6. Symmetricom Serial Interface Protocol
Mode CN1B Flag 0005 Unit serial code is 0311BB0198-h, current tuning
state is 6
Crystal: 3938700hz, ACMOS: 989680.00000000hz, Sine: 989680.00000000hz
Ctl Reg: 0204, Res temp off: BFC53F7D., Lamp temp off: C003B7E9.
FC: disabled, Srvc: low
r>
Adjust Frequency (commands f and t)
User Output to the 8200
Command Name and Description
Command
DATA
f
Desired frequency change from
free running center frequency in
parts to E
–11
Example: for a +100xE
–11
change: “100<cr>”
Example: for a –100xE
–11
change: “–100<cr>”
Adjust Frequency
Adjust Unit output frequency. Used to discipline
the unit. The smallest incremental frequency
change is 2xE
–12
(or “f.2”).
Any value less than this will still be used.
Max value that can be used at one time is 4E
–8
.
For larger frequency changes, repeated steps
equal to or smaller than 4E
–8
should be used.
Unit always powers up at free running factory set
frequency, unless “T” command is used.
This command is always relative to the free run-
ning frequency.
t
Save tuning data
Saves current DDS frequency, so the changes
made with “f” command become permanent. The
command is password protected. The password is
“5987717”.
Factory Mode
Data output from the 8200 in factory mode is not intended for users outside the factory and is not
described in this document.
Caution:
Using factory mode can result in the erasure of firmware on the 8200 rendering it inoperable
and making it necessary to return the unit to the factory for re-programming.
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