2 Power Meter Operation
38 E4418B Power Meter User’s Guide
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.
4 s
T8 Time for cal operation to complete. Cal: 6 s (8480 Series)
7 s (E-Series)
9 s (N8480 Series exclude
Option CFT)
6 s (N8480 Series with Option
CFT)
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.
Table 2 - 4 TTL Inputs Timing Diagram 2
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