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FM
MAIN
BIAS
Modulator
Control
Switch
Control
>+17 dBm
8.4-20 GHz
2-8.4 GHz
>+4dBm
0.5 - 40 GHz
110 dB
Step
Attenuator
(Option)
Directional
Coupler
Control
3.3 GHz LPF
5.5 GHz LPF
8.4 GHz LPF
13.5 GHz LPF
J5
J3
J1
Sampler
(-20 dBm
to
-27dBm)
J6
J2
Level
Control
RF Output
2-20 GHz
YIG Oscillator
Switch
Control
Bias
20 - 40 GHz
>+8.5 dBm
Switched Filter Assy. - D25015 (Standard)
- D26350 (Option 15B)
0.5 - 2.2 GHz
8.5 GHz LPF
J2
RF Path for 20 GHz Models
20 - 25 GHz BPF
25 - 32 GHz BPF
32 - 40 GHz BPF
x2
>+15 dBm (Std.)
20 GHz LPF
>+20 dBm (Opt. 15B)
Switched Doubler Module - D28535
(40 GHz Models)
J1
Switch
Control
Bias
20 - 26.5 GHz
>+8.5 dBm
J2
20 - 26.5 GHz BPF
x2
Switched Doubler Module - ND40843
(26.5 GHz Models)
J1
Modulator
J7
Pulse
Level
Control
2000 -
4400 MHz
J3
>+16 dBm
Pulse
J5
Digital Down Converter Assy. - D27370
J2
2200 MHz LPF
1000 MHz LPF
1400 MHz LPF
700 MHz LPF
÷
÷
2
2
J1
Modulator
Control
Switch
Control
J4
NOTE
Switched Doubler Module not installed
in Models 68245B/68345B.
FUNCTIONAL RF DECK
DESCRIPTION ASSEMBLIES
682XXB/683XXB MM 2-27
Figure 2-6. Block Diagram of the RF Deck Assembly for all
£40 GHz 682X5B/683X5B Models