
5/ Tuning Characteristics of Various VCO Source Options
VCO Source
HP S662/3A
EFC
DCFM
HP 8642A/B
HP 8640B
HP 8656B
Other Signal Generator
DCFM Calibrated
for±1V
10 MHz Source A
Direct
Multiplied
As a Timebase;
To HP 8662/3A
To otner synthesized
signal generators
10 MHz Source B
Direct
Multiplied
As a Timebase:
To HP8662/3A
To other synthesized
signal generators
350-500 MHz Source
Other User VCO Source
Carrier
Freq.
"o
>>0
'-'(1
"r>
'I'll
Tuning
Constant
(Hz/V)
5E-9xi!„
FM Deviation
FM Deviation
FM Deviation
FM Deviation
FM Deviation
10
1E-6xi;„
1E-6xv„
1 E - 6 x v„
100
10
E
- 6 x iv
10 E - 6 x v
0
10 E - 6 x v
a
12
E
+ 6
Estimated
within a
factor of 2
Center
Voltage
(V)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-10
to
+10
Voltage
Tuning
Range (±V)
10
10
10
10
10
10
10
10
10E + 9 +v„
1 E 4- 6 x PTR* + v
0
!0
10
1 E + 9rt;
D
,
(up to 2.5V max.)
100 E + 3 x PTR* + v
a
2
See Graph 8
Input
Resistance
(ohms)
1 E + 6
1
k (8662)
600 (8663)
600
600
600
Rin
1E + 6
1
E
+ 6
1 E + 6
1 E + 6
IEt6
1
E
+ 6
1
E
+ 6
!
E
+ 6
1
E
+ 6
1
E
+ 6
Tuning
Calibration
Method
Measure
Compute
Compute
Compute
Compute
Compute
Compute
Measure
Measure
Measure
Measure
Limited PTR flue to PLL BW limitations.
Description
This table lists the tuning parameters for several VCO source options.
(Refer to
Instr.
Params
in Chapter 2, Measurement Definitions, for further
information on tuning sources.)
7-20 Quick Reference
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