Controller Assembly - Ametek California Instruments MX15 Series User Manual

5.3 Controller Assembly

The Controller Assembly is located in the top section of the MX15 unit. To access this assembly,
the top cover needs to be removed. The controller contains the main oscillator, which generates
the sine wave signal setting the frequency, amplitude and current limit level. It also senses the
output voltage to provide closed loop control of the output. The controller also handles all user
interface and remote control related tasks.
5.3.1 CPU Controller
This board assembly, A2, consists of the components for the CPU (DSP), generating the Phase
waveform signal to the power amplifier, programmable impedance (MX15-1Pi model only) and
all of the program, waveform and data memory. In addition, the waveform board contains the
circuits for all measurements. The clock and lock circuit required to support the clock and lock
mode of operation of multiple MX units is also on this board assembly.
5.3.2 Keyboard / Display Board
The keyboard/display assembly is assembly A5. It is mounted to the front panel and holds the
21 rubber keys. It also has the LCD display. A shaft encoder is mounted on the board that is
used as a shuttle input to allow slewing of setup parameters. If the MX15 system is used over
one of the remote control interfaces, the keyboard functions can be locked out by asserting the
REMOTE state. See the MX Series Programming Manual (P/N 9003-961) for details.
5.3.3 GPIB / RS232 or GPIB / RS232 / USB / LAN IO Boards
This board assembly is identified as A1. It has the IEEE 488, RS232 and USB transceivers and
optionally an Ethernet interface (-LAN option). USB and LAN are available on top assembly
7005-403 MX models only. It also has isolators to provide safety isolation for both interfaces and
additional user accessible I/O lines. Additional user accessible inputs and outputs available
through this assembly are as follows:
• Trigger Input BNC
Trigger Output BNC
•
Function Strobe BNC
•
Remote Inhibit (terminal strip)
•
External Sync (terminal strip)
•
Clock BNC (option)
•
Lock BNC (option)
•
Output Status (Available on top assembly 7005-403 only.)
•
MX15 Series 105