Executive Block Assembly; Measurement Block Assembly; Input Amplifier Block Assembly; Dac Block Assembly - HP 5334B Service Manual

8-78. Data is transferred between the MCUs, and to and from the other functional areas over lwo data buscs,
the Executive Data Bus and the Measurement Data Bus. Since the data buses are used for communicating with
many devices, control lines generate signals to tell selected devices that the data on the bus is intended for them.
8-79. The instrument consists of eleven major functional circuit blocks, listed below:
Executive Block
Measurement Block
Input Amplifier Block
Digital-to-Analog Converter (DAC) Block
Time Base Block
HP-IB Block
Power Supply Block
Channel C Input Block (Option 030)
MATE (CIIL) Block (Option 700)
Oven Oscillator Module (Option 010)
A2 Front Panel Board
8-80. Executive Block Assembly
8-81. The Executive Block controls the overall operation of the HP 5334B. This MCU rcccivcs instructions
through the front panel or the HP-IB MCU. The Executive MCU continuously scans the keyboard for any
change and updates the display accordingly.
8-82. Measurement Block Assembly
8-83. The Measurement Block carries out all measurement functions of the HP 5334B under conlrol of the
Measurement MCU. This MCU receives instructions from the Executive MCU and, in turn, controls all funclion-
al blocks which input a signal to the Measurement Block.
8-84. Input Amplifier Block Assembly
8-85. The Input Amplifier Block contains a pair of matched 100 MHz amplifier circuits, Channcl A and Chan-
nel B. This circuitry buffers and shapes the input signal before sending it to the Mcasurcmcnt Block.
8-86. DAC Block Assembly
8-87. The DAC Block converts a digital code from the Measurement MCU to an analog DC voltagc for setting
the amplifier sensitivity and trigger level, or for providing a reference for reading input lcvcls and amplitude
peaks.
8-88. Time Base Block Assembly
8-89. The Time Base Block provides a buffered 10 MHz reference signal to the Measurement Block. The
10 MHz is generated by either the standard crystal oscillator circuit on the A1 Main Board or the Option 010
Oven Oscillator. In addition, the Counter will accept an external 10 MHz signal through a rcar panel BNC con-
nector.
8-90. HP-IB Block Assembly
8-91. The HP-IB (Hewlett-Packard Interface Bus) Block handles all HP-IB interfacing. The HP-IB MCU
decodes commands to the Executive MCU and formats data which is transmitted via this interface.
HP 5334B
- Senrice
Manual
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