of demodulated carrier (250Hz
ref) at RF J3
10 kHz
-1 to +1 dB(r)
(-0.1)
1 kHz
-1 to +1 dB(r)
(-0.1)
50 Hz
-1.5 to +1.5 dB(r)
(+0.8)
31.5 Hz
-5 to -1 db(r)
(-3.1)
-35 dBu, 250 Hz, low distortion, sinusoidal signal in at audio input rig
Measure Phase responce of
demodulated carrier at RF J3
20 kHz
(-54)
10 kHz
(+152)
400 Hz
(-160)
50 Hz
(-168)
Low gain High gain deviation. Audio signal distortion, Frequency response measurement, LF rolloff pot taper &
Phase measurement (high gain branch)
Prerequisite(s) Unit in set-up mode
Note
Entering Set-up mode is not necessary if the Alternate Method is exercised.
DUT in "Passthru"
FREQ set to middle frequency
LF filter set to "LF 35"
Using the test panel key pad navigate to the "Gain" screen
Press DWN button to change audio level to "Gain 15 "
level=15 (changes audio level to 15)
(15)
Gainsw set to Low gain
gainsw=2 (sets codec gain swith setting to X1 branch)
-35 dBu, 250 Hz, low distortion, sinusoidal signal in at audio input rig
Note
Neither audio board LED (D5 nor D6) are red (limiter not activated)
Measure deviation at the
10.0 to 12.0kHz of
(11)
