User`s guide

84 53220A/53230A User’s Guide
3 53220A/53230A Measurements
expected (Ch3/Ch1, Ch3/Ch2 - Option 106): 0.28 to 6.0E10
expected (Ch3/Ch1, Ch3/Ch2 - Option 115): 0.85 to 15.0E10
resolution (all channels): 1.0E-15 * expected to 1.0E-5* expected
(default resolution corresponds to a 0.1s gate time)
- channel_pair settings are (@1),(@2)|(@2),(@1)|(@1),(@3)|
(@3),(@1)|(@2),(@3)|(@3),(@2). Within the pair, the first channel rep-
resents the ratio’s numerator and the second channel represents the ratio’s
denominator. The default channel_pair is (@1),(@2).
Frequency Ratio Examples
// using MEASure? - ratio measurement expecting a 1:1
// ratio, set 6 digits of resolution of ratio measurement
*RST // reset to start from known state
MEAS:FREQ:RAT? 1, 1.0E-6, (@1),(@2)
-------------------------------------------------------
// using CONFigure - ratio measurement expecting a 1:1
// ratio, set 9 digits of ratio resolution
*RST // reset to start from known state
CONF:FREQ:RAT 1, 1.0E-9, (@1),(@2)
INP:LEV 1.5 // set a 1.5V threshold level (ch. 1)
INP2:LEV 1.5 // set a 1.5V threshold level (ch. 2)
READ?
Notes
1. The digits of resolution in the above ratio measurements is set by the resolu-
tion parameter (1.0E-6, 1.0E-9). In effect, the exponent corresponds to the
number of digits. See “Frequency Measurements” in Chapter 5 for information
on the relationship between gate time and reading resolution.
2. See Chapter 4 for additional information on counter threshold levels and on
configuring the input signal path.