A4, A15, And A17 13.5 Ghz Synthesizer Boards - Keysight Technologies N5224/5A Service Manual

Theory of Operation
Synthesized Source Group Operation
Band
Mixer
Brick
L.O.
A15
Harm
Synthesizer
.
Frequency (GHz)
Nmbr
.
(N)
22 1 12.0037 to 13.2537
23 3 8.8358 to 9.0051
24 3 9.0051 to 10.6691
25 3 10.6691 to 13.5025
26 3 6.7512 to 7.1106
27 3 7.1106 to 7.2512
28 3 7.2512 to 7.7012
29 3 7.7012 to 8.0012
30 3 8.0012 to 8.3346

A4, A15, and A17 13.5 GHz Synthesizer Boards

The A17 13.5 GHz synthesizer board is included only on 4-port models.
The A4, A15, and A17 13.5 GHz synthesizer boards use the 50 MHz reference
signal from the A14 frequency reference board to tune a VCO circuit that
sweeps from 2 GHz to 4 GHz.
Refer to
here.
In bands 2-10, the output of the swept VCO is passed directly or through a
divide-by-2, 4, or 8 circuit to produce the output frequencies as listed in
5-3.
In band 6, the output of the swept VCO is passed through a divide-by-4 circuit
and then sent to a Direct Digital Synthesizer to produce the output frequencies
for bands 2-4 as listed in
Keysight N5224A/25A Service Guide
A25
HMA26.5
Frequency (GHz)
24.0074 to 26.5074
8.8358 to 9.0051
9.0051 to 10.6691
10.6691 to 13.5025
13.5025 to 14.2211
14.2211 to 14.5025
14.5025 to 15.4025
15.4025 to 16.0025
16.0025 to 16.6691
Table 5-3 and Figure 5-3
Table
A4/A17 A5/A10
Synthesizer Source
Frequency Frequency
(GHz) (GHz)
12.000 to 12.000 to
13.250 13.250
13.250 to 13.250 to
13.504 13.504
6.752 to 8.000 13.504 to
16.000
8.000 to 10.125 16.000 to
20.250
10.125 to 20.250 to
10.664 21.328
10.664 to 21.328 to
10.875 21.750
10.875 to 21.750 to
11.550 23.100
11.550 to 23.100 to
12.000 24.000
12.000 to 24.000 to
12.500 25.000
for band numbers and frequencies discussed
5-3.
A7/A8/A12/A1
3 50GHz
Doubler
Frequency
(GHz)
24.000 to
26.500
26.500 to
27.008
27.008 to
32.000
32.000 to
40.500
40.500 to
42.656
42.656 to
43.500
43.500 to
46.200
46.200 to
48.000
48.000 to
50.000
Table
5-11