OPTION DESCRIPTIONS
• Sequentially pushing keyboard Switch Two will cycle through the various pulse rates,
starting with 1pps.
• When all the parameters are selected for a channel (output), the #4 keyboard switch must be
pushed for them to be entered.
The selectable pulse rates can also be controlled/programmed via the RS232 I/O. To set up the
pulse rates, the user must perform the following steps:
The user enters $f (HEX 24/HEX 46) followed by six digits.
The first digit (after log-on and I.D. characters) is the channel (output) select.
0 = Channel One
1 = Channel Two
3 = Channel Three
The next two digits are a code to select the pulse rate.
01 = 1pps
02 = 10pps
03 = 2400pps
The last three digits are required for a complete command, but any digit can be entered because
they aren’t used.
Example: $F103XXX
The above example indicates the user selecting Channel Two to have a
pulse rate of 2400pps.
The unit responds with OK CR/LF
To request a pulse rate via the RS-232 I/O, the user performs the following steps:
The user enters $G (HEX 24/HEX 47).
Channel (output) number
Space
Four digits of pulse rate followed by pps
space
(the above is repeated for each channel followed by CR/LF).
Symmetricom Inc ET6xxx ExacTime GPS TC & FG (Rev C) C-33
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