210 Chapter 9
Block Diagrams
Signal Mnemonics
FP_RED1 Flat panel display red 1 signal from the CPU board to the front panel interface board
FP_RED2 Flat panel display red 2 signal from the CPU board to the front panel interface board
FP_RED3 Flat panel display red 3 (MSB) signal from the CPU board to the front panel interface board
FP_VSYNCL Flat panel display vertical sync signal from the CPU board to the front panel interface board
FP_W_RL Front panel bus read/write signal from the CPU board to the front panel interface board
GATE_ARM Gate arm signal from the analog IF board to the digital IF board
GATE_TRIG Gate trigger signal from the analog IF board to the digital IF board
HPUP High = power up +5.2 V when instrument is turned on
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
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
PROBE_N12.6 Probe power −12.6 V power supply from the fan control board to the front panel interface board
PROBE_P15 Probe power +15 V power supply from the fan control board to the front panel interface board
SR_H Differential ECL sample rate clock from the analog IF board to the digital IF board
SR_L Differential ECL sample rate clock from the analog IF board to the digital IF board
SWEEP_ARM Sweep arm signal from the analog IF board to the digital IF board
SWEEP_TRIG Sweep trigger signal from the analog IF board to the digital IF board
TRIG1 Trigger #1 output from the digital IF assembly to all vertical assemblies
TRIG2 Trigger #2 output from the digital IF assembly to all vertical assemblies
VCC +5.2 V digital power supply
VDL +3.4 V digital power supply
VFAN+ Cooling fans positive power supply from the fan control board to the fan connectors on the
motherboard
VFAN- Cooling fans negative power supply from the fan control board to the fan connectors on the
motherboard
Table 9-1 Mnemonic Descriptions
Mnemonic Description
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