TM 1-1510-225-10 3B-162 Table 3B-98.  System Failure Indications  (Continued) SUBSYSTEM FAILURE INDICATION POSSIBLE EFFECTS Bit 12 Transmit A Bus Data Loader has failed to transmit data on the 1553 A bus. Bit 13 Fault B Bus 1553   B   data   is   corrupted;   1553   data   transmission terminated. Bit 14 Fault A Bus 1553   A  data  is  corrupted;  1553  data  transmission terminated. Bit 15 Data Loader Subsystem Status Data   Loader   may   be   inoperative   or   have   impaired capability. Bit 16 MIL-STD -1553 Terminal Status Data  Loader  may  be  unable  to  communicate  on  the 1553 bus. BUS MIL-STD -1553B Bus Status NGO-A:  Data Loader is not responding on the A bus. NGO-B:  Data Loader is not responding on the B bus. NGO-T:      Data   Loader   is   not   responding   on   either 1553 bus. GPS Receiver Status RPU GPS Receiver CPU Status GPS  CPU  may  cease  to  function  or  have  impaired capability. BATT GPS Receiver Battery Status GPS Battery Voltage is low.  Almanac data could be lost on power-down. ADC Status ADC ADC Subsystem Status ADC may be inoperative or have impaired capability. V/UHF Status Bit 1 Power Supply Ready Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability. Bit 2 High    Power    Amp    (HPA)    Low Voltage Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability. Bit 3 HPA Temperature Fault V/UHF   radio   may   be   inoperative   or   have  impaired capability. Bit 4 HPA    Voltage    Standing    Wave Radio Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability. Bit 5 HPA Protection Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability. Bit 6 Power Amp Low Power Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability. Bit 7 Synthesizer Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability. Bit 8 Antenna Converter Fault V/UHF   radio   receive   or   transmit   capability   may   be inoperative or have impaired capability. Bit 9 Command/Compare Fault V/UHF  radio  may  not  respond  to  control  commands on the 1553 bus.  Radio may be operative, but control may be unavailable. Bit 10 Not Used Bit 11 Applique Fault V/UHF   radio   may   be   inoperative   or   have   impaired capability.