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Selecting the system
Figure 3 will help you select either an Agilent
85301B or 85301C antenna measurement system,
depending on your range type and the required
microwave performance. If you select an 85301B
system, you will configure the receive site with an
Require measurements
Indoor range
>50 GHz now or
in the future?
Outdoor range
Figure 3. Selecting an antenna measurement system
Table 3. Performance of an 85301B system (with 85310A distributed frequency converter)
Option H20 mixers
Specification
Sensitivity
2
(dBm)
Compression level
4
(dBm)
Dynamic range
5
(dB)
Channel isolation
6
(dB)
Typical RF input match (dB)
Table 4. Performance of an 85301C system (with 8511A/B frequency converters)
Specification
Maximum output power
7
(dBm)
83630B
8
83650B
8
Sensitivity
2
(dBm) (S/N = 1,0 avgs), 8511A [B]
Sensitivity
2
(dBm) (S/N = 1,128 avgs), 8511A [B]
Dynamic range (dB, 0 averages) 8511A [B]
Compression level
4
(dBm)
Channel isolation
6
(dB, ref to test), 8511A [B]
Return loss (dB, RF input)
Min. phase-lock power
9
(dBm), 8511A [B]
1. Performance from 1 to 2 GHz is typical.
2. Sensitivity is defined as signal = noise, IF bandwidth = 10 kHz. Averaging will improve sensitivity by 10 log (number of averages).
3. Typical performance.
4. RF level for 0.1 dB compression.
5. Broadband dynamic range is the measured difference between the compression level and the average noise floor. Achievable dynamic range for CW measurements is 2 to 3 dB
better.
6. Channel isolation is the coherent RF leakage from the reference channel to the test channel.
7. Cable loss can be determined from Figures 12 and 13.
8. Frequency resolution for the 83630B and 83650B = 1 Hz. (with Option 008)
9. Minimum phase-lock power is the typical minimum RF power at the a1 or a2 input to achieve phase-lock.
8
Need to measure signals
No
<-115 dBm (0.045 to 26.5 GHz) or
<-100 dBm (26.5 to 50 GHz)?
Yes
85320A/B
3
0.1 to 3 GHz
1 to 2 GHz
1
-107
-80
-21
-24
86
56
100
100
8
8
0.045 to 8 GHz
+10
+10
-119
80 [85]
-40 [-41]
85310A distributed frequency converter (mixer-
based). If you choose an 85301C system, you will
configure the receive site with either an 8511A
(45 MHz to 26.5 GHz) or 8511B (45 MHz to 50 GHz)
frequency converter (harmonic sampler-based).
System performance with these converters is
shown in Tables 3 and 4.
No
antenna-under-test?
Yes
85320A/B
standard mixers
2 to 18 GHz
6 to 26.5 GHz
-113
-24
89
100
8
8 to 20 GHz
+10
+10
-98
-98
-119
88
88
-10
-10
80 [85]
17
15
-38[-39]
No
Require mixers at
*85301B can also be used;
will provide greater sensitivity
Yes
Select 85301C system*
(uses 8511A/B frequency converter)
Select 85301B system
(uses 85310A frequency converter)
85320A/B
Option H50 mixers
2 to 18 GHz
-96
-110
-15
-24
81
86
100
100
8
5
20 to 26.5 GHz
26.5 to 40 GHz
+3
—
+4
+3
-94 [-89]
[-89]
-115 [-110]
[-110]
79 [74]
[74]
-15
-15
80 [75]
[75]
9
9
-35 [-32]
[-32]
3
6 to 26.5 GHz
-95
-27
68
100
5
40 to 50 GHz
—
0
[-87]
[-108]
[68]
-19
[70]
7
[-30]
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