The PSM1700 and PSM1735 feature ground referenced generators, as a result there is a requirement to isolate the injected perturbation signal from ground so that the feedback loop is not shorted to the ground plane.  This action is performed by an injection transformer and N4L have designed numerous injection transformers to meet a range of frequencies and voltages.

The N4L Impedance Analyzer range offers high accuracy, high frequency LCR measurement. To accompany the IAI and IAI2 we have developed an IAI Kelvin Fixture. This fixture features four contact plates providing true four wire impedance measurement.

The TTF35 ecom Test Fixture is designed to be used in conjunction with the PSM range of frequency response analyzers. The TTF35 provides simple, fast and accurate measurement of ADSL and VDSL ecom filters.

The PSM2 Power Meter Adaptor is an isolation and attenuation accessory designed for use with the PSM1700, PSM1735 and PSM3750 Phase Sensitive Multimeters. This adaptor utilises toroidal transformers and calibrated burden resistors. The PSM2 provides isolation and fixed scaling factors enabling the PSM series frequency response analyzers to perform input power measurements on single phase low voltage power devices.

If external current measurement is necessary for impedance measurement, for example if a test setup utilising an LPA Laboratory Power Amplifier for signal generation is employed. The HF series shunts provide an accurate current sensing solution for many wideband measurement applications up to 20Arms. Utilising an innovative design that is unique to N4L, each shunt will maintain its specified resistance over a frequency range from DC to 1MHz without exhibiting the phase shift normally associated with resistive shunts.

Other models available upon request

As an alternative to selecting an HFm current shunt for external current measurement in impedance applications is our AC Current Clamp range. These clamps provide current measurement up to 3,000A (P32-UE) with an upper bandwidth of 15kHz (SMUB), providing accurate measurement of an AC signal over a wide bandwidth. Typical applications include impedance measurement of electrochemical cells where high DC current bias is present, the AC responding current clamp will reject the DC bias current and reliable accurate measurement of the AC perturbation current is recorded.

Other models available upon request

For High voltage applications, we recommend the PSM3750 frequency response analyzer, for voltages above this level an attenuator is required and the TT-HV-250 provides measurement up to 2.5kV.

Other models available upon request

The TTV-HVP-15HF High Voltage Probe provides 1000:1 attenuation of voltages up to 15kV, with a bandwidth of 50MHz these probes provide high voltage accurate measurement. For connection advice please contact the N4L application engineering department.

Other models available upon request

The ULCP ultra low capacitance probe is intended for voltage measurement of devices which are particularly sensitive to capacitive loading. This is particularly useful when measuring start up characteristics of low power lighting ballasts, the ULCP Ultra Low Capacitance Probe utilises a differential input design that provides a capacitance to ground of 1pF.

Other models available upon request

V & A lead set offered as standard with our power analyzer range, the N4L 20/36A lead set provides the engineer with 4 connection leads provide convenient connection of the frequency response analyser to a test device via the means of conventional crocodile clips.

Other lead lengths available upon request

The PSM1700 rack mount kit provides a convenient, neat method of integrating the PSM1700/PSM1735 Frequency Response Analyzers into a 19in rack. The rack mount kit consists of a framing plate.

The PSM3750 rack mount kit consists of two 19in rack mounting brackets providing simple integration into any EIA standard 19in rack system. The brackets are fitted to the Frequency Response Analyzer by removing the two handle fixtures situated on each side of the instrument.

The ATT10, ATT20 and ATT1000 are BNC to BNC voltage attenuators designed for the PSM BNC inputs. They provide high accuracy wide bandwidth gain, typical applications are in situations when the output of a voltage attenuator (such as the TT-HV250) is above the 10Vpk range of the PSM1735 input.