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VJ1000HP
32 / 40
USER MANUAL
Rev. 4.0 - 26/02/01
N.B. Several attempts may be necessary. At least 60 seconds should be allowed
inbetween attempts to allow an automatic reset.
3)
CALIBRATION OF THE GRID CURRENT (IG) ALARM THRESHOLD
a)
Connect the unit to the line supply and connect a dummy load (50Ohms 1.5KW).
b)
Switch the ST.BY. switch (15 Fig.1) to ST.BY.
c)
Wait for the fan to build up pressure.
d)
Perform the SETUP 3 procedure and steps required to calibrate the grid current IG
(paragraph 5.5).
e)
Adjust the reading (regulating the supply) to 40 mA.
f)
Adjust trimmer R21 until the IG protection is activated i.e. when the IG indicator (12
Fig.1) comes on.
g)
Reduce the indicated current to 30 mA.
h)
Wait for the automatic protection cycle to complete and repeat step e) to verify the
correct alarm threshold (40 mA).
8.3
Calibration of the PWR Meter (REF)
Perform the calibration procedure for the V.S.W.R. protection upto step b) (paragraph
5.2 (2)).
At this point verify that the VJ1000HP meter reading is correct; adjustment may be made
with trimer R6 situated in the directional coupler on the output of the low-pass filter, near the
antenna connector.
To gain access to it, remove the small protection cover.
8.4
Calibration of the PWR Meter (FWD)
Perform SETUP 2 (Fig.4).
1)
Connect a 50 Ohm 1.5KW dummy load in series with a bypass wattmeter (Byrd model
43), switch on the amplifier and verify the correct reading of the VJ1000HP’s meter.
2)
Adjust trimmer R9, situated inside the directional coupler on the output of the low-pass
filter, near the antenna connector.
3)
To gain access, remove the small protection cover.
N.B. The trimmer R2 connected in series with the meter allows small adjustments
after the calibration of PWR, REF and FWD, and is normally in a central position.
Summary of Contents for VJ1000HP
Page 1: ...Prodotto da Italia VJ1000HP User Manual...
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Page 20: ...VJ1000HP 14 40 USER MANUAL Rev 4 0 26 02 01 FIG 1...
Page 22: ...VJ1000HP 16 40 USER MANUAL Rev 4 0 26 02 01 FIG 2...
Page 24: ...VJ1000HP 18 40 USER MANUAL Rev 4 0 26 02 01 PHOTO 1 3 1 2 5 7 11 9 4 6 8 12 10...
Page 26: ...VJ1000HP 20 40 USER MANUAL Rev 4 0 26 02 01 PHOTO 2 1 2 3 4 5 6...
Page 28: ...VJ1000HP 22 40 USER MANUAL Rev 4 0 26 02 01 PHOTO 3 7 2 3 6 5 4 1...
Page 40: ...VJ1000HP 34 40 USER MANUAL Rev 4 0 26 02 01 SETUP 1 FIG 3...
Page 41: ...VJ1000HP 35 40 USER MANUAL Rev 4 0 26 02 01 SETUP 2 FIG 4...
Page 42: ...VJ1000HP 36 40 USER MANUAL Rev 4 0 26 02 01 SETUP 3 FIG 5...
Page 46: ...VJ1000HP 40 40 USER MANUAL Rev 4 0 26 02 01 This page intentionally left blank...
Page 47: ...VJ1000HP Flat Cable 1 2 Appendice Tecnica Rev 1 0 26 02 01...
Page 49: ...VJ1000HP Telemetry Cable 1 2 Appendice Tecnica Rev 1 1 26 02 01...
Page 51: ...VJ1000HP Power Supply 1 4 Appendice Tecnica Rev 1 0 25 05 02...
Page 52: ...VJ1000HP 2 4 Power Supply Technical Appendix Rev 1 1 20 05 02...
Page 55: ...VJ1000HP H T Rectifier Board 1 4 Appendice Tecnica Rev 1 0 26 02 01...
Page 56: ...VJ1000HP 2 4 H T Rectifier Board Technical Appendix Rev 1 0 26 02 01...
Page 59: ...VJ1000HP R F Block 1 ph 1 4 Appendice Tecnica Rev 1 0 26 02 01...
Page 68: ...VJ1000HP 2 4 Grid Plate Meter B Technical Appendix Rev 1 0 26 02 01...
Page 72: ...VJ1000HP 2 4 Low Pass Filter Technical Appendix Rev 1 0 26 02 01...
Page 75: ...VJ1000HP Input Matching Circuit 1 4 Appendice Tecnica Rev 1 0 26 02 01...
Page 76: ...VJ1000HP 2 4 Input Matching Circuit Technical Appendix Rev 1 0 26 02 01...
Page 80: ...VJ1000HP 2 4 Directional Coupler Technical Appendix Rev 1 0 26 02 01...
Page 83: ...VJ1000HP Telemetry Card opt 1 4 Appendice Tecnica Rev 1 0 26 02 01...