Single Coil With Separate Position Indicators Connection Diagram - Agilent Technologies 34945A User Manual

5
Additional Operating Information
The power supply recovery time can be set for each channel, and is set to
0.0 ms during a bank preset (Chapter 4). The recovery time can be changed
using the command:
ROUTe:CHANnel:DRIVe:TIMe:RECovery
When verifying channel closure, you can also specify a settling time (T(Settle)).
This parameter ensures the switch has had time to change state before the
position indicator (of the switch) is evaluated.
The settling time can be set for each channel and is set to 0.0 ms during a bank
preset (Chapter 4). The settling time can be changed using the command
ROUTe:CHANnel:DRIVe:TIMe:SETTle

Single Coil with Separate Position Indicators Connection Diagram

The simplified schematic on the following page illustrates the connection for a
single coil switch (e.g. 8710x, 8740x) with separate position indicators. The
position indicators for this type of switch are independent relay contacts that
are mechanically linked to the RF switch position.
Even though this is a single coil (drive) switch, each switch state has its own
coil. The switch uses internal logic to open all paths except the one being
closed.
The RF paths are not shown in the simplified diagram. The coils are driven in
open collector mode. The position indicator is set so that a high level indicates
an active switch. The logic level of the position indicator can be inverted using
the command.
ROUTe:CHANnel:VERify:POLarity
The schematic shown is similar to the Agilent 87104A/B/C, 87106A/B/C, and
87406B switches. Many other switches use this technique (both with and
without the position indicator) but may not have the logic described.
Agilent 34945A Microwave Switch/Attenuator Driver Module User's Guide 101