Olson Technology CAN - Manual (Page 14)

025-000570 Rev. X7 www.olsontech.com 14
LINK GAIN
The overall gain of the Advanced L-Band link is affected by the gain setting of the transmitter,
the gain setting of the receiver and the optical loss. Table 2 shows how the gain of the trans-
mitter and receiver can be set.
Table 2 - Transmitter and Receiver Gain Settings
S1
Setting
S2
Setting
Tx or Rx
Gain
S1
Setting
S2
Setting
Tx or Rx
Gain
0 Lo 0dB 0 Hi 10dB
1 Lo 1dB 1 Hi 11dB
2 Lo 2dB 2 Hi 12dB
3 Lo 3dB 3 Hi 13dB
4 Lo 4dB 4 Hi 14dB
5 Lo 5dB 5 Hi 15dB
6 Lo 6dB 6 Hi 16dB
7 Lo 7dB 7 Hi 17dB
8 Lo 8dB 8 Hi 18dB
9 Lo 9dB 9 Hi 19dB
A Lo 10dB A Hi 20dB
B Lo 11dB B Hi 21dB
C Lo 12dB C Hi 22dB
D Lo 13dB D Hi 23dB
E Lo 14dB E Hi 24dB
F Lo 15dB F Hi 25dB
Figure 10 shows how the overall gain of the Advanced L-Band link varies as the transmitter
and receiver gain and optical loss vary. For simplification, the horizontal axis shows the total
of the transmitter and receiver gain. The RF gain changes 2dB for each 1dB of optical loss.
The curves shown in Figure 10 are for a normal sensitivity, PIN-based receiver. The curves in
Figure 10 will all shift upward about 7dB to 20dB when a high-sensitivity APD-based receiver
is used. The variation depends on the receiver optical input level. See Figure 19 for more de-
tails.