Voltage-to-Frequency Converters Specifications

Help with Voltage-to-Frequency Converters specifications:

Device Specifications

	Analog Input Channels:		This is the maximum number of analog channel inputs. The single-ended number is specified when single-ended inputs are available as twice the number of differential inputs. Differential channels use the difference between two signals as an input; common mode is filtered out. In some systems, differential inputs are combinations of two single-ended inputs. When this is the case, twice the number of differential channels are available as single-ended inputs.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.
	Differential Channels		Differential channels have two inputs. The signal to process is the voltage (V) difference between the two inputs. For example, if one reading is 4.93 V and the other reading is 5.16 V, the meaningful value is the 0.23 V difference between the two. Often, this applies to precision measurements where the difference between two low-voltage inputs is small but critical.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Maximum Output		This is the limit of output voltage.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.
	Bandwidth		Bandwidth is the difference between the high and low limits of the frequency response, typically defined by a variation from a nominal value by a stated value such as 3 dB.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.
	Accuracy		Accuracy depends on the signal conditioning linearity, hysteresis, temperature considerations, etc. It is represented here as percent full scale of measurement range.
	Search Logic:		All matching products will have a value less than or equal to the specified value.
	Signal Isolator		Signal isolation is the separation of any direct electrical contact of a signal. This can be done in various ways, including optical isolation, capacitors, and magnetic induction.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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Signal Inputs

	DC Voltage Input
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	AC Voltage Input?
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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Outputs

	Voltage Output?		Variable voltage outputs such as 0-10V, ±5V, etc.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Current Output?		Variable current level outputs such as 0-20mA, 4-20 mA current loop, etc.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Frequency Output?		The output is a frequency or pulse signal such as amplitude modulation (AM), frequency modulation (FM), or pulse width modulation (PWM) or control.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Timer / Counter Output?		The output is a counting or timing of measured events.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Relay Output?		With switch-type outputs, the contacts are open or closed depending on the state of one or more of the inputs.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Other Output?		Other unlisted or specialized outputs.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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Filter Specifications

	Low Pass Cutoff Frequency		The low pass cutoff frequency is the nominal frequency below which the input signal is passed and above which the signal is blocked.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Integral Filter?		Integral filters allow certain signal frequencies to pass while attenuating others. These filters can also operate on signal phase.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Programmable Filter?		Filter parameters such as cutoff frequencies may be interactively programmed by the user.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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Form Factor

	Form Factor
	Your choices are...
	Printed Circuit Board (PCB)		Devices are printed circuit boards (PCBs) that attach to enclosures or plug directly into computer backplanes.
	Panel / Chassis Mount		Devices attach to a panel or bolt onto a chassis.
	Modular Bay / Slot System		Devices stack in modular bays or slots, and can be interfaced to other units.
	Rack Mount		Devices are rack-mounted and fit inside enclosures such as a standard 19 in. telecommunications rack.
	DIN Rail		Devices mount on a standard DIN rail. DIN is an acronym for Deutsches Institut für Normung (DIN), a German national organization for standardization.
	Stand Alone		Devices are benchtop or floor-standing units with a full casing or cabinet, and an integral interface.
	Other		Other unlisted form factors.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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User Interface

	User Interface
	Your choices are...
	None		There is no user input or programmability. Instead, there is "black box" style of storage for download or processing elsewhere.
	Front Panel and Display		There are integral controls, a keypad, and/or a display on the panel of the unit.
	Touch Screen		The device's visual display screen is contact-sensitive to allow direct input.
	Hand-held / Remote Programmer		The interface unit is designed specifically to be held in the hand while the user enters program parameters, and may include remote programming.
	Computer Programmable		The device is interfaced to a separate supervisory or host computer.
	Other		Other unlisted user interface methods.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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