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16
Reference Graphs and Tables
8643A Frequency Limits
Table 56 8643A frequency limits
Note: Special Function 120 must be enabled for DCFM
Model
Option
Band Minimum
Number
(MHz)
8643A
002
1030
8643A
002
515
8643A
Standard
515
8643A
Both
257.5
8643A
Both
128.75
8643A
Both
64.375
8643A
Both
32.1875
8643A
Both
16.09375
8643A
Both
8.046875
8643A
Both
4.0234375
8643A
Both
2.01171875
8643A
Both
1.005859375
8643A
Both
0.5029296875
8643A
Both
0.25146484375
1 Takes into account limited tuning resolution available in linear FM (Special Function 120, refer to
page 373.
T
2
he 8643A defaults to Mode 2 operation.
3 Wideband FM: Use Special Function 125 (refer to
8643A mode keys
• The [Mode 1] key provides the maximum FM deviation and minimum RF
• The [Mode 2] key provides a median range of FM deviation and RF output
372
Band Maximum (MHz) Mode 2
2060
1029.99999999
1030
514.99999999
257.49999999
128.74999999
64.37499999
32.18749999
16.09374999
8.04687499
4.02343749
2.01171874
1.005859365
0.5029296775
"How to access special functions"
output switching time. Noise level is highest in this mode, as shown in
Table 57
on page 373.
switching time, as shown in
Mode 2 operation.
Minimum Recommended PTR (Peak Tune Range)
PTR =FM Deviation x VTR
2
2000000
1000000
1000000
500000
250000
125000
62500
31200
15600
7810
3900
1950
976
488
"How to access special functions"
on page 373.
Table 57
on page 373. The 8643A defaults to
1
3
Mode 1
20000000
10000000
10000000
5000000
2500000
1250000
625000
312000
156000
78100
39000
19500
9760
4880
on
Agilent E5505A User's Guide
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