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78 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP
Totalizer
Capacity
Minimum Pulse Width
Frequency Range
24 bits or 16,777,215
500nS
0-100 KHz
Frequency Measurement
Gate Time ( t
aperture
)
1 mSec to 1 Second, resolution
Range
to
Accuracy .01%
Resolution (Hz)
Minimum Pulse Width 500 nS
1
f
in
-----
1
t
aperture
--------------------
100 000,
f
input
t
aperture
4.194MHz×
-----------------------------------------------------
Period Measurement
Gate Time ( t
aperture
)40 µSec to 4 Second
Range (SENS:PER:RANGE=1)
to (1 sec max)
(SENS:PER:RANGE=4)
to (4 sec max)
Accuracy .01%
Resolution .2384µSec
Minimum Pulse Width 500 nSec
10µSec t
aperture
40µSec t
aperture
Time-out Mechanism
(SENS:FREQ:LIM:LOW & SENS:PER:LIM:UPP)
Programmable 4mSec to 60Sec
Aperture Time
The aperture time is the time allowed to average multiple period and frequency measurements
Function Aperture Range
Frequency
Period (2 ranges)
1mSec to 1 Sec
1mSec to 1 Sec (SENS:PER:RANGE 1)
4mSec to 4 Sec (SENS:PER:RANGE 4)