Nautel ND2000A-02x-xx0 Series, Technical Instructions

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500 WATT RADIOBEACON TRANSMITTER
ND2000A-02x-xx0
Page 5-29
15 January 2005
Table 5-2 Functional Test Check List (Continued)
PARA FUNCTION OBSERVED TEST RESULTS TOLERANCES
5.3.12 (l) Modulation
Depth A______% B______% 60% of intended modulation
(A3E Mode) depth
(o)
Modulation Depth A______% B______% 35% of intended modulation
(Tone-A3E Mode) depth
5.3.13 (h) Identification Code
Accept Reject Assigned Indent
(j) Frame Length A______ B______ 5 to 16 seconds
5.3.14
(i) Stby code '1' Accept Reject See 'Established References’
(l) Stby code '2' Accept Reject See 'Established References'
5.3.15.2 (c)
Carrier Fault Threshold A______ B______ See 'Established References'
(c) Set Threshold Lamp Accept Reject Lamp flashing on and off
(Within limits)
(c) Set Threshold Lamp Accept Reject Lamp turns on and remains on
(Threshold exceeded)
5.3.15.3 (k)
Modulation Fault A______ B______ No less than -1 dB greater
Threshold Level than carrier threshold level
(k) Set Threshold Lamp Accept Reject Lamp flashing on and off
(Within limits)
(k) Set Threshold Lamp Accept Reject Lamp turns on and remains on
(Threshold exceeded)
5.3.15.4 (k)
Changeover/Shutdown Accept Reject See 'Established References'
(Loss of keying) (20 to 80 seconds)
(x)
Changeover/Shutdown Accept Reject See 'Established References'
(Low carrier level) (20 to 80 seconds)
(am)
Changeover/Shutdown Accept Reject See 'Established References'
(Low modulation depth) (20 to 80 seconds)
5.3.16
(i) SWR Cutback Threshold Accept Reject Between 50 and 60 watts
(w) SWR Cutback Threshold Accept Reject No increase in forward pwr
5.3.17 (i) Overmod
Threshold Accept Reject Specified lamp on
(100% Modulation)