Agilent Technologies E4418B User Manual page 56

Power Meter Operation
Zeroing and Calibrating the Power Meter
Table 2-4: TTL Inputs Timing Diagram 2
Timing of zero/cal inputs for condition "00".
Inputs
Operation
Time
T5 Maximum time between inputs going low.
T6 Minimum overlap of low inputs.
T7 Time between input detection and start of zero/cal cycle.
This is determined by the number of averages x sample
rate, or if there is an existing zero/cal operation in
progress, the time for this current operation to complete.
Note that the worst case is 1024 averages x 50 ms = 51.2
s. For front panel operation (in free run mode) the time is
1 x 50 ms.
T8 Time for cal operation to complete.
All timings based on 100 ms firmware polling.
If both TTL inputs are simultaneously low under any circumstances other than those shown above, the
operation is undefined.
2-14
T5
T6
T7
T8
Description Value
100 ms
200 ms
4 s
Cal: 6 s (8480 series)
7 s (E series)
Agilent E4418B User's Guide