Racal Instruments 9057 Technical Manual page 24

DISPLAY DISPLAY DISPLAY DISPLAY DISPLAY DISPLAY
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STORE STORE STORE STORE STORE STORE
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CONTROL
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ASSEMBLY
FIRST
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COUNTING
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DECADE
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1
1 1
SECOND THIRD FOURTH FIFTH SIXTH ICI3
OVERFLOW
LAMP
COUNTING
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COUNTING
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COUNTING
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DECADE DECADE DECADE DECADE DECADE DRIVE
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GATING
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GATE TIME OR
1
No.OF
PERIODS~
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IC8
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1C9
~10
IC10
DISPLAY
AND RESET
GENERATOR
TRANSFER
DRIVE
-710
IC11
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-Ve RESET
DP.
DATA
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PUSH BUTTON
RANGE SWITCHES
FREQUENCY
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PERIOD
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+
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0 0 0 0
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LEVER
1
c
~--9059
O N L Y - - - - - - - - - - - - l
1
1
40MHz AMPLIFIER
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TO
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AND .-
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560MHz PRE-SCALER
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AMPLIFIER
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SHAPER
10Hz
TO
80MHz
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ELECTRONIC
SWITCH
710
IC6
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100kHz
710
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ICS 1C4
ELECTRONIC
SWITCH
100kHz
100kHz
CHECK
SIGNAL
Simplified Block Diagram Type 9057/9059
-:-t
0
1C3
_ _ _ _ _ _ _ _ _ _ _
SWITCH~
-:-s
SMHz
IC1 OSCILLATOR
IMHz EXTERNAL FREQUENCY
STANDARD INPUT
FRONT PANEL CONTROLS
RESET
SWITCH
Fig. 2·1