380 Keysight N9038A MXE Service Guide
Motherboard & Front Panel
A8 Motherboard Assembly Description
A8 Motherboard Assembly Description
A8 Motherboard Assembly Purpose
The Motherboard is an electrical link between many of the electrical
assemblies in the instrument. The main functions of this PC board include:
— Distribute power
— Control and common signals between all the measurement PC boards
including the A7 Midplane and the Front Panel Assembly
— Circuitry for fan speed control
— 10 MHz Reference distribution
A8 Motherboard Assembly Connections
The connections to and from the A8 Motherboard assembly are as listed in
Table 13-1 and as illustrated in Figure 13-1.
Table 13-1 A8 Motherboard Assembly Connections
Connector Connects to Connector Connects to
J2 A7 Midplane P13 J21 A16 Reference J100
J3 A7 Midplane P3 J31/J32 Option Slot
J4 A7 Midplane P2 J41/J42 Option Slot
J5 A7 Midplane P1 J51/J52 A30 LISN Control J3
J6 Chassis Fan - B3 J61/J62 A24 Conducted Filter J400
J7 Chassis Fan - B2 J71/J72 A21 RF Presel Input J600
J8 Chassis Fan - B1 J81/J82 A22 Radiated Filter J500
J9 A1A2 Front Panel P1 (W8) J91/J92 Option Slot
J11 A3 Digital IF P1 J101 A14 LO Synthesizer J100
J12 A3 Digital IF P2 J111 A15 Front End Controller J100
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