4-6
690XXB/691XXB MM
Subassembly/RF Component Replaced
Perform the Following
Calibration(s) in Paragraph(s):
A1, A2 Front Panel Assy
None
A3 Reference Loop PCB
4-7
A4 Coarse Loop PCB
4-7
A5 Fine Loop PCB
4-7
A6 Square Wave Generator PCB
None
A7 YIG Loop PCB
None
A9 PIN Control PCB
4-8, 4-9, 4-10, 4-11
A10 ALC PCB
4-8, 4-9, 4-10, 4-11, 4-12
A11 FM PCB
4-13
A12 Analog Instruction PCB
4-7
A13 10 MHz DDS PCB (Option 22)
4-8, 4-9, 4-10, 4-11
A14 YIG, SDM, SQM Driver PCB
4-7, 4-9, 4-10, 4-11
A15 Regulator PCB
None
A16 CPU Interface PCB
None
A17 CPU PCB
4-8 thru 4-13. None, if calibration EEPROM reused.
A18 Power Supply PCB
None
A19 AC Line Conditioner PCB
None
A21 Line Filter/Rectifier PCB
None
A21-1 or A21-2
BNC/Aux I/O Connector PCB
None
YIG-tuned Oscillator
4-7
0.01 to 2 GHz Down Converter Assy
4-8, 4-9, 4-10, 4-11
0.01 to 2.2 GHz Digital Down Converter Assy
(Option 21A)
4-8, 4-9, 4-10, 4-11
Switched Filter Assy
4-8, 4-9, 4-10, 4-11
Switched Doubler Module (SDM)
4-8, 4-9, 4-10, 4-11
Source Quadrupler Module (SQM)
4-8, 4-9, 4-10, 4-11
Forward Coupler
4-8, 4-9, 4-10, 4-11
Directional Coupler
4-8, 4-9, 4-10, 4-11
Step Attenuator (Option 2)
4-8, 4-9, 4-10
Table 4-2.
Calibration Following Subassembly/RF Component Replacement
CALIBRATION FOLLOWING
CALIBRATION
SUBASSEMBLY REPLACEMENT
Summary of Contents for 680 C Series
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