Keysight Technologies N5244/5B Service Manual page 242

Replaceable Parts
Replaceable Parts Listings
Table 6-1 Part Number Listing by Reference Designator (Continued)
Reference Description
Designator
A4 13.5 GHz source 1 synthesizer board (Applies to PNA
models with serial numbers <6021 only)
A5 26.5 GHz source board 1
A6 Not used
A7 Doubler 1 board
A8 Doubler 2 board
A9 Noise receiver board
A10 26.5 GHz source board 2
A11 Not used
A12 Doubler 3 board
A13 Doubler 4 board
A14 Frequency reference board (Applies to PNA models with
serial numbers <6021 only)
A15 13.5 GHz (LO) synthesizer board (Applies to PNA models
with serial numbers <6021 only)
A15 (DDS) Direct digital synthesizer (DDS) assembly (Applies to PNA
models with serial numbers
A16 Signal processing ADC module (SPAM) board
A17 13.5 GHz source 2 synthesizer board (Applies to PNA
models with serial numbers <6021 only)
A18 System motherboard
A19 Midplane board
A20 Power supply
A21 CPU board
A22 GPIB board
A23 Testset motherboard (2- and 4-port with Option 029 only)
A24 IF multiplexer board
LO Multiplier/amplifier 26.5 (HMA26.5)
a
A25
Splitter
a
A26
Mixer Brick 1
b
A27
6-8
≥
6021 only)
Location
"Top Assemblies and Cables, All
Options:" on page 6-11
Your option set determines which
assemblies are in your PNA. Refer to
"Bottom Assemblies and Cables by
Option Set:" in Table 6-2 on
page 6-11
Keysight N5244B/45B Service Guide