Arbiter Systems 120A, User Manual

Page: 13 / 35

2.2.3 Communication Ports
USB 2.0 micro USB connector emulates serial com port with a 115200 baud rate, 1 stop bit, 8 data bits and no
parity. Used for configuration and firmware updates.
RS-232 Port communications port on 3 pins of the pluggable terminal strip (Txd, Rxd, Gnd). Used for configuration
and serial broadcast signals.
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200 to 115200 baud rates
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7 or 8 data bits
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1 or 2 stop bits
•
Even, Odd or None parity Used for configuration and serial broadcast signals.
2.2.4 Outputs
There are two logic level (+5 Vdc) programmable pulse outputs that can be configured to one of the signals listed
below with the choice between UTC or Local time and low (50 ohm) or high drive capability.
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IRIG-B
•
IRIG-B with C37.118 (2011) extensions
•
DCF77
•
Pulse Per Day (PPD)
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Pulse Per Hour (PPH)
•
Pulse Per Second (PPS)
2.2.5 Relay
Form A (SPST-N)), 400 V peak ac/dc. 20-40 ohms on resistance.
Signal: Out of Lock, Fault, PPM, PPH, PPD, ST
Fail Safe: In Unlocked/Fault state (power off), contacts are open.
2.2.6 Reset Function
There is a recessed reset button on right of panel with USB port and LED. The reset button has two functions:
1. Restart the Model 120A: Press the button momentarily to restart.
2. Reset the factory defaults: Press and hold the reset button in until the 4 LEDs next to the output
connector start blinking to reset.
Factory defaults:
Login
User: admin
Password: password
Timeout: 60 minutes
GNSS
Satellites: GPS GLONASS Galileo
Antenna Delay: 30 nS
Out1 (Programmable Pulse)
Signal: IRIG-B unmodulated
C37.118: On
Time reference: UTC
Drive level: Low (50 ohms)
Out2
Signal: IRIG-B unmodulated
C37.118: On
Time reference: UTC
Drive level: Low (50 ohms)
Relay
Signal: Out of lock