SDI DA-1G, Operating Manual, Page: 7 / 15

2.0 Safety and Preparation for Use
Page 3
The power return (pin 4) is NOT connected to the instrument case ground internally,
however both ground connections pin 4 and pin 6 are available at the DC power connector
and may be connected together at this point.
Requirements for the external DC power supply
The following specifications should be used to ensure optimum performance:
DC Supply voltage
+12 to +36 VDC, 2 Amps
Line regulation +/- 0.05% for a 10% line change
Load regulation +/- 0.05% for a 50% load change
Output ripple < 5 mV peak-to-peak
Pin configuration Same as RM12BRD-6PH(71) DC connector on the back panel
Verify that the connector from the DC power supply to be used has the correct pin
configuration mentioned above. Do not apply AC voltage to the DC power connector.
Failure to follow these directions may cause injury or death to personnel, cause irreparable
damage to the instrument and voids all warranties.
If you provide DC power to the unit, detaching the DC power cord is the only option of
disconnecting the unit from the DC mains supply. Make sure you have access to the rear
panel or provide an external accessible DC disconnect means for the instrument.
2.2 Instrument Safety and Preparation for Use
The DA-1G is designed to distribute RF signals with a frequency of 700 to 1100 MHz.
Output levels below +7 dBm will trigger a fault condition which can be monitored from the
front panel. Input signals must be kept below +20 dBm as greater power levels will damage
the unit and void all warranties.
Absolute Maximum Ratings
Input RF Power +20 dBm Maximum
Reverse RF Power +20 dBm Maximum
Voltage at the RF Input +50 VDC Maximum
Voltage at the RF Output +50 VDC Maximum
Input DC Supply Voltage + 36 VDC
Storage Temperature -10 to +75 ºC
Operation Environment 0 to +50 ºC