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Maximum cable lengths with 2 to 50 GHz mixers
Agilent Technologies offers 85320A/B Option H50
mixers that operate from 2 to 50 GHz with a single
2.4-mm coaxial connector at the RF input port.
These mixers are popular when operation above
26.5 GHz is required. The 85320A-H50 test mixer
and the 85320B-H50 reference mixer operate from
2 to 18 GHz in fundamental mode, and from 6 to
50 GHz in third-harmonic mode.
Figure 10 shows the RF power levels required for
proper operation with the 85320A/B Option H50
mixers. Table 8 shows the allowed 85381A/C cable
lengths from the LO source to the 85309A, and
from the 85309A to the 85320A/B-H50 test and
reference mixer modules. Table 9 shows the cable
lengths with special low-loss cables.
Table 8. 85381A cable lengths with 85320A/B-H50 mixers
Maximum LO Frequency
Maximum cable length (L1,meters)
bands (GHz)
LO source to 85309A
18
5 (5)
1
16.7
9.5 (5)
13.3
7 (6)
1
Table 9. Special low-loss cable lengths with 85320A/B-H50 mixers, and MA/COM FA29RX cable
Maximum LO Frequency
Maximum cable length (L1,meters)
bands (GHz)
LO source to 85309A
18
10 (10.5)
16.7
11 (11.6)
13.3
13 (12.7)
1. Maximum cable lengths with special high-powered 85309A-H30, H31, H32 units.
16
1
1
1
1
83620B
Synthesized Source
Figure 10. Required RF power levels for Agilent
85320A/B-H50 mixers
Maximum cable length (L2,meters)
85309A to 85320A/B
5 (8.9)
1
5 (9.3)
1
6 (10)
1
Maximum cable length (L2,meters)
85309A to 85320A/B
10 (19)
1
11 (21)
1
12.4 (22.8)
1
P Out = 19 dBm
85309A LO/IF
Distribution Unit
Cable Length L2
P Out = 13 dBm
P Out = 19 dBm
P
= 0-5 dBm
In
Cable Length L2
Cable Length L1
Operating bands
2 to 18 GHz fundamental
18 to 50 GHz 3rd harmonic
2 to 16.7 GHz fundamental
16.7 to 50 GHz 3rd harmonic
2 to 13.3 GHz fundamental
13.3 to 40 GHz 3rd harmonic
Operating bands
2 to 18 GHz fundamental
18 to 50 GHz 3rd harmonic
2 to 16.7 GHz fundamental
6.7 to 50 GHz 3rd harmonic
2 to 13.3 GHz fundamental
13.3 to 40 GHz 3rd harmonic
85320B-H50
Reference
Mixer
P
= 12 dBm
In
85320A-H50
Test Mixer
P In = 12 dBm
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