Agilent Technologies Signal Analyzer N9030a - Manual (Page 726)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Marker
Gate Time
Controls the length of time during which the frequency counter measures the signal frequency.
Longer gate times allow for greater averaging of signals whose frequency is “noisy”, though the
measurement takes longer. If the gate time is an integer multiple of the length of a power-line cycle
(20 ms for 50 Hz power, 16.67 ms for 60 Hz power), the counter rejects incidental modulation at
the power line rate. The shortest gate time that rejects both 50 and 60 Hz modulation is 100 ms,
which is the value chosen in Auto, or on Preset or when Auto Couple is pressed.
The start time of the Gate Time of the counter must be controlled by the same trigger parameters
as controls the sweep. Thus, if the Trigger is not in Free Run, the counter gate must not start until
after the trigger is received and delayed.
Key Path Marker Function, Marker Count
Remote Command :CALCulate:MARKer[1]|2|...12:FCOunt:GATetime <time>
:CALCulate:MARKer[1]|2|...12:FCOunt:GATetime?
:CALCulate:MARKer[1]|2|...12:FCOunt:GATetime:AUTO OFF|ON|0|1
:CALCulate:MARKer[1]|2|...12:FCOunt:GATetime:AUTO?
Example :CALC:MARK2:FCO:GAT 1e–2 sets the gate time for Marker 2 to 10^(–2) s = 10 ms.
Notes When Auto Couple is pressed, Gate Time is set to 100 ms.
Notes This command causes the specified marker to become selected.
Preset 100 ms
ON
State Saved Saved in instrument state.
Min 1 us
Max 500 ms
Initial S/W Revision Prior to A.02.00
Remote Command :CALCulate:MARKer[1]|2|...4:FCOunt:RESolution <freq>
:CALCulate:MARKer[1]|2|...4:FCOunt:RESolution?
:CALCulate:MARKer[1]|2|...4:FCOunt:RESolution:AUTO ON | OFF | 1 | 0
:CALCulate:MARKer[1]|2|...4:FCOunt:RESolution:AUTO?
Notes This command is provided for ESA compatibility, which allowed the user to control the gate
resolution, rather than the gate time.
:CALCulate:MARKer[1]|2|3|4:FCOunt:RESolution <freq> Sets the gate
time to 1/freq
:CALCulate:MARKer[1]|2|3|4:FCOunt:RESolution? Returns 1/gate_time
726 Remote Language Compatibility Measurement Application Reference