ENA-X and ENA Series Vector Network Analyzers.pdf - 第24页

24 For calibration, a standard mechanical cal kit or ECal module is required for t he S - parameter portion of the cal (an ECal used as a tuner c annot be shared for calibr ation). To calibrate a standa rd receiver for n…

Add Mechanical Noise Tuner Control for Noise

Figure/Parameter Measurements (S96027B)

Noise figure measurements using application software S96029B utilize an ECal module as an impedance

tuner to provide source- corrected noise figure and noise parameter measurements of nominally matched

devices, with gamma-opts < 0.3. To measure noise parameters of unmatched devices with higher

gamma- opts, an external tuner is needed. This application software enables control of Maury Microwave

LXI tuners or Focus Microwaves’ CCMT tuners in place of an ECal module, extending noise parameter

measurements to devices with gamma-opts < 0.9. Requires application software S96029B. Refer to

Maury Microwave’s or Focus Microwaves’ websites for more information about compatible tuners.

Noise Figure Measurements with Vector Correction

(S96029B) using E5080B ENA

This software application enables high-accuracy noise figure and noise-power measurements of

amplifiers, frequency converters, and mixers, utilizing Keysight’s unique vector-source-correction

technique that uses Keysight N469xD series ECal module as a source-impedance tuner

to remove the

effects of imperfect system-source match. This approach yields accuracy that surpasses that provided by

the Y-factor method and other cold-source implementations, especially for in-fixture, on-wafer, and

automated-test environments. S96029B controls N469xD Series ECal modules configured as impedance

tuners for use with the E5080B ENA.

A scalar-calibrated method is also available that offers less accuracy but is faster and does not require an

impedance tuner. This method requires an external switch to isolate the E5080B’s source signal during

noise figure measurements. A 50-ohm load must be connected to the DUT’s input using the switch.

The analyzer’s standard receivers are used for noise figure measurements with the S96029B. An external

preamplifier, filter(s) and switches are required for devices with < 30 dB of excess noise (gain plus noise

figure in dB). Typical block diagrams of scalar-calibrated (left) and vector-calibrated (right) noise figure

measurements are shown.

1. 8509x, N443x or N755xA Series ECal modules are not supported.

For calibration, a standard mechanical cal kit or ECal module is required for the S-parameter portion of

the cal (an ECal used as a tuner cannot be shared for calibration). To calibrate a standard receiver for

noise figure measurements, a power meter/sensor is required. A 346-serires noise source (Keysight 346C

or 346C-K01 recommended) can be used for noise calibration of the instrument’s receiver when a

preamplifier is located before the receiver. All calibration accessories and external hardware must be

ordered separately.

Noise figure measurements with the E5080B are not supported below 50 MHz or above 45 GHz.

Noise Figure Measurements with Vector Correction

(S96029B) using E5081A ENA-X

This software application enables high-accuracy noise figure and noise-power measurements of

amplifiers, frequency converters, and mixers, utilizing Keysight’s unique vector-source-correction

technique that uses Keysight N469xD series ECal module as a source-impedance tuner

to remove the

effects of imperfect system-source match. This approach yields accuracy that surpasses that provided by

the Y-factor method and other cold-source implementations, especially for in-fixture, on-wafer, and

automated-test environments. S96029B controls N469xD Series ECal modules configured as impedance

tuners for use with the E5081A ENA-X.

A scalar-calibrated method is also available that offers less accuracy but is faster and does not require an

impedance tuner. Unlike E5080B ENA, E5081A ENA-X does not require an external switch to isolate the

source signal during noise figure measurements.

If hardware options 0K1/0K2/0N1/0N2 are not ordered, then only the low and medium receiver gain

settings are available for noise figure measurements. These settings are suitable for devices with gain +

noise figure is > 30 dB. If the hardware options are ordered, in addition to the low and medium gain

settings, the high gain setting is enabled. This makes the noise figure capability suitable for a wider range

of devices. Hardware Options 0K1/0K2/0N1/0N2 are highly recommended if the instrument is to be used

for noise figure characterization.

All E5081A (with and without Option 0K1/0K2/0N1/0N2) include the necessary filters to eliminate out-of-

band noise conversion up to 40 GHz on ports 1 and 2. Below 160 MHz or above 40 GHz, an external

bandpass filter may be required for noise figure measurements.

Typical block diagrams of scalar-corrected (left) vector-corrected (right) noise figure measurements with

ENA-X are shown.

For calibration, a standard mechanical cal kit or ECal module is required for the S-parameter portion of

the cal (an ECal used as a tuner cannot be shared for calibration). To calibrate a standard receiver for

noise figure measurements, a power meter/sensor is required. A 346-serires noise source (Keysight 346C

or 346C-K01 recommended) can be used for noise calibration of the instrument’s receiver.

Noise figure measurements with the E5081A are not supported below 50 MHz.

1. 8509x, N443x or N755xA Series ECal modules are not supported.