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Support for the 85054 N calibration and verification kit.

Inside Kirkby Microwave type-N  calibration kit


This page describes the 85054 kit in detail. Other pages on our site show how to set up calibration kits for various VNAs. Unless you know how to set up a calibration kit, you will need to read both sections to familiarize yourself with this kit, and also how to set it up.

  1. Introduction.
  2. Frequency range.
  3. Supported instruments. Virtually all VNAs can be made to work with the 85054. Some VNAs, such as those from HP. Agilent, Keysight, Copper Mountain and LA Techniques can be easily configured to work with the 85054 kit. Some Rohde & Schwarz VNAs are easily configured, other less so. Full details are given below.
  4. Identifying components of the kit. It may not be obvious what each part is, so here you will find out.
  5. Calibration kit coefficients.
  6. Configuring the VNA to use the calibration kit.
  7. Calibration. How to calibrate your VNA.
  8. Verification. - How to verify the VNA is correctly configured to use the N calibration kit.

1. Introduction.

The kit is particularly popular with

2. Frequency Range

The frequency range of the 85054 type-N calibration and verification kit is DC-18 GHz. However, new loads suitable for use to 18 GHz are very expensive, which makes producing a kit at an economic price impossible. So most kits are sold with loads suitable for use to 6 GHz - the opens and shorts are still usable to 18 GHz. Please advise us if you need frequencies above 6 GHz, as we may be able to supply suitable loads. The photograph below shows a kit with 6 GHz loads. This is by far the most popular version of the kit we sell.

6 GHz version of the type-N kit

We can sometimes supply the kit with 18 GHz load - typically the HP 909F. These looks somewhat different

18 GHz loads

3. Supported Instruments.

VNAs manufactured by the following companies are fully supported.

We may be able to support other makes, such as Advantest, but we would need to be made aware of the model number first, to allow us to research this.

It is necessary to load the coefficients of the kit into the VNA. The coefficients of the kit will be supplied with the kit - if you have lost them, or purchased a used kit, please contact us, stating the serial number, and we will advise you of the coefficients.

4. Identifying the components.

It should be obvious what the following parts are:

5. Coefficients of the calibration kit

Since late 2017, each kit has been supplied with individual data for that kit, which is put on the USB stick. Kits sold prior to this have generic coefficients. If you are unsure of the coefficients of your kit, please provide us the serial number and the frequency range over which the kit is to be used, as the coefficients can be optimised for use at lower frequencies, if one is not using the kit to 18 GHz.

6. Configuring the VNA to use the calibration kit.

7. Calibration of the VNA

How you calibrate the VNA depends on the particular VNA. You will need to read the manual, although we can explain the procedure on some VNAs. We have web pages set up to describe how to use calibration kits with a number of different VNAs.

Copper Mountain (1-port and transmission/reflection)
Copper Mountain (Full 2-port & 4-port)
HP 8714
HP/Agilent 8753
HP/Agilent 8719, 8720 & 8722
HP/Agilent 8510
Agilent/Keysight PNA
Agilent/Keysight PNA-X
Agilent/Keysight FieldFox
Agilent/Keysight ENA
LA Techniques
Rohde & Schwarz

8. How to verify the VNA is correctly configured to use the N calibration kit

Once the VNA is set up to use the 85054 calibration and verification kit, it is tempting to start making measurements. However, it is wise to verify that that the kit is correctly configured, and the VNA giving sensible results. Our kits include a serial numbered attenuator


which has been measured using an Agilent 85054B calibration kit. The results of the measurements are stored on a USB stick included with the kit. We have a page about verification in our FAQ, so please read that.

Kirkby Microwave Ltd is registered in England and Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT.