Barrett 950 - Page 34

BARRETT 900 SERIES TRANSCEIVERS
Voltage table
Location Drawing No. Supply Test Voltage Voltage Source PCB
rail point Receive Transmit and
name regulator or
transistor
nominal nominal source
PA 900S18##.PCB +10 - +10V +/- +10V +/- PA - U5
0.2V 0.2V
PA 900S18##.PCB +5 - +5V +/- +5V +/- PA - U2
0.2V 0.2V
RF/Audio 900S15##.PCB +14 - +13.8 V +13.8 V PA - external
900S27##.PCB nominal nominal source
RF/Audio 900S15##.PCB +10 - +10V +/- +10V +/- PA - U5
900S27##.PCB 0.2V 0.2V
RF/Audio 900S15##.PCB +5 - +5V +/- +5V +/- PA - U2
900S27##.PCB 0.2V 0.2V
RF/Audio 900S15##.PCB BIAS TP12 +5V +/- +5V +/- RF/Audio - U5:B
900S27##.PCB 0.2V 0.2V
Micro. 900S14##.PCB +14 - +13.8 V +13.8 V PA -external
nominal nominal source
Micro. 900S14##.PCB +10 - +10V +/- +10V +/- PA - U5
0.2V 0.2V
Micro. 900S14##.PCB +5 TP14 +5V +/- +5V +/- PA - U2
0.2V 0.2V
Micro. 900S14##.PCB +5D TP4 +5V +/- +5V +/- Micro - U19*
0.2V 0.2V
Micro. 900S14##.PCB +5VA TP3 +5V +/- +5V +/- Micro -U20*
0.2V 0.2V
Fr. Panel 900S16##.PCB +14 - +13.8 V +13.8 V PA - via RF/Audio
nominal nominal
Fr. Panel 900S16##.PCB +5 - +5V +/- +5V +/- Fr. Panel - Q6
0.2V 0.2V
Rem. Head 900S17##.PCB +14 - +13.8 V +13.8 V PA - via
nominal nominal RF/Audio
Rem. Head 900S17##.PCB +10 - +10V +/- +10V +/- Rem. Head - U7
0.2V 0.2V
Rem. Head 900S17##.PCB +5 - +5V +/- +5V +/- Rem. Head -U6
0.2V 0.2V
PA 900S18##.PCB 14 TP7 +13.8 V +13.8 V external
PA 900S18##.PCB +5TX - 0V +5V +/- 0.2V PA Q16
PA 900S18##.PCB +10TX - 0V +10V +/- 0.2V PA - Q8
PA 900S18##.PCB +12TX - 0V +12V nominal PA - Q9
Note :- ## denotes the rev number, this may change
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