Trilithic

VF-4

Tunable Preselector Filter

VF-4

The VF-4 Tunable Preselector Filter allows you to improve the accuracy of your distortion tests by providing the preselector needed to accurately measure composite triple beat, cross modulation and other spurious signals in a working CATV system.

  • Improves measurement accuracy of distortion tests
  • Compatible with all spectrum analyzers and meters
  • 55–880 MHz operation
  • Extend the range and accuracy of fiber-optic measurements
  • Field portable

Eliminate input overload problems from your distortion tests.

T he Trilithic VF-4 Tunable Preselector re-selector Filter allows you to improve the accuracy of your distortion tests by providing the preselector needed to accurately measure composite triple beat, cross modulation and other spurious signals in a working CATV system.

A VF-4 filter blocks illegitimate signals – which spectrum analyzers and signal level meters can generate because of input overload – and passes only the carrier to be analyzed to the instrument's input. As a result, a VF-4 can improve an instrument's reliable measurement range by as much as 30 dB.

Specifications

Frequency Range

Frequency Range 55-880 MHz in four bands
Shape Factor (30 dB BW / 3 dB BW) = 2.2 / 1 maximum
Insertion Loss 1.5-3.5 dB, depending on band
In-channel VSWR 1.5:1, maximum

AM-1000 Preamplifier:

Frequency Range 50-1000 MHz
Nominal Gain
20 dB @ 600 MHz
17 dB @ 750 MHz
16 dB @ 1000 MHz
Impedance 75 Ohms, nominal
Noise Figure 5 dB
Power Internal NiCad battery, 4 hours operation per charge

 

 

Upgrades

  • VF-4 Hard Case

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    Hard case replacement for the VF-4.

Accessories

  • VF-4 Carrying Case (CC-11)

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    Padded carrying case for the VF-4.

  • AM-1000 Preamplifier

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    75 Ohm, 20 dB Preamplifier, Battery operated. Installed in lid of VF-series filters.

  • AM-1000/Tricorder Battery

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    NiCAD battery for the AM-1000 Pre-Amplifier used in VF-4 & VF-5 Portable Pre-Selectors and the Tricorder.

  • AM-1000RC Preamplifier

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    AM-1000 retrofit kit for existing VF-series filter banks. Includes new VF-4 case and AM-1000.

  • AM-1000 Bench Type Preamplifier

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    20 dB preamplifier, bench-type, 75 Ohm. Stand alone Unit.

  • 75 Ohm BNC Female Connector

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  • 75 Ohm F Female Connector

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  • T7-T12 Filters (In Benchtop Enclosure)

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    Fixed frequency T7 through T12 channel filters.

Related Items

  • DCVF-5 Automated Preselector Filter

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    Automated forward and return pre-selection. GPIB and front panel user controls. Switchable T7-T13 channel filters, tunable from 55 - 880 MHz, integrated 20 dB preamplifier and switchable aux signal ports for special testing requirements.

Warranty

Repairs

All repairs carry a 90-day warranty against defects in replacement parts and repair workmanship.

Products

All Trilithic products are warranted against defects in materials or workmanship for a minimum of one year after shipment.

Trilithic's obligation under this warranty is limited to the repair or replacement of the product after being returned to our factory, and Trilithic determining the product be indeed defective.

This is Trilithic's sole warranty and is given in lieu of all other warranties, expressed or implied, including warranties of merchantability or fitness for a particular purpose and sets forth the buyers sole remedy.

The following products carry a Manufacturers One Year Warranty

8821Q, 8821Q-R & 8853Q Rotary & Benchtop Attenuators TFS-3200 Series
APSS-1B TFS-201 TFS-FS1
DCVF-5 TFS-290 Series TFS-FS1K500 Series
Impedance Matching Pads TFS-301 TLB-60
I-Stop TFS-401 Tunable Filters
Programmable RF Switches TFS-2000 Series VF-4 & VF-5

The following products carry a Manufacturers Two Year Warranty

860 DSP & 860 DSPi 9581 SST R3 & 9581 SST R4 RSVP²
860 DSPh & Input Expander 9581 TPX Seeker Lite²
860 DSPr CT-2/ CT-3 Seeker
8300 FST Model Two Seeker MCA
8310 RSA Model Three Seeker BB-2

The following products carry a Dell Three Year Warranty

All Specially Configured Dell PowerEdge 2U Rack Mount Server products are warranted against defects in materials or workmanship for a minimum of three years after shipment. Dell provides next business day, parts and labor, on-site response for the following Trilithic products.

ADIA Integrated Server Package LAW Server Package
Guardian II Integrated Server Package Trilithic Data Manager (TDM) Integrated Server Package

 

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