Sea Tel USAT, Quick Start Manual

Field Service Procedure – Replacement Pol Pot Kit, USAT 

Page

6

of

7

Document No 

135929 Rev A

Copyright © Sea Tel, Inc 2012 - The information contained in this document is proprietary to Sea 
Tel, Inc.  This document may not be reproduced or distributed in any form without prior written 

consent of Sea Tel, Inc.  

*Note:

A

level

bubble

or

spirit

level

can

be

placed

on

the

LNB

to

verify

the

accuracy

of

its

alignment.

(Fig:

1.1)

7.

If

the

LNB

isn’t

horizontal

at

the

central

position

of

the

pots

range

(120

counts)

the

LNB

will

then

need

to

be

physically

driven

until

it

is

aligned

horizontally

and

then

adjustments

will

need

to

be

made

to

the

position

of

the

pol

pot

to

calibrate

it

for

a

value

of

120

counts.

To

drive

the

LNB

to

horizontal

enter

drive

commands

into

the

remote

command

screen

of

the

DAC

to

rotate

the

feed

assembly

by

issuing

drive

to

the

pol

motor:

For

example

if

the

LNB

is

over

to

the

left

of

center

and

needs

to

be

driven

clockwise

to

bring

it

to

horizontal

increase

the

pol

value.

Enter

“g0130”,

“g0135”,

g0137”

and

so

on

into

the

remote

command

screen

until

the

LNB

is

aligned

horizontally.

Should

the

LNB

be

over

to

the

right

of

center

and

needs

to

be

driven

counter

‐

clockwise

to

bring

it

to

horizontal

decrease

the

pol

value.

Enter

“g0110”,

“g0105”,

g0103”

and

so

on

into

the

remote

command

screen

until

the

LNB

is

aligned

horizontally.

8.

Once

the

LNB

has

been

aligned

horizontally

(as

per

Fig

1.1)

locate

the

pol

pot

on

the

feed

assembly

and

loosen

the

retaining

screw

using

a

9/64”

Allen

wrench

(as

shown

below

in

Fig.

1.2).

Slide

the

pol

pots

bracket

towards

the

feed

assembly

to

slacken

the

belt

tension

and

allow

the

pol

pot’s

pulley

to

be

rotated

(as

shown

below

in

Fig.

1.3).

Adjust

the

pol

pot

as

necessary:

If

the

LNB

is

to

the

left

of

center

(needs

to

be

rotated

clockwise

to

bring

it

to

level)

rotate

the

pulley

counter

‐

clockwise.

If

the

LNB

is

to

the

right

of

center

(needs

to

be

rotated

counter

‐

clockwise

to

bring

it

to

level)

rotate

the

pulley

clockwise.

(Fig.

1.2)

(Fig.

1.3)

9.

Resend

the

remote

command

“g0120”

to

re

‐

center

the

feed,

you

may

find

it

easier

to

drive

the

feed

away

from

its

central

position

and

then

back

to

center

(I.e.

send

the

command

“g0130”

followed

by

“g0120”).