Rf Frequency Sweep - HP 8642A Operating Manual

Model 8 6 4 2 A / B
Operation
RF FREQUENCY SWEEP
Description Two types of frequency sweep are available. Stepped Frequency Sweep sweeps from a
start end-point to a stop end-point in linearly spaced, incremental steps. Phase
Continuous Frequency Sweep (Special Function 123) sweeps from a start end-point to a
stop end-point in a linear, phase continuous manner.
Sweep step size is automatically selected based on the frequency span (which is the
absolute value of the start frequency minus the stop frequency) and the sweep time.
Although step size for the Stepped Frequency Sweep cannot be directly set, this operating
instruction provides ways to calculate a sweep time io enable you to select a particular
step size or number of steps.
Table 3 - 1 2
Electrical Characteristics
Digitally Stepped
Frequency Sweep
Range
Time
Phase Continuous
Frequency Sweep
Maximum Sweep Span
Time
X Axis Output
Z Axis Output
R F Frequency Sweep Operating Characteristics
Performance Limits
0.100000 to 1057.500000 MHz
1
0.100000 to 2115.000000 MHz
1
275 ms minimum
999s maximum
800.000 kHz (8642B only)
400.000 kHz
200.000 kHz
100.000 kHz
50.000 kHz
2
25.000 kHz
2
12.500 kHz
2
6.250 kHz
2
3.125 kHz
2
25.000 kHz
2
400.000 kHz
5 ms minimum
999s maximum
Maximum and minimum sweep
times are also dependent on
the sweep span and carrier
frequency.
0 to 10 Vdc
TTL Positive True
1
In AUTO sweep mode, it is not possible to set start and stop end-points if one
with a second end-point greater than 132.187500 MHz (band 6). Also, it is not po
(8642B only).
2
Maximum end-point separation may be increased up to that shown for the H
than the span shown here. HET band can also be selected with Special Fun<
3
The HET Band.
4
Buffer this output in order to use the Z-axis output with a plotter for pen lift
Conditions
8642A
8642B
End-points can be outside the
band but (Start Frequency +
Stop Frequency) -r 2 must be
within the band.
1057.500001 to 2115.000000 MHz
528.750001 to 1057.500000 MHz
264.375001 to 528.750000 MHz
132.187501 to 264.375000 MHz
66.093751 to 132.187500 MHz
33.046876 to 66.093750 MHz
16.523438 to 33.046875 MHz
8.261719 to 16.523437 MHz
4.130860 to 8.261718 MHz
0.100000 to 4.130859 MHz
0.100000 to 132.187500 MHz
3
±10%
For crt display blanking
during retrace
4
end-point is less than 4.130860 MHz (band 2)
ssible to set a sweep across 1057.500000 MHz
ET band by selecting a frequency span larger
Mion 8.
3-49