General Information 11
General Information
Backup Power
Power consumption on the back-up battery is 5 mW (typical) and 50 mW
(maximum) with the external power supplies. The acceptable battery backup
voltage range is 2.5 to 3.5 VDC.
08 CTSB RS-232 Port B clear to send
09 TXDB RS-232 Port B transmit data
10 RTSB RS-232 Port B request to send
11 RXDB RS-232 Port B receive data
12 TXDSCI Synchronous Communication Interface transmit data
13 +5V +5 VDC input
14 +5V +5 VDC input
15 BATT_IN 2.5-3.6 volt battery backup for memory and real-time clock
16 COR_LED_RED External LED control output, differential corrections status, red (3.3 Volts
through 100
W)
17 MAN_RES Connect to ground for manual hardware reset
18 1PPS_OUT 1PPS TTL output synchronized to GPS time
19 GND Chassis common ground
20 GND Chassis common ground
21 GPS_LED_RED
External LED control output, GPS status red, (3.3 Volts through 100
W)
22 GPS_LED_GRN
External LED control output, GPS status green, (3.3 Volts through 100
W)
23 COR_LED_GRN External LED control output, differential corrections status, green
(3.3 Volts through 100
W)
24 GND Chassis common ground
25 EXT_LNA_PWR +5 VDC Power supply input to external antenna LNA (use only on 3.3V
versions)
26 GND Chassis common ground
27 PHOTO_IN Photogrammetry pulse input
28 RXDSCI Synchronous Communication Interface receive data
29 CLKSCI Synchronous Communication Interface clock
30 RXDC RS-232 Port C receive data
Table 1.5. J301 Pin Assignments
Pin Code Description
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