Fluke PM6690 Service Manual page 35

LINE
SEPARATE BOARD
PWR
AC/DC
+15 V +5 V
POWER
SUPPLY
JTAG
PRESCALER
C
OPTION
A
INPUT
AMPLIFIERS
B
TRIG LVL
*
EXT REF IN
*
EXT CTRL IN
Figure 4-7
Block diagram of the '90'.
ON/OFF
-15 V
+15 V
+12 V
+5 V
-12 V
-5.2 V
-2.1 V
+3.3 V
+1.8 V
MICROPROCESSOR
RESET
STD OSC
OPT OSC
100 MHz
LVL
CONV
*
REAR PANEL CONNECTORS
MEMORY
-FLASH 8 MB
-SDRAM 32 MB
ARM 7
2
I C
SPI
PLL
SPI
MEASURING LOGIC
(FPGA)
INTERPOLATORS
4 X
FAN
STDBY
LED
KEYBOARD
LCD
DISPLAY BOARD
TEMP
SENSOR
USB
GPIB
GATE LED
TRIG LED A
TRIG LED B
DISPLAY BOARD
INT REF OUT
Block Diagram Description 4-13
*
*
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