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MODEL NUMBER:
PDI-772HE-IND
Document Number:
PD196-181R3
Individual Input Port Central Power Supply
Page 4 of 12
PDi Communication Systems, Inc. 40 Greenwood Lane Springboro, Ohio 45066 USA PH 1-800-628-9870 FX 937-743-5664
Theory of Operation
The PDI-772HE-IND is designed to power arm-mounted small screen televisions. The unit is typically installed in
a utility or telephone closet some distance from the actual TV location. The supply provides low voltage AC
power and RF cable TV signal along a connecting coax cable to a patient room television. Unique to the PDI-
772HE-IND are individual RF Inputs allowing a dedicated set top satellite box, a cable box, or other similar RF
device to be directed to one specific television.
Please refer to the schematic. AC line voltage is stepped down using an isolation transformer incorporating a
Faraday Shield. The non-regulated secondary output voltage is approximately 28 VAC. Redundant current
protection is provided using a PTC and Circuit Breaker for each output. A simple LC network is used to mix
cable TV RF signal with the 28 VAC power voltage that is then supplied to the output F connector. 10 separate
RF Inputs and 10 corresponding RF/AC Outputs are provided.
Input Voltage
120 VAC Maximum
Input Current
10 A
RF Inputs
10
RF/AC TV Outputs
10
Output Voltage
28VAC
Output Current
3 Amps (NEC Class II Level)
RF Insertion Loss
-1 dbmv or less
RF Passband
10 ~ 1000 Mhz
Waste Heat
110 Watts @ Full Rating
Weight
29 lbs.
Operational Temp.
20~50°C
