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Chapter 4 Command Reference

[:SENSe] Subsystem

4-88 Programming Guide

[:SENSe]:FREQuency:EXPected[1|2|3]

<numeric_value> [HZ]

Sets or queries the approximate frequency of a signal you expect to measure.

Providing this value enables the Counter to eliminate a

pre-measurement step, saving measurement time and enabling more accurate

arming. This applies to the following measurement functions: Frequency, Period,

Ratio, Phase, and Duty Cycle.

Note that the actual frequency of the input signal must be within

10 % of the expected frequency value you entered.

• For channels 1 and 2, the frequency range is 0.1 to 225E6 HZ

• For channel 3 (Option 030), the frequency range is 100E6 to 3E9 HZ

• For channel 3 (Option 050), the frequency range is 200E6 to 5E9 HZ

• Numeric data transferred as ASCII bytes in <NR3> format with fifteen

significant digits.

• If [:SENS]:FREQ:EXP[1|2|3]:AUTO is ON, Not a Number 9.91E37 is

returned and error -221 is generated.

This value is unaffected by save/recall.

[:SENSe]:FREQuency:EXPected[1|2|3]:AUTO ON

The command, which only allows the ON parameter, configures the Counter to

perform, as necessary, a pre-measurement step to automatically determine the

approximate frequency of the measurement signal(s). This applies to the following

measurement functions: Frequency, Period, Ratio, Phase, and Duty Cycle.

The query indicates whether or not the above described

pre-measurement step is enabled.

• Single ASCII-encoded byte, 0 or 1.

• A value of 0 indicates OFF; a value of 1 indicates ON.

<numeric_value>

Range

Query Response

Comments

Query Response

1 2 ... 249 250 251 252 253 254 255 256 257 258 259 ... 329 330

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HP 132A Instrukcja Użytkownika Strona 254