Fluke PM6685 - Page 19

Block Diagram Description 4-3
Local preset
Optional oscillator
External arming
External reference
HF input
Input Amplifier
Reset circuit
Power supply
90-265 V
Micro-
computer
Counter
ASIC
10 MHz out
Gate LED
Display
Analog output
GPIB option
Keyboard
+7V
+5V
-5.2V
A
C
IC
2
PWM
E
C
D
A
G
RESET
U11
HSI.0
X2
EXTC
B2
EXTREF
A
A2
U29
GET
Trigger DAC´s
INTREF
÷2
+12V
Option 80
Fig. 4-1 PM6685 block diagram.