-CW tags
Push-button front panel controls

Specifications

CT-X Operation Mode

Compatibility	Seeker X, Seeker D, and Seeker D Lite leakage detectors
Carrier Types	Chirp and dual CW digital leakage carriers
Tag Signatures (Chirp carrier)	4 unique signatures
Tag Signatures (Dual CW carrier)	8 unique signatures
Carrier Frequency	130–1220 MHz
Carrier Output Level	-10.00 to 35.00 dBmV, ±0.5 dB
Spurious Outputs	Typically -65 dBc below digital carrier Assuming typical setting of -30 dB below digital carrier power
Output Return Loss	> 12 dB from 50 to 1220 MHz

General Specifications

Output Impedance	75 Ω nominal
Controls	Front panel select and enter buttons and HTML web interface
Display	Two-line LCD, 16 characters per line
Communication	10/100/1000 Base-T Ethernet, SFP/SFP+ interface
Power (AC) TRI-LKG-CT-X	90 to 250 VAC, 47-60 Hz, 0.75 A Ordering table lists the AC model with a 120 to 264 VAC power supply
Power (DC) TRI-LKG-CT-X-48VDC	-40 to -59 VDC, 1.7 A
Size	1RU (1.75”) rack enclosure