CALAMP WIRELESS NETWORKS INC. BDD4T881S2 ユーザーズマニュアル

Paragon-III  Technical Manual

1.  Apply the following settings to the IFR COM-120:

a)  Generator mode, Output T/R, TX frequency to match the main radio RX frequency
b)  Filter set to wide band (no audio filter)
c)  Select Gen2 (Modulating tone fixed to 1KHz). All other Gen must be off.
d)  Set deviation to 

±

3.0KHz for full channel or 

±

1.5KHz for half channel radios.

e)  Use a X1 scope probe connected to the IFR SINAD input and monitor the Discriminator O/P on the

radio backplane at SK1 pin 6 (RX-audio1). Alternately, it is also possible to monitor at the receiver
I/O Pad P207 (T885), the receiver TP314 (T855).

2.  Lower the RF level to get a 12dB SINAD reading. Level should be better than -108dBm (including ca-

ble loss).

3.  Offset the IFR TX frequency 2kHz (full channel) or 1kHz (half / NPSPAC channel) above the main

radio RX frequency, record the SINAD reading. It should remain within 1.5 dB from the on frequency
SINAD reading. For T885 and T855, use above values.

4.  Offset the IFR TX frequency 2KHz (full channel) or 1kHz (half / NPSPAC channel) below the main

radio RX frequency, record the SINAD reading. It should remain within 1.5 dB from the on-frequency
SINAD reading. For T885 and T855, use above values.