User`s guide

154 53220A/53230A User’s Guide
5 Triggering and Gating
Wait-For-Trigger and Triggered States
In order for the counter to accept triggers which start the trigger and gate
cycle, the counter must be initiated. Initiating the counter places the instru-
ment in the wait-for-trigger state (Figure 5-4).
Figure 5-4. The Counter ‘Wait-for-trigger’ State.
The counter can be initiated using the following commands:
NOTE
The trigger count and sample count are ignored when making continuous totalize
measurements. The trigger count is also ignored when making continuous,
gap-free frequency or period measurements. Only one trigger is accepted when
using these functions. See the ‘Programmer’s Reference’ section of the Agilent
53210A/53220A/53230A Product Reference CD for more information.
triggers received
=
TRIGger:COUNt?
# readings
=
SAMPle:COUNt?
Yes
No
Yes
No
I
NITiate:IMMediate
R
EAD?
M
EASure?
Triggered state
(to gate cycle)
(repeated for each reading in sample count
(from gate cycle)
Wait-for-trigger state
trigger received