Keysight 53210A, User Manual

Page: 139 / 247

Triggering and Gating 5
Keysight 53210A User’s Guide 139
Setting the Gate Time
A measurement gate time can be specified directly with the command:
[SENSe:]FREQuency:GATE:TIME {<time>|MINimum|MAXimum|DEFault}
[SENSe:]FREQuency:GATE:TIME? {MINimum|MAXimum|DEFault} (query form)
CONFigure
and
MEASure
automatically set the gate source to
TIME,
and the gate
time according to their optional expected value and resolution parameters.
Specifying these parameters or using default values with these commands
simplifies counter programming. However, setting/changing the gate time
separate from the
CONFigure
/
MEASure
command allows you to change only the
gate time while preserving other configuration settings.
Table 5-2 Resolution and Gate Time.
Gate Time (53210A)
(T
ss
= 100 ps)
Resolution (Digits)
Reciprocal
Calculating Digits and Gate Time
1 msec 7 Digits as a function of gate time:
Digits = Log
10
(gate time/T
ss
)
Digits as a function of expected value
(CONFigure, MEASure)
Digits = Log
10
( expected value) -
Log
10
( resolution )
Gate time as a function of digits:
gate time = (10^digits) * T
ss
10 msec 8
100 msec 9
1 sec 10
10 sec 11
100 sec 12
1000 sec 13