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The Intelligent Tuner
Focus' latest line of tuners feature a completely re-designed control electronics based on a powerful real-time microprocessor capable of controlling up to six motors simultaneously.		 Featured Product
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Multi-Purpose Wideband Harmonic Tuner:
Using three independent RF probes, the MPT synthesizes several million impedances at the fundamental and harmonic frequencies. This
allows independent harmonic tuning, high VSWR prematching and most other crucial tuner features,
all in a single unit... Ask for Product note 79.
　
Load Pull measurement system

A Load Pull system is used to measure the dependence of physical characteristics (DC, RF, Temperature or other) as a function of preselected RF impedances (or reflection factors). This way of testing the DUT is called "load pull" (or source pull). DUTs include transistors, amplifiers, diodes, mixers, oscillators etc.. A typical Load Pull Setup (LPS) includes setup hardware, measurement instruments, a PC and measurement software.

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[Available CCMT and Harmonic Tuners]


Typical Load Pull Setup using Focus Fundamental and Harmonic Tuners

Focus supplied Components of a Load Pull and Noise Measurement System (2 tuners, controller, GPIB, Hardkey, software [floppies or CD-ROM], cables and manual). This system can be run from any PC.
Programmable Coaxial Tuner, model CCMT-1808 (0.8 to 18 GHz)
with APC7-connectors

Manual Microwave Tuners, MMT (with Harmonic Tuning Capability) for frequencies between 0.4 and 50 GHz !!

Manual Microwave Tuners are designed for critical RF impedance matching operations, like Load Pull and Noise measurements. MMTs use parallel plate airlines (slablines) and one or two sliding carriages with one vertical micrometer screw and a microwave probe (slug) each. The microwave probes and slablines are designed to generate high reflection factors over a very wide frequency band (such as 0.8 to 18 GHz with typical VSWR of 20:1). The two independently adjustable carriages allow mutual prematching of the probes and thus selectively extremely high VSWR (greater than 50:1). The sliding mechanism and the probe layout ensure long lasting operation, high reproducibility and insensitivity to vibrations. Manual Microwave Tuners are manufactured for frequencies from 400 MHz to 50 GHz, using a variety of connector types. When one of the two wideband probes is replaced by a resonant head(1) the manual tuners can be used for independent tuning of the harmonic impedance at 2fo with very high VSWR (>30:1).

Manual Microwave Tuner, model MMT-1808 (0.8 to 18 GHz)
Manual Microwave Tuner (MMT) at a glance:
  • Frequency Range (different models): 0.4 to 50.0 GHz
  • VSWR Tuning Range (wideband) 1.04:1 to 20:1
  • Phase Tuning Range 0 to 360 degrees
  • Instantaneous Bandwidth up to 5 octaves
  • Prematching capability (narrow band) for VSWR 50:1
  • Insertion Loss (frequency dependent): 0.1 to 0.9 dB
  • Connector types: APC-7, 3.5, 2.9, 2.4, N, SMA
  • Option: Independent Harmonic Tuning

Manual Microwave Tuner, model MMT-4005 (5.0 to 40 GHz)