Option 002, Standby Power Supply - HP 5065A Manual

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4-18. Two 1 PPS inputs connect to the A16 Digital Div-
ider Power Supply from the AS module. One input pulse
is shaped in a blocking oscillator and then amplified to
provide the front panel 1 PPS "tick" output. The other
1 PPS input triggers a flip-flop stage which provides
clock-driving pulses. The flip-flop output drives push-pull
amplifiers to pulse the front-panel clock at a 1 PPS (or
10 PPS) rate.
4-19. The A14 Logic Assembly monitors several key
points in the 5065A circuits and turns off the CONTIN-
UOUS OPERATION lamp to indicate an operational
discontinuity when one or more of the logic inputs in-
dicate a "non-operating" condition. These logic inputs
are shown in Table 4-1. In addition to the CONTIN-
UOUS OPERATION lamp output, the Logic Assembly
delivers an INTEGRATOR LIMIT lamp output when the
A9 integrator output exceeds 50% of maximum. After
an operational discontinuity, the LOGIC RESET switch
resets the CONTINUOUS OPERATION lamp when all
logic inputs are "operational."
4-20. OPTION 002, STANDBY POWER SUPPLY
4-21. Standby Power Supply Option 002 automatically
cuts in battery power if there is an ac (or de) line in-
terruption; for example when the unit is moved. This
is accomplished by floating the battery across the
power supply so that the battery takes over should ac
(or de) line power fail. This option consists of A2
Battery Charger Assembly, the nickel-cadium battery,
and the BATTERY switch and lamp. The nickel-cadium
a.
b.
c.
d.
e.
f.
Model 5065A
Circuit Diagrams, -heory, and Maintenance
Table 4-1. Logic Signals
Signal
Non-Operational
Condition
Synthesizer Lock When present
Signal
AC Amplifier 2nd
When absent
Harmonic Signal
Phase Detector When too much signal
Fundametal Error
Signal
Cell Temperature When cell oven is full
Signal
on or turned off
Lamp Temperature When lamp oven is
Signal
full on or turned off
Function Switch When present with
Signal
Function switch at
LOOP OPEN
standby battery is charged as desired in either FAST
CHARGE mode or a FLOAT (trickle charge) mode by
a constant current charging circuit. The front pan.el
BATTERY lamp pulses on and off to indicate a line-
power discontinuity. With the BATTERY switch at
FAST CHARGE, the BATTERY lamp glows steadily.
4-22. The FAST CHARGE position of the BATTERY
switch is used to recharge the battery after discharge.
After charging in the FAST CHARGE position, the
BATTERY switch is set to FLOAT. for a trickle charge
to maintain battery charge. - ·
Figure 4-3. RVFR Assembly Block Diagram
SPECTRAL
LAMP
RF OSCILLATOR
•100 MHZ
FILTER
CELL
Rb85 ____...
)
BUF~ER
- -
GAS / - - -
ABSORPTION
CELL AND
MICROWAVE
CAVITY
Rb87
+
BUFFER
GAS
- -
SOLAR
CELL
4-3