Agilent Technologies 75000 Series B Configuration Manual page 16

Switchbox Instrument
The Switchbox instrument is composed of one or more switch modules. The single module Switchbox
behaves as an independent instrument as described earlier. When using the multiple module Switchbox, all
switch modules are programmed together and behave as if they are one instrument. The multiple module
Switchbox configuration is recommended when you need to:
•
Simplify the programming of multiple switch modules.
•
Group multiplexers together to create a larger multiplexer.
•
Make scanned measurements but are not using the Agilent E1326B Multimeter (if you are using the
Agilent E1326B, use the Scanning Multimeter configuration).
•
Close channels on more than one module simultaneously.
To create a multiple module Switchbox, set one switch module's logical address to a multiple of eight and
assign the other switch modules successive logical addresses. If applicable, you then connect the Analog Bus
cables between all modules (this is shown in detail later in Step 7).
Figure 1-3 is a block diagram example of a Switchbox instrument containing three multiplexers. In this
example, one multiplexer has a logical address of 112, the other multiplexers have successive logical
addresses of 113 and 114. The multiplexers are linked together using the Analog Bus to form a larger
(48-channel) multiplexer. In this example, the Switchbox will be programmed at GPIB secondary address
14. This address is derived by dividing the first multiplexer's logical address by eight (112/8 = 14).
Agilent E1345A
16-Channel
Relay Multiplexer
Logical Address = 112
Secondary Address = 14
These modules can be used to form a Switchbox:
E1343A 16-Ch. High Voltage Multiplexer
E1344A 16-Ch. Thermocouple High Volt Multiplexer
E1345A 16-Ch. Relay Multiplexer
E1346A 48-Ch. Single Ended Relay Mult iplexer
E1347A 16-Ch. Thermocouple Relay Multiplexer
E1351A 16-Ch. FET Multiplexer
E1352A 32-Ch. Single-Ended FET Mult iplexer
E1353A 16-Ch. Thermocouple FET Multiplexer
Ω
E1355A 8-Ch. 120
Ω
E1356A 8-Ch. 350
1-8 Inst alling the Syst em
Agilent E1345A
Relay Multiplexer
Analog Bus Cable
Logical Address = 113
Figure 1-3. Switchbox Instrument Block Diagram
Strain Relay Multiplexer
Strain Relay Multiplexer
16-Channel
Analog Bus Cable
E1357A 8-Ch. 120
E1358A 8-Ch. 350
E1361A 4 x 4 Relay Matrix
E1364A 16-Ch. Form C Sw it ch
E1366A 50
E1367A 75
E1368A 18 GHz Microw ave Sw itch
E1369A Microw ave Sw itch Driver
E1370A Sw itch Microw ave/At tenuat or Driver
Agilent E1345A
16-Channel
Relay Multiplexer
Logical Address = 114
Ω
Strain FET Multiplexer
Ω
Strain FET Multiplexer
Ω
RF Multiplexer (2 x 4:1)
Ω
RF Multiplexer (2 x 4:1)