Keysight N9020A - Page 291

291
L.O. Synthesizer/Reference Troubleshooting
A16 Reference Assembly Description
Table 7-2 A16 Reference Assembly Signals
Signal Description From Location Originates From To Location Purpose
External Reference Input
(1 to 50 MHz,
-5 dBm to +10 dBm)
Input from User n/a A16704 Phase Lock analyzer with
user reference.
10 MHz Out DIF A16J710 10 MHz Reference
A3J14
a
Used as a reference to
other assemblies
throughout the
instrument.
50 MHz Align Signal A16J701 100 MHz VCXO/2 A9, Cal Signal
Input, Input
Attenuator A.
50 MHz Low band
alignment signal.
4800 MHz Align Signal A16J701 2.4 GHz VCXO x 2
or 100 MHz VCXO
x 48
A9, Cal Signal
Input, Input
Attenuator A.
4.8 GHz High band
alignment signal
50 MHz Ecal/300 MHz
Comb Output
A16J705 100 MHz
VCXO/2, 100 MHz
VCXO x 3
A13J6, RF
Front End
Assembly
50 MHz Cal Signal or
300 MHz Comb for
wideband I.F. phase
linearity
100 MHz
1st LO
A16J706 100 MHz
VCXO
A3J14
b
Used as a reference to
other assemblies
throughout the
instrument.
100 MHz
Ref A
A16J707 100 MHz
VCXO
Not used Reserved for future use.
100 MHz
Ref B
A16J716 100 MHz
VCXO
A3J14
c
Frequency reference for
A3 Digital IF (DIF)
assembly. Divided by 10
on DIF to provide 10 MHz
OUT on rear panel.
100 MHz
Ref C
d
A16J707 100 MHz
VCXO
Not used Reserved for future use.
300 MHz LO AIF A16J711 100 MHz
VCXO x 3
A2J300 Used as 3rd LO on A2
Analog IF (AIF) assembly
2.4 GHz Ref
A16J718
d
or
A16J715
e
2.4 GHz VCXO or
100 MHz VCXO x
24
A25J301 Reference for A25
Wideband Digital IF
(WDIF)
4.8 GHz 2nd LO A16J702 2.4 GHz VCXO x 2
or 100 MHz VCXO
x 48
A13J1 2nd LO for A13 Front End
assembly, downconvert
low band 1st IF to 322.5
MHz 2nd IF