Go to Contents Precise Time and Frequency, Inc., 50L Audubon Road, Wakefield, MA 01880, USA ptf 3207A rev G
Tel: +1-781-245-9090 e-mail: info@ptfinc.com www.ptfinc.com pg. 13
J5 Output – Time Code Output to IEEE1344
Time Code Output Specifications - IRIG B120 modulated (am)
Format: IRIG-B120
Amplitude (AM): 3 Vp-p, into 50 Ohms
Ratio (AM): 3:1 ±10%
Quantity: 1
Connector: Female BNC
Default Configuration: Enabled
IRIG-B-120 IS DEFINED IN IRIG STANDARD 200-04 AS:
• Format B 100 pps
• 1 = Sine wave amplitude modulated
• 2 = 1KHz carrier/1mSec resolution
• 0 = BCD TOY,CF,SBS
IEEE1344 IS DEFINED IN IEEE1344-1995(R2001) ANNEX F AS:
IRIG-B format, <sync>SS:MM:HH:DDD<control bits> <binary seconds>
where :
<sync> is the on time marker
SS seconds 00-59 (60 during leap seconds)
MM minutes 00-59
HH hour of day 00-23
DDD day of year 001-366
<control> 27 binary control characters, see Table 1 (reference IEEE1344)
<binary seconds> binary seconds of day
Binary Time quality Estimated Time Error (ETE)
1111 Initial condition clock unlocked or 10Sec < ETE
1011 Clock unlocked and 1Sec < ETE <= 10Sec
1010 Clock unlocked and 100mSec < ETE <= 1Sec
1001 Clock unlocked and 10mSec < ETE <= 100mSec
1000 Clock unlocked and 1mSec < ETE <= 10mSec
0111 Clock unlocked and 100uSec < ETE <= 1mSec
0110 Clock unlocked and 10uSec < ETE <= 100uSec
0101 Clock unlocked and 1uSec < ETE <= 10uSec
0100 Clock unlocked and 100nSec < ETE <= 1uSec
0011 Clock unlocked and 10nSec < ETE <= 100nSec
0010 Clock unlocked and 1nSec < ETE <= 10nSec
0001 Clock unlocked and ETE <= 1nSec
0000 Clock locked to a reference source
Many IRIG reader devices only decode the BCD time-of-year (TOY) portion of the IRIG frame. Reader
devices designed to the IRIG-B122, B002 standard should be compatible with the ptf 3207A’s time
code outputs.
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