53210A Input Signal Conditioning
4
Keysight 53210A User’s Guide
119
ON
enables noise rejection, thus
increasing
hysteresis and
decreasing
sensitivity
by 50%. This setting should be used when noise is present in the signal
environment. However, if the threshold level is close to a peak amplitude (positive
or negative), a count will not occur if the signal does not cross both hysteresis
levels due to the increased hysteresis band.
OFF
disables noise rejection which
decreases
hysteresis and
increases
sensitivity.
CONFigure
and
MEASure
do not change the noise rejection setting. Following a
reset (
*RST
) or instrument preset (Preset), noise rejection is disabled (off).
Noise Rejection from Bandwidth Limiting
For input signals up to 100 kHz,
reducing the counter’s bandwidth from 350 MHz to 100 kHz (see “
”) also provides noise rejection. Additional noise
rejection for frequencies in this range is then obtained through
INPut:NREJection
ON
.
Noise Rejection Example
//period measurement of expected 10 MHz signal,
//use channel 1
CONF:PER 0.1E-6,.001,(@1)
INP:IMP 1.0E6
//set impedance to 1 Mohm
INP:RANG 50
//set range to 50
INP:COUP AC
//set AC coupling
INP:LEV 3
//set 3V threshold level (absolute)
INP:NREJ ON
//enable noise rejection
Threshold Slope
Содержание 53210A
Страница 1: ...Keysight 53210A 350 MHz RF Counter User s Guide ...
Страница 12: ...12 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 18: ...18 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 22: ...22 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 24: ...1 Preparation for Use 24 Keysight 53210A User s Guide Figure 1 1 The 53210A Universal Frequency Counter Timer ...
Страница 48: ...1 Preparation for Use 48 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 122: ...4 53210A Input Signal Conditioning 122 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 222: ...8 Instrument Status 222 Keysight 53210A User s Guide Figure 8 1 The 53210A Status System Instrument Locked Global Error ...
Страница 228: ...8 Instrument Status 228 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 240: ...A 53210A Error Messages 240 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 246: ...246 Keysight 53210A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...