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Page 4-52
GNS 400W Series Maintenance Manual
Rev. A
190-00356-05
Deflection Balance
When the receiver has been adjusted to produce a course deviation output standard deflection
(0.093 ddm produces 90 millivolt NAV +LEFT output voltage) with a -53 dBm Standard
Localizer Deviation Test Signal, 90 Hz greater than 150 Hz, the deviation of opposite polarity
obtained when the signal is modulated with 150 Hz greater than 90 Hz must be within 8% (7.2
millivolts) of the standard deflection as tested in HOT and COLD environments, and must be
within 4% (3.6 millivolts) of the standard deflection as tested at AMBIENT.
Measure NAV +LEFT J6-5 with respect to NAV +RIGHT J6-6.
Harmonic Distortion
With a -53 dBm signal amplitude modulated 30% at 1 kHz, the total harmonic distortion
measured at the NAV AUDIO HI J6-16 and NAV AUDIO LO J6-17 outputs must be less than
5%.
