Microwave Switch/Attenuator Driver
8
34980A User’s Guide
217
Using Pulse Drive
To use the pulse drive mode, send the
ROUTe:CHANnel:DRIVe:PULSe:MODE ON
command or pair two channels
with the
ROUTe:CHANnel:DRIVe:PAIRed:MODE
command. The diagram
below illustrates the pulse drive for two channels (switches) and the
relationship of the drive parameters to the power supply requirements.
As shown in the diagram, the drive is applied to channel 1 and held for
the T(Pulse) time set using the
ROUTe:CHANnel:DRIVe:PULSe:WIDTh
command. Drive is applied to channel 2 only after a power supply
recovery period has elapsed T(Recovery). The power supply recovery
time is set using the
ROUTe:CHANnel:DRIVe:TIMe:RECovery
command.
This parameter may be set individually for each channel or will default
to 0.0 ms following either a
SYSTem:RMODule:RESet
or
ROUTe:RMODule:BANK:PRESet
command.
If you are verifying the channel operation (see
page 218
), you may also
specify a T(Settle) parameter. During T(Settle) the switch is considered
‘busy’. This parameter ensures the switch has had time to change state
before the verification. This parameter may be set individually for each
channel or will default to 0.0 ms following either a
SYSTem:RMODule:RESet
or
ROUTe:RMODule:BANK:PRESet
command.
Unlike other switch modules, the 34945A will always pulse a channel in
response to a
ROUTe:OPEN
or
ROUTe:CLOSe
command. For example, sending
ROUTe:CLOSe
to a channel three times in a row will result in three
output pulses.
T(Setttle)
T(Recovery)
Drive Ch 1
Drive Ch2
Start Drive
Channel 1
Start Drive
Channel 2
Channel 1 Position
Indicators Evaluated
T(Pulse)
N O T E
A single drive channel operating in pulse mode with channel verification
(see
page 218
) turned off (default) will report the channel as ‘stateless’
and the
ROUTe:CLOSe?
query will return an error. Single drive pulsed
channels must have verification enabled
(
ROUTe:CHANnel:VERify ON
) to query the channel state using the
ROUTe:CLOSe?
query.
Содержание Agilent 34980A
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