CALAMP WIRELESS NETWORKS INC. BDD4T83-2 사용자 설명서

-  Caution: mis-adjusting RSSI may reduce the Paragon

PD

's Parallel Decode (PD) performance.

-  BDLC

PD

 must be connected to the radio backplane during this process.

1.  T885-xx-0200 (800/900 MHz) and T855-xx-0250 (UHF) receivers:

-  Apply an on-channel signal from the RF generator at a level of -110 dBm modulated by a 1 kHz tone at

a deviation of ±3kHz (full channel) or ±1.5kHz (half / NPSPAC channel).

-  Adjust RV 345 (RSSI level) for T885, RV320 (RSSI level) for T855 to give 2.0V RSSI output at

SK330 pin 2 (T855) or on backplane SK1 pin 5 when measured with a voltmeter (See Figure 24 for test
point location).

2.   T835-xx-0200 (VHF) receivers:

- 

Apply an on-channel signal from the RF generator at a level of -100 dBm with deviation of ±3kHz
(full channel) or ±1.5kHz (half channel) at 1kHz tone.

- 

Adjust RV320 (RSSI level) to give 4.5V RSSI output at RSSI test point (near quad. Coil L360) or on
backplane SK1 pin 5 when measured with a voltmeter (Figure 24 - T800-50-0001) for test point loca-
tion).

The following RSSI graphics are given as general information only.
Refer to factory technical support only if RX data performance degradation is noticed combined with
something that does not look like those RSSI curves.