User's Manual

ADCP-75-158 • Issue 1 • July 2003 • Section 4: Operation

Page 4-17

2.9 Enter Host Forward and Reverse Delay

The forward and reverse delay function allows entry of from 0 to 63 µsec of delay in the

forward and reverse paths. This feature is used when multiple systems are used to transport the

same channel and there is a significant difference in the path delay between systems. Additional

delay may be entered to balance the overall system delay. The amount of delay required must be

calculated by the RF engineer and should be included in the system design plan. The default

setting is 0 µsec. Use the following procedure to change the forward and reverse path delay:

1. Click on the HOST RF tab. The HOST RF display will open within the EMS main

window as shown in Figure 4-14.

Figure 4-14. HOST RF Display

Table 4-2. Reverse Path Attenuation Settings and Nominal Gain Provided

ATTENUATION

SETTING

GAIN

PROVIDED

ATTENUATION

SETTING

GAIN

PROVIDED

ATTENUATION

SETTING

GAIN

PROVIDED

0 dB → 30 dB 11 dB → 19 dB 22 dB → 8 dB

1 dB 29 dB 12 dB 18 dB 23 dB 7 dB

2 dB 28 dB 13 dB 17 dB 24 dB 6 dB

3 dB 27 dB 14 dB 16 dB 25 dB 5 dB

4 dB 26 dB 15 dB 15 dB 26 dB 4 dB

5 dB 25 dB 16 dB 14 dB 27 dB 3 dB

6 dB 24 dB 17 dB 13 dB 28 dB 2 dB

7 dB 23 dB 18 dB 12 dB 29 dB 1 dB

8 dB 22 dB 19 dB 11 dB 30 dB 0 dB

9 dB 21 dB 20 dB 10 dB 31 dB –1 dB

10 dB 20 dB 21 dB 9 dB -- --

Right-click here to

open the Host Fwd

Delay pop-up screen

Right-click here to

open the Host Rev

Delay pop-up screen

Right-click here to

open the Host Div Rev

Delay pop-up screen