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Chapter 1
Getting Started with the
HP E1366A/E1367A RF Multiplexers
Using This Chapter
This chapter includes an RF multiplexer’s description, addressing
guidelines, and an example to check initial operation. Chapter contents are:
• Multiplexer Module Description . . . . . . . . . . . . . . . . . . . . . Page 11
• Programming the Multiplexer Module. . . . . . . . . . . . . . . . . Page 13
• Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
Multiplexer Module Description
The HP E1366A 50Ω RF Multiplexer (2 x 4:1) and the HP E1367A 75Ω RF
Multiplexer (2 x 4:1) are VXIbus and VMEbus B-size register-based
products which provide bidirectional switching and scanning for user inputs
and outputs. The multiplexers can operate in a B-size VXIbus or VMEbus
mainframe or (with an adapter) in a C-size VXIbus mainframe.
For the RF multiplexers, switching consists of connecting a channel to its
common terminal. Scanning consists of connecting a series of channels
(one at a time) to the appropriate common terminal.
Basic Operation The multiplexers consist of two banks of channels (bank 0 and bank 1) to
form two 4:1 multiplexers. Bank 0 includes channels 00 through 03 and
com 00. Bank 1 includes channels 10 through 13 and com 10. S`ee Figure
1-1 for a simplified switching diagram.
Each channel is switched (connected to its common) by closing the
appropriate (nonlatching) relays. Channels 00 through 03 can be switched
to com 00, and channels 10 through 13 can be switched to com 10. Only
one channel in each bank can be connected to its common at a time.
User inputs and outputs to each channel are made through BNC connectors.
When open (disconnected from common), each channel is terminated in its
characteristic impedance (50Ω for the E1366A, 75Ω for the E1367A).
A termination resistor (50Ω for the HP E1366A or 75Ω for the HP E1367A)
is mounted on each channel, but can be removed as desired. At power-on or
reset, all channels are open and terminated in their characteristic impedance,
and both commons are open.
Chapter 1 Getting Started with the HP E1366A/E1367A RF Multiplexers 11