A8 Fractional-N Synthesizer Board - Agilent Technologies E8362A Service Manual

PNA Series Microwave Network Analyzers
E8362A, E8363A, E8364A
Table 5-2 Subsweep Frequencies
1 1 0.053 to 0.756 0.053 to 0.756 0.053 to 0.756 0.045 to 0.748 0.045 to 0.748
2 1 0.756 to 1.508 0.756 to 1.508 0.756 to 1.508 0.748 to 1.500 0.748 to 1.500
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15 1
16 3
17 3
18 3
19 3
20 3
21 3
22 3
23 3
24 3
25 3
a. Applies only to the E8363A and E8364A; this assembly is not included in the E8362A.

A8 Fractional-N Synthesizer Board

The A8 fractional-N synthesizer board uses the 5 MHz reference signal from the A10
frequency reference board to tune two VCO circuits: one that sweeps from 1500 to
3000 MHz and one that is set to a CW frequency of 2250 MHz. In band 1, these two signals
are heterodyned to produce the output frequencies listed in
2, the output of the swept VCO is passed through a divide-by-2 circuit to produce the
output frequencies listed in
directly to the synthesizer output.
Service Guide E8364-90001
A8 Frac-N A17
Synthesizer LOMA 10
Frequency Frequency
(GHz) (GHz)
1.50 to 3.00 1.50 to 3.00
1.50 to 1.90 3.00 to 3.80
1.90 to 2.25 3.80 to 4.50
2.25 to 2.40 4.50 to 4.80
2.40 to 3.00 4.80 to 6.00
1.50 to 1.60 6.00 to 6.40
1.60 to 1.90 6.40 to 7.60
1.90 to 2.50 7.60 to 10.00
2.50 to 3.00 5.00 to 6.00 10.00 to 12.00 10.00 to 12.00 10.00 to 12.00
1.50 to 1.60 6.00 to 6.40 12.00 to 12.80 12.00 to 12.80 12.00 to 12.80
1.60 to 1.90 6.40 to 7.60 12.80 to 15.20 12.80 to 15.20 12.80 to 15.20
1.90 to 2.00 7.60 to 8.00 15.20 to 16.00 15.20 to 16.00 15.20 to 16.00
2.00 to 2.50 8.00 to 10.00 16.00 to 20.00 16.00 to 20.00 16.00 to 20.00
1.67 to 1.90 6.67 to 7.60
1.90 to 2.13 7.60 to 8.53
2.13 to 2.50 8.53 to 10.00
2.50 to 2.67 5.00 to 5.33 10.00 to 10.67 15.00 to 16.00 30.00 to 32.00
2.67 to 3.00 5.33 to 6.00 10.67 to 12.00 16.00 to 18.00 32.00 to 36.00
1.50 to 1.60 6.00 to 6.40 12.00 to 12.80 18.00 to 19.20 36.00 to 38.40
1.60 to 1.67 6.40 to 6.67 12.80 to 13.33 19.20 to 20.00 38.40 to 40.00
1.67 to 1.90 6.67 to 7.60 13.33 to 15.20 10.00 to 11.40 40.00 to 45.60
1.90 to 2.00 7.60 to 8.00 15.20 to 16.00 11.40 to 12.00 45.60 to 48.00
2.00 to 2.08 8.00 to 8.33 16.00 to 16.67 12.00 to 12.50 48.00 to 50.00
Table 5-2. In all other bands, the swept VCO signal is sent
A20 LODA A12
(L.O.) Source 20
Frequency Frequency
(GHz) (GHz)
1.50 to 3.00 1.50 to 3.00
3.00 to 3.80 3.00 to 3.80
3.80 to 4.50 3.80 to 4.50
4.50 to 4.80 4.50 to 4.80
4.80 to 6.00 4.80 to 6.00
6.00 to 6.40 6.00 to 6.40
6.40 to 7.60 6.40 to 7.60
7.60 to 10.00 7.60 to 10.00
6.67 to 7.60 10.00 to 11.40 20.00 to 22.80
7.60 to 8.53 11.40 to 12.80 22.80 to 25.60
8.53 to 10.00 12.80 to 15.00 25.60 to 30.00
Table 5-2 on page
Theory of Operation
Source Group Operation
A21
SOMA 50
Frequency
a
(GHz)
1.50 to 3.00
3.00 to 3.80
3.80 to 4.50
4.50 to 4.80
4.80 to 6.00
6.00 to 6.40
6.40 to 7.60
7.60 to 10.00
5-7. In band
5- 7