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SPECIFICATION
TEST SETUP
Inband IMD
Configure the two-tone test set to produce a lowpass
filtered 16.208/16.2085 MHz two-tone with each tone at
(-55 dB typ.
-16 dBm (-10 dBm PEP). Third order products and
-50 dB max.)
harmonics must be less than -80 dBm.
Connect the two-tone to the receiver RF input.
Receive frequency 16.207 MHz, USB,
AGC=SLOW, preamp OFF.
Send a status request command to the receiver and note
the received signal level. Add 10 to the signal level, and
set the Manual Gain (Attenuation) to this number.
Connect the audio spectrum analyzer to the MONO
AUDIO output.
Analyzer settings:
Adjust Display Reference to place each main tone at -6
dB.
Third order products should be:
Turn attenuator ON
Each main tone should drop to:
LO Phase Noise
Connect a 16.208 MHz / 15 dBm crystal oscillator thru
@ 20 kHz offset
10 dB and 1 dB step attenuators to RF in.
Connect audio analyzer to MONO AUDIO output.
Receive frequency 16.227 MHz, USB, preamp OFF.
Set attenuator to 80 dB
(120 dB/Hz typ.
MAGC = 20.
-110 dB/Hz max.)
Note audio noise level in dBm.
Decrease attenuator setting for a 10 dB rise in noise
level.
Attenuator setting should be:
Important Note: 10-dB rise above typical receiver noise floor of -122 dBm/3.2 kHz is -147 dBm/Hz. Subtract
RF input level from this to obtain dBc/Hz phase noise. Phase noise of the xtal oscillator or signal generator
used must be at least 20 dB better than the expected measurement.
Blocking
AM Mode, 6 kHz BW.
ON Tune
Receive frequency 15.01 MHz, preamp OFF.
Connect signal generator to RF input.
Set signal generator to 15.01 MHz, 30% AM!
(<5% THD:
1 kHz, -6 dBm
0 dBm input
MAGC =0.
30% AM 1 kHz)
AGC Mode = Slow.
Set audio analyzer to read % distortion.
Distortion should be less than:
1250 Hz CF
30 Hz RBW
10 Hz VBW
200 Hz/div
0 dBm Input Level
20 dBm Log Reference
1 sec/div Scan Time
6-4
TYP.
MIN/MAX
-55 dB
-50 dB max.
-20 dB
+/- 3dB
42 dB
52 dB MAX
2.5%
5% MAX
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