"Mimick the forward path losses"? Huh????
Why would the return network need to realize losses of the actives internal forward network? The return signal is being distributed from that leg back through the network. Unlike the the forward signal that has to be regulated by the DC-8, to balance its value in regards to its fixed originating output, to accomplish the desired downstream inputs. The return signal is being injected at various locations, through various passives, with the modem having variable output capability to accomodate all of this, allowing its signal to hit the first amplifier with as low an output as possible.
By padding the input to the return chip, you are merely adding additional attenuation the sending modem must overcome in order to hit the level it needs to provide to the return amplifier in that active.
Driving the modem output higher than would otherwise be necessary. Increasing noise to the first Return amp.
I can see no reason to pad the input to the return, in order to immulate internal forward losses.
As to padding fwd input to make output. S/A has variable multi/amps for various design needs. "Given the appropriate amplifier" and ONLY in this consideration, will the desired input levels be met by the input pad necessary for the desired output.
Just shoving pads to make output is baaaaaaaaad advice cowboys.
;)
>Splicer life is correct.
>Also be aware of the return input pad requirements for the GM Duals. You must pad the return input to match any internal DC value used on the forward output. For example: If an internal DC-8 is used, the return input tap leg needs to have an 8 pad installed and the thru leg a 2 or 3 pad. This procedure mimicks the forward path losses on the return path. It is very important to do this. If no DC or two way is used, 0 pads are installed.
>In our design procedure, we will also "adjust" the return input pad value incremently until we have optimized each leg for optimum output levels at the various return devices. This really helps a customer at the end of a long distribution line.
>If anyone would like additional information, feel free to contact me.
>
>
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>>pad just the input for the desired output and go. these gainmakers are the nicest equipment i have worked with to date. GREAT amps!
>>
>>>We are having a problem with setting up the forward levels
>
Re:870MHz S-A need answers
Member #: 6620
Registered: 1996-2001
Posted:
134
Name:
Mike O'Conner
Name:
Mike O'Conner
Company:
Sweep Specialties
Occupation:
Sweep Tech, low voltage contractor
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