HP 5335A - Page 38

Operation and Programming
3-106. To measure a specific rise time manually, set both slopes to positive and set the INPUT
SEPARATE/COMMON key to COM A. Setting the trigger levels to the desired points is simplified
by using AUTO TRIG, however, the input signal to Channel A should be continuous. The selected
trigger levels may be viewed by pressing the TRIG LVL key, or monitoring the rear panel trigger
level outputs. For rise time measurements using the 10% and 90% points, see RISE TIME A.
i t
MEASURED
3-107. The T.l. DELAY mode is useful for making time interval measurements on signals, where
false triggering (due to settling time, relay contact bounce, etc.) must be avoided. To insert a
delay, set the GATE MODE to FAST (for a delay range of 100 jus to 20 ms) or NORM (for a delay
range of 20 ms to 4 s) and use the GATE ADJ control to select the required delay.
POTENTIALLY FALSE
STOP TRIGGERS, DUE STOP “DISABLED'*
TO RELAY ----—--—
3-108. To measure the time interval between two arbitrary pulses in a pulse train, use the
counter's external arming capability. Set the External Arm Start switch to select the starting
pulse. Generate the arming signal from a timing generator. If the pulse width of the generator is
programmable, you can also use this signal to specify the second pulse. If not, you may be able
to use the stop hold-off delay feature described in the previous example.
CHANNEL A
COM A ON
ARMING SIGNAL
STOP DELAY HOLD OFF
ruini
i ^
TIME MEASURED
STOP “DISABLED"! !
1 -~-
3-22
Model 5335A