User`s guide

Agilent 4155C/4156C User’s Guide Vol.2, Edition 6 7-21
Measurement Units and Functions
Measurement Units
Output Impedance
For the PGU pulsed outputs, you must select the PGU output impedance from 50 Ω
and Low impedance (approx. 0 Ω). And PGU output value is defined to be the value
that is output if the PGU output terminal is open.
So, when a load is connected and PGU impedance is set to 50 Ω, the actual output
value will be different. For example, if connected load is 50 Ω, specified PGU
output impedance is 50 Ω, and specified output value is 2 V, the PGU outputs 1 V.
If the impedance of the load connected to the PGU is not 50 Ω or low impedance,
the average output current may exceed
±100 mA. If so, a warning message is
displayed.
Pulse Count
Allowable range: 1 to 65535. If you use two PGUs, both PGUs are set to the same
pulse count. You cannot set different values for each PGU.
Pulse Period, Width, Delay Time
Each parameter has six setting ranges as shown in Table 7-15. The period, width,
and delay time must be set in the same range. Also, if you use two PGUs, both
PGUs are set to the same pulse period value. So, these three parameters must be set
in the same range for both PGUs.
Table 7-15 Ranges of Pulse Period, Pulse Width and Delay Time
Range Pulse Period Pulse Width
Delay Time
a
a. The setting range of delay time is 0 ≤ delay time ≤ specified pulse period.
Resolution
12.0 μs to 100.0 μs1.0 μs to 99.9 μs 0 to 100.0 μs0.1 μs
2 100 μs to 1000 μs1 μs to 999 μs 0 to 1000 μs1 μs
3 1.00 ms to 10.00 ms 0.01 ms to 9.99 ms 0 to 10.00 ms 10 μs
4 10.0 ms to 100.0 ms 0.1 ms to 99.9 ms 0 to 100.0 ms 100 μs
5 100 ms to 1000 ms 1 ms to 999 ms 0 to 1000 ms 1 ms
6 1.00 s to 10.00 s 0.01 s to 9.99 s 0 to 10.00 s 10 ms