Signal Description GPS170
Name Pin Function
GND 32a+c Ground
VCC in (+5 V) 1a+c +5 V supply
VCC in (+12 V) 2a+c +12 V supply
P_SEC out 6c Pulse when second changes, TTL level,
active high, length 200 msec
P_MIN out 8c Pulse when minute changes, TTL level,
active high, length 200 msec
DCF_MARK out 17c DCF77 compatible second marks, TTL level,
active high, length 100/200 msec
100 kHz out 10a 100 kHz frequency output, TTL-level
1 MHz out 11a 1 MHz frequency output, TTL- level
10 MHz out 12a 10 MHz frequency output, TTL- level
F_SYNTH 21c Synthesizer output, TTL- level
F_SYNTH_OD 22c Synthesizer output, Open Drain,
max sink current to GND: 150 mA
F_SYNTH_SIN 23c Synthesizer output, sine-wave 1.5 V eff.
TIME_SYN 19c TTL output, HIGH level if synchronization has been
achieved, LOW level after reset or in case of serious
errors (e.g. antenna faulty)
CAPx 27c, 28c Time capture inputs (TTL), capture on falling slope
COMx TxD out COMx RS-232 transmit data output
COMx RxD in COMx RS-232 receive data input
/RESET in/out 9c RESET signal, Open Drain pulled up to +5 V
SDA, SCL, SCL_EN Internal serial control bus, for extension boards
(reserved) reserved, do not connect
119
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