Switchable auxiliary ports for special requirements
Automatically block unneeded signals for fast, accurate network performance testing.
The Trilithic DCVF-5 Automated Preselector Filter is designed for quick, accurate and repeatable measurements of composite triple beat, cross modulation and other spurious signals that can affect CATV system network performance.
Placed between a test instrument and the CATV system test point, the DCVF-5 blocks all unneeded signals, passing only the carrier or spectrum to be analyzed to the instrument's input. By eliminating input overload, the filter can improve an instrument's reliable measurement range as much as 30 dB.
The DCVF-5 can also be used to extend the range and accuracy of fiber optic measurements. Custom filter designs are available for specialized testing requirements.
Specifications
Mechanical
User Interface
GPIB and Manual Entry
Input Impedance
75 Ohms
Output Impedance
75 Ohms
RF Connectors
BNC Female
Frequency Range
8.75 to 880 MHz
AUX Ports Bandwidth
DC – 1,000 MHz (Internal Amplifier Bypassed)
Internal Thru Port Bandiwdth
DC – 1,000 MHz (Internal Amplifier Bypassed)
Return Loss
14 dB Minimum to 880 MHz
Insertion Loss
11.5 dB Maximum @ 880 MHz
Fixed Bandpass Filters
T-7 through T-13 Channels
Variable Bandpass Filters
55 through 880 MHz in 4 Tunable Sections
Filter Shape Factor
30:3 dB = 2.2:1; 50:3 dB = 3.5:1
Selectivity
6 MHz Nominal
RF Input Power
0.5 Watts Average
Path Switch Type
Electro-Mechanical
Path Switching Time
Less than 100 Milliseconds after GPIB Command
Path Switch Life
Greater than 1 Million Operations
Fixed Filter Tuning
Switched Port Selection
Variable Filter Tuning
Stepper Motor with Optical Encoder
Tuning Acquisition Time
Typically Under 20 Seconds
Post Amplifier Gain
20 dB @ 50-600 MHz; 17dB @ 750 MHz; 16 dB @ 1,000 Mhz
Post Amplifier Passband
50 MHz – 1,000 MHz
Post Amplifier NF
5 dB
AC Power Input
95 – 240 VAC, 50/60 Hz, Single Phase
Power Consumption
100 Watts
Dimensions
17”W x 10.5”H x 20”D (Standard 19” Rack Mounting)
Weight
45 Lbx. (20 Kg.)
Physical
The front panel is a black anodized finish on brushed aluminum. The remaining enclosure is straw chromate finish on aluminum
