HP 5065A Operating And Service Manual page 138

Model 5065A
Circuit Diagrams, Theory, and Maintenance
Figure 7-14. Top Operating Controls
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1. Synthesizer T I M E C L O C K SELECTOR t h u m b ­
wheel s w i t c h : selects synthesized frequency
2 Synthesizer T I M E SCALE SELECTOR H l - L O
switch: used w i t h thumbwheel switch to select
synthesized frequency.
3 C L O C K SET STOP switch (Option 001 only).
digital clock is stopped when switch is depressed.
starts when released.
4 C L O C K SET FAST switch (Option 001 only)
digital clock second hand is accelerated when
switch is depressed, resumes normal operation
when released
5 Clock SYNC switch (Option 001 only) Syn­
chronizes digital clock with an external clock
when depressed: clock remains synchronized
wnen released
Clock TIME DELAY thumbwheel switch (Option
001 only) selects time delay between an ex­
ternal reference pulse and the internal 1 pulse-
per-second clock pulse Adjustable in decade
steps from 1 ps to 1 sec.
0-1 USEC TIME DELAY c o n t r o l (Option 001
only) Allows c o n t i n u o u s adjustment of clock
pulse delay over any 1 /jsec range
Battery fuse removed momentarily to d i s c o n ­
nect optional standby battery from circuit for
storage or shipment Battery will remain dis­
c o n n e c t e d after fuse is replaced
7-37