RFL Electronics IMUX 2000 - Page 598

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL VF-6I RFL Electronics Inc.
December 15, 2011 22 (973) 334-3100
ATTENUATOR SETTINGS
The RFL VF-6I module has two attenuators: Transmit and Receive. Factory settings for these
attenuators are 3.0 dB on the transmit side and 3.0 dB on the receive side. This allows -16 dBm in, +7
dBm out with 3 dB of headroom.
Table 4 is an extended list of attenuator calibration settings. Set the attenuators based on the desired
input and output levels listed in the table. These settings will permit a maximum signal level 3 dBm
higher than the indicated level. For example, with -10 dBm input, the transmitter attenuator setting
would be 9 dB and the maximum line input would be -7 dBm. Using these settings on the transmit side
will place a signal of 1 digital mW into the transmission bit stream.
Table 4. Attenuator calibration settings, RFL VF-6I Four Wire Orderwire Voice Frequency Module
Transmit
Level In
Transmit Attenuator
Setting
Receive
Level Out
Receive Attenuator
Setting
+5 dBm 24 dB -14 dBm 24 dB
+4 dBm 23 dB -13 dBm 23 dB
+3 dBm 22 dB -12 dBm 22 dB
+2 dBm 21 dB -11 dBm 21 dB
+1 dBm 20 dB -10 dBm 20 dB
0 dBm
19 dB
(1)
-9 dBm 19 dB
-1 dBm 18 dB -8 dBm 18 dB
-2 dBm 17 dB -7 dBm 17 dB
-3 dBm 16 dB -6 dBm 16 dB
-4 dBm 15 dB -5 dBm 15 dB
-5 dBm 14 dB -4 dBm 14 dB
-6 dBm 13 dB -3 dBm 13 dB
-7 dBm 12 dB -2 dBm 12 dB
-8 dBm 11 dB -1 dBm 11 dB
-9 dBm 10 dB 0 dBm
10 dB
(1)
-10 dBm 9 dB +1 dBm 9 dB
-11 dBm 8 dB +2 dBm 8 dB
-12 dBm 7 dB +3 dBm 7 dB
-13 dBm 6 dB +4 dBm 6 dB
-14 dBm 5 dB +5 dBm 5 dB
-15 dBm 4 dB +6 dBm 4 dB
-16 dBm 3 dB
(2)
+7 dBm
3 dB
(2)
-17 dBm 2 dB +8 dBm 2 dB
-18 dBm 1 dB +9 dBm 1 dB
-19 dBm 0 dB +10 dBm 0 dB
NOTES: (1) = Settings for 0 dBm in and 0 dBm out.
(2) = Settings for -16 dBm in and +7 dBm out.