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Model 5065A
Circuit Diagrams, Theory, and Maintenance
A14 Logic Table
Function
Cell Oven (Oven
Off Signal)
Cell Oven (Oven
Over-Heat Signal)
Lamp Oven (Oven
Off Signal)
Lamp Oven (Oven
Over-Heat Signal)
2nd Harmonic Signal
Fundamental Error
Signal (137 Hz)
Synthesizer Lock Signal
Light Disable Signal
Normal Condition
(Continuous Operation Light On)
Positive Voltage Approximately Halfway
Between Ground and Dc Supply Voltage
Same as above
Same as above
Same as above
" H " when "On Frequency"
"L" for minimum 137 Hz when
"ON Frequency"
"L" for absence of synthesizer logic input
when "On Frequency"
When +20 volts connects to C2 in the
OPER position of the FUNCTION switch,
resulting positive spike is inverted by Q4
for a "no-go" negative spike which latches
CR13 off and disables the CONTINUOUS
OPERATION light until the LOGIC
RESET pushbutton is depressed to turn
onCR13
Abnormal Condition
(Causing Continuous Operation Light Off)
" H " * causing Q8 to cut off and deliver
an " H " input to Q15
"L"* causing Q5 to cut off and deliver
an " H " input to Q15
" H " * causing Q12 to cut off and deliver
a n " H " input to Q15
"L"* causing Q12 to cut off and deliver
an " H " input to Q15
"L" for absence of 2nd Harmonic when
"off frequency"
" H " for large amount of 137 Hz when
"off frequency"
" H " Synthesizer Lock Signal present
indicating: (1) No Phase Lock
(2) No 5.315...MHz
. ,
„.
*With respect to normal voltages.
8-62
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