Model 1255B Frequency Response Analyzer

The model 1255B Frequency Response Analyzer is one of a range of instruments that will meet your needs today and in the future.

Using the single sine technique the 1255B provides precise measurement of gain and phase between any two points in a system. This fully digital technique is used to assess the performance of both simple and complex systems - mechanical, electronic and electrochemical. For over 30 years Solartron Analytical have produced frequency response analyzers, instruments which are regarded throughout the world as industry standards. This unsurpassed knowledge and experience has been used to produce the 1255B, with its 1 MHz frequency range and 1 in 65 million frequency resolution.

The 1255B Frequency Response Analyzer applies the power and sophistication of modern measurement technology; simple in concept, fast and precise in performance, and so easy to use, even by non-technical personnel. The 1255B Frequency Response Analyzer’s key features include:-

Electrochemistry
Measurement of impedance has become an important tool in the study of electrochemical/biological phenomena and material properties.

The 1255B together with a potentiostat such as the model 1287A, can be used in a wide range of applications, including:-

Materials Testing
When combined with a 1296 Dielectric Interface and temperature test equipment the 1255B can be used to test a wide range of materials, such as:-

Electronic Testing
The model 1255B is ideally suited to a wide variety of applications in the field of electronics - from fundamental aspects, such as the characterization of the electrical and mechanical properties of materials, to the development and testing of components and complete circuits.

Generally these applications require the measurement of transfer functions and group delay over a wide frequency range. In the case of filters, a wide dynamic range coupled with high frequency resolution are also needed to enable the attenuation characteristics to be full defined.

Consider the model 1255A if manual operation is required or for frequencies up to 20 MHz.

Generator
	AC Amplitude	0 to 3 V rms
	Maximum AC resolution	5 mV
	DC Bias Range	±40.95 V
	Maximum DC resolution	10 mV
	Output impedance	50 Ω±1%
	Max output current	±100 mA peak
	Frequency range	10 µHz to 1 MHz
	Max resolution	10 µHz
	Error:	±100 ppm
	Stability	24 hrs ±1ºC
		±10 ppm
	Sweep types	Frequency (logarithmic or linear)
		Amplitude (linear)
		DC bias (linear)
	Resolution
	frequency	>10000 points
	amplitude	>200 points
	Maximum voltage hi to lo	±46 V peak
	Maximum voltage lo to ground	±0.4 V peak
	Maximum current	±100 mA peak
	Impedance lo to ground	100 Ω, <10 nF
	Connector	Single BNC, floating shield
	Protection	Output is short-circuit protected
Analyzers
Two independent analyzers operating in parallel
	Range	Dynamic range	FS Peak Input	Common Mode Rejection
	30 mV	1 µV (90 dB)	45 mV	5 V
	300 mV	10 µV (90 dB)	500 mV	5 V
	3 V	100 µV (90 dB)	5 V	5 V
	Inputs protected to	±46 V
	Connections	single/differential BNC
	Shields	floating/grounded
	Coupling	DC or AC (-3 dB at 1 Hz)
	Input impedance hi to shield	1 MΩ, <35 pF
	Input impedance shield to ground	10 kΩ, 330 pF
	Cross-channel isolation @ 1 MHz	>100dB
	Integration time	0.01 s to 10⁵ s, or auto
	Measurement delay	0 to 10⁵s
	Limits of error	Ambient temperature 20±10ºC, integration time >200 ms. Data valid for one year after calibration. Gain-phase measurements Applies to all ranges at >10% full scale
Calculated Results (available via computer interface)
	Variable	Frequency, AC amplitude, DC bias
	Measured parameters	Voltage gain, phase, real, imaginary, Z, R, X, Y, G, B, V, I group delay, C, L, Q, D
Interfaces
	RS232 & GPIB (IEEE-488)	For instrument control
Power Requirements
	Voltage	90 to 126V, 198 to 252 VAC
	Frequency	48 to 65 Hz
	Power	< 230 VA
Dimensions
	Width	432 mm (17")
	Depth	573 mm (22.56 ")
	Height	176 mm (6.93")
Weight		18 kg (40 lbs)
Operating Temperature Range		0 to 50ºC (32 to 122ºF)