User`s guide

12
• Window selection: The highlighted window on the
E4419A/B display is equivalent to what would
be shown on the 438A. Sometimes it may be
beneficial to have just the highlighted window
shown. This command allows either a single
or dual window display.
• Measurement speed: In normal speed, up to 20
readings per second can be made. In fast mode,
up to 40 readings per second are obtainable.
This command allows either 20 or 40 readings
per second to be selected. Note that number
of readings per second achieved is controller
dependent.
4.13 Must calibrate/zero
The E4418B and E4419B power meters have a
“Must cal/zero” feature. This feature can be enabled
to prevent measurements being made until the
connected sensor is zeroed and calibrated. With
this feature enabled and when making a measure-
ment, the following will be reported if a zero or
cal is required:
• 437B language:
+9.0036+40 will be returned.
The status message will report measurement
error 30. The OD command will return “MUST
ZERO/CAL”
• 438A language:
+9.0036+40 will be returned for Channel A.
+9.0037+40 will be returned for Channel B.
The status message will report measurement
error 36 for Channel A and measurement
error 37 for Channel B.
SINGLE
DUAL
20
40
SPD