Harris DX 25U, Техническое руководство

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COMPONENT FUNCTION/DESCRIPTION
C6 Balances (nulls) Forward Power directional coupler section.
C40 Balances (nulls) Reflected Power directional coupler section.
C29 Ant. VSWR detector, Fine Isolation Adjust. Adjusted for maximum isolation between current sample
and voltage sample.
C15 Ant. VSWR detector, Voltage sample amplitude. Adjusted, along with current sample adjustments, for
the same phase and amplitude at TP6 and TP5 (for a detector null).
C21 BPF VSWR detector, Fine Isolation Adjust. Adjusted for maximum isolation between current sample
and voltage sample.
C16 BPF VSWR detector, Voltage Sample Amplitude, fine adjust. Adjusted, along with current sample
adjustments, for the same phase and amplitude at TP1 and TP10 (for a detector null).
F1 Pr8 Volt supply, if +5 Volt regulator fails (short-circuits).
F2 Protects -8 Volt supply.
L12 Ant. VSWR detector, Current sample, Fine phase. Adjusted, along with voltage sample amplitude at
TP6 and TP5 (for a detector null).
L5, L6, L7, and L8 BPF VSWR detector, Current sample, Fine phase and amplitude, adjustments. When selected with S7,
each is adjusted for the same phase and amplitude at TP1 and TP10 (for a detector null).
P1 and P3 Directional Coupler, Jumper Plugs. Normal position is P1-1 to 3 and P3-1 to 3. Change both jumper
plugs to position 1 to 2 when adjusting Forward Bal (C6) or when calibrating Reflected Power meter.
P2 Directional Coupler Reflected Balance, Coarse adjustment. Jumper plug is set according to Frequency
Determined Components Chart.
R23 Adjusts Bandpass Trip sensitivity.
R24 Adjusts Antenna VSWR TRIP sensitivity.
R7 Adjusts Mod Monitor Sample output level when in MEDIUM power.
R8 Adjusts Mod Monitor Sample output level when in HIGH power.
S4 Depress to check Antenna VSWR Trip comparator and logic.
S8 Normal/Cal Switch. The CAL position is used only during phase angle detector adjustment, when
adjusting isolation.
S5 Press and Hold To Null Each Phase Angle Det
S6 Ant. VSWR detector, Current sample, Coarse phase and amplitude. DIP switch, initially set according
to the Frequency Determined Components Chart.
S3 Depress to check Bandpass Filter VSWR Trip comparator and logic.
S7 BPF VSWR detector, Current sample, Coarse phase and amplitude adjust. DIP switch, initially set
according to the Frequency Determined Components Chart.
S2 BPF VSWR detector, Voltage Sample Amplitude, coarse adjust. Set per Frequency Determined
components chart.
S9 Ant. VSWR detector, Coarse Isolation Adjust. DIP Switch, initially set according to the Frequency
Determined Components Chart.
S1 BPF VSWR detector, Coarse Isolation Adjust. DIP Switch, initially set according to the Frequency
Determined Components Chart.
Table H-1. Output Monitor Board A27,
Controls and Indicators
See Figure H-2
Section H - Output Sample (2A26) & Output Monitor (1A27)
Rev. R: 11-11-96 888-2297-002 H-5
10/14/1999 WARNING: Disconnect primary power prior to servicing.