Cross Technologies 1200-03, Instruction Manual

Page: 10 / 11

2.4.2 AGC voltage relating to Gain - The 1200-03 IF Processor operates over a 0 to -80 dBm input range
on the RX IF side. The Automatic Gain Control (AGC) provides a constant -35 dBm ± 10 dBm output RX IF
level over the entire input range. Pin 7 of the DB9 control connector, J105, can be monitored to determine
the approximate input level (and corresponding gain) in AGC as Table 2.2 shows.
TABLE 2.2 - Approximate AGC Vooltage vs Gain and Input Level TABLE 2.2 - Approximate AGC V oltage vs Gain and Input Leevel TABLE 2.2 - Approximate AGC Voltage vs Gain and Input L evel
AGC Voltage (pin 7, J105) AGC Gain Input Level
+0.3 VDC -35 dB 0 dBm
+0.1 VDC -25 dB -10 dBm
-0.7 VDC -15 dB -20 dBm
-1.4 VDC -5 dB -30 dBm
-1.8 VDC +5 dB -40 dBm
-2.1 VDC +15 dB -50 dBm
-2.3 VDC +25 dB -60 dBm
-2.5 VDC +35 dB -70 dBm
-2.7 VDC +45 dB -80 dBm
1200-03 Manual, Rev. B Page 10 01/08/09