CONFigure:PERiod
Syntax
CONFigure:PERiod [{<range>|MIN|MAX|DEF} [,{<resolution>|MIN|MAX|DEF}] , ] [(@<ch_list>)]
Description
First, this command resets all measurement parameters on the specified channels to their default values. Then, configures the channels for period measurements but does not initiate the scan. If you omit the optional <ch_list> parameter, this command applies to the internal DMM, independent of any channels or a scan list.
The CONFigure command does not place the instrument in the "wait-for-trigger" state. Use the INITiate or READ? command in conjunction with CONFigure to place the instrument in the "wait-for-trigger" state.
Used With:
34921A through 34925A Multiplexer Modules
Parameters
|
Name |
Type |
Range of Values |
Default Value |
|
<range> |
Numeric |
Expected period of the input signal in seconds, between 3.33 µs and 333.33 ms. |
3.33 µs |
|
<resolution> |
Numeric |
Desired resolution in seconds. |
Fixed at 6 |
|
<ch_list> |
Numeric |
One or more channels in the form (@sccc). |
If <ch_list> is omitted, this command applies to the internal DMM. |
Remarks
If you omit the optional <ch_list> parameter, the configuration applies to the internal DMM, independent of any channels or a scan list (any existing scan list is not redefined). An error is generated if the internal DMM is not installed or is disabled.
When you specify a range of channels with this command, any channels that are invalid will be ignored (no error will be generated) but the first and last channel in the range must be valid for the selected function. The Analog Bus relays (numbered s911, s912, s913, etc.) on the multiplexer and matrix modules are ignored if they are included in a range of channels. An error will be generated if an Analog Bus relay is specified as the first or last channel in a range of channels.
The <range> parameter is required only to specify the measurement resolution parameter. Therefore, it is not necessary to send a new command for each new period to be measured.
If the input signal is greater than can be measured on the selected range (manual ranging), the instrument gives an overload indication: "±OVLD" from the front panel or "±9.9E+37" from the remote interface.
For period measurements, the resolution is fixed at 6
½ digits. The only way to control the reading rate for period measurements is by changing the channel delay. The <resolution> parameter only affects the number of digits shown on the front panel. The *RST command will clear the scan list and set all measurement parameters to their factory settings. The Instrument Preset (SYSTem:PRESet command) will not clear the scan list; however, this command will clear reading memory and all stored statistical data.
Examples
The following program segment configures the instrument
for period measurements on channel 4 in slot 3. The READ? command places
the instrument in the "wait-for-trigger" state, scans the channel
once, and then sends the reading to reading memory and the instrument's
output buffer. The default range (autorange) and resolution (fixed at
6
CONF:PER
(@3004)
ROUT:SCAN (@3004)
READ? (@3004)
Typical Response: +1.32130000E-03
The following program segment configures the instrument for period measurements on channels 3 and 8 in slot 1. The INITiate command places the instrument in the "wait-for-trigger" state, scans the channels once, and stores the readings in memory. The FETCh? command transfers the readings from reading memory to the instrument's output buffer.
CONF:PER
1,0.001,(@1003,1008)
ROUT:SCAN (@1003,1008)
INIT
FETC?
Typical Response: +4.27150000E-04,+1.32130000E-04
The following program segment configures the internal
DMM for a period measurement (no <ch_list> is specified). The READ?
command places the internal DMM in the "wait-for-trigger" state,
initiates a trigger, and then sends the reading to reading memory and
the instrument's output buffer. The default range (autorange) and resolution
(fixed at 6
CONF:PER
!Applies
to the internal DMM
READ?
Typical Response: +2.93830000E-03