CHAPTER FOUR
4-16
bc620/627AT Time and Frequency Processor
Symmetricom, Inc.
4.1.15 PACKET “Q”' - SET DISCIPLINING GAIN
This packet allows the gain and sense of the disciplining process to be set via the host bus.
Originally this feature was used for Symmetricom Inc developmental purposes, but it could be
useful when attempting to discipline an external oscillator using the TFP. The format is as
follows:
byte
1
SOH.
byte
2
“Q.”'
byte
3
“0” - “F” least significant nibble.
byte
4
“0” - “F” most significant nibble.
byte
5
sense “1” = positive (default) “0” = negative.
byte
6
ETB.
4.1.16 PACKET “R” - GENERATOR TIME OFFSET SELECT
This packet allows the time code generator output to be offset from the TFP time. This is useful,
for example, when UTC time is maintained in the TFP but local time must be generated to other
devices such as time displays. The offset only applies to the hours digits. The format is as
follows:
byte
1
SOH.
byte
2
“R.”
byte
3
Sign
“+” or “-”.
byte
4
Hours Tens.
byte
5
Hours Units.
byte
6
ETB.
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