5-44 Keysight N5227B Service Guide
Theory of Operation
Digital Processing and Digital Control Group Operation
5-
Front Panel Subgroup
The front panel subgroup contains the following assemblies:
—
A1 Front Panel Interface Board
—
—
—
A1 Front Panel Interface Board
The A1 front panel interface board detects and decodes user inputs from the
keypad assembly and front panel knob, and transmits them to the A21 CPU
board by way of the A18 system motherboard. It also decodes video data from
the video processor on the A21 CPU board and supplies this to the A3 display
assembly. Power from the power bus on the A18 system motherboard is
buffered and routed to the keypad assembly and the A3 display assembly. All
data and power signals are routed through a single cable connector to the A18
system motherboard.
The A1 front panel interface board also includes a speaker that emits the audio
signals received from the A21 CPU board.
A2 USB Board
This board provides four universal serial bus (USB) jacks that are industry
standard 4-pin connectors allowing multiple USB devices to be connected to
the analyzer’s front panel.
A3 Display Assembly
The A3 display assembly contains a 10-inch LCD with associated drive circuitry
and backlight inverter. Two cables between the A3 display assembly and the
A1 front panel interface board provide all necessary power and data for normal
operation. The two cables are:
7.
A cable to the inverter that supplies buffered power.
8.
A cable to the display circuitry that supplies decoded data from the video
processor on the A21 CPU board and the necessary drive circuit power.
The video data received from the A21 CPU board includes the following:
• digital TTL horizontal sync
• digital TTL red video
• blanking
• digital TTL vertical sync
• digital TTL green video
• data clock
• digital TTL blue video
Содержание N5227B
Страница 26: ...2 8 Keysight N5227B Service Guide General Product Information Keysight Support Services and Assistance 2...
Страница 176: ...5 40 Keysight N5227B Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 17 4 Port Receiver Group...
Страница 177: ...Keysight N5227B Service Guide 5 41 Theory of Operation Receiver Group Operation Figure 5 18 2 Port Receiver Group...
Страница 184: ...5 48 Keysight N5227B Service Guide Theory of Operation Power Supply Group Operation 5...
Страница 189: ...Keysight N5227B Service Guide 6 5 Replaceable Parts Rebuilt Exchange Assemblies Figure 6 1 Module Exchange Procedure...
Страница 203: ...Keysight N5227B Service Guide 6 19 Replaceable Parts Replaceable Parts Listings Figure 6 6 Top Assemblies All Options...
Страница 217: ...Keysight N5227B Service Guide 6 33 Replaceable Parts Replaceable Parts Listings Figure 6 12 Bottom RF Cables Option 201...
Страница 221: ...Keysight N5227B Service Guide 6 37 Replaceable Parts Replaceable Parts Listings Figure 6 14 Bottom Assemblies Option 205...
Страница 237: ...Keysight N5227B Service Guide 6 53 Replaceable Parts Replaceable Parts Listings Figure 6 21 Bottom RF Cables Option 219...
Страница 241: ...Keysight N5227B Service Guide 6 57 Replaceable Parts Replaceable Parts Listings Figure 6 23 Bottom Assemblies Option 220...
Страница 255: ...Keysight N5227B Service Guide 6 71 Replaceable Parts Replaceable Parts Listings Figure 6 29 Bottom Assemblies Option 401...
Страница 263: ...Keysight N5227B Service Guide 6 79 Replaceable Parts Replaceable Parts Listings Figure 6 32 Bottom Assemblies Option 405...
Страница 267: ...Keysight N5227B Service Guide 6 83 Replaceable Parts Replaceable Parts Listings Figure 6 33 Bottom RF Cables Option 405...
Страница 271: ...Keysight N5227B Service Guide 6 87 Replaceable Parts Replaceable Parts Listings Figure 6 35 Bottom Assemblies Option 410...
Страница 279: ...Keysight N5227B Service Guide 6 95 Replaceable Parts Replaceable Parts Listings Figure 6 38 Bottom Assemblies Option 419...
Страница 318: ...6 134 Keysight N5227B Service Guide Replaceable Parts Replaceable Parts Listings 6...