90 Chapter 2
Block Diagrams
Mnemonics and Connectors
MIS0 Motherboard serial bus master in slave out data signal from all vertical boards to the digital IF
board
MOSI Motherboard serial bus master out slave in data signal from the digital IF board to all vertical
boards
N12 −12 V power supply from the motherboard to the CPU board
N15 −15 V power supply on the motherboard
N5.2 −5.2 V power supply on the motherboard
N6 −6 V power supply from the fan control board to the synthesizer board
NC No connect
OPT_TRIG1 Option trigger signal #1 output from the 4 motherboard option slots to the analog IF board
OPT_TRIG2 Option trigger signal #2 output from the 4 motherboard option slots to the analog IF board
P12 +12 V power supply from the motherboard to the CPU board
P15 +15 V power supply on the motherboard
P15SBY +15 V standby power supply on the motherboard
P32 +32 V power supply on the motherboard
P5.2 +5.2 V power supply on the motherboard
ID0 Motherboard option board slot ID bit 0
ID1 Motherboard option board slot ID bit 1
P9 +9 V power supply on the motherboard
PCMCIA_AD0 not used
PCMCIA_AD1 not used
PCMCIA_AD2 not used
PCMCIA_CLK7 not used
PCMCIA_CS1L not used
PCMCIA_CS2L not used
PCMCIA_D0 to D7 not used
PCMCIA_INTRL not used
PCMCIA_LTCHENL not used
PCMCIA_OEL not used
PCMCIA_RSTL not used
PCMCIA_WEL not used
POWFAILL
PRE_LEVEL_DRIVE LO leveling loop feedback signal from the RF board to the synthesizer board
PROBE_N12.6 Probe power −12.6 V power supply from the fan control board to the front panel interface board
Table 2-1 Mnemonic Descriptions
Mnemonic Description
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