Installation

LNB POWER

ON

L BAND

LNB POWER

INPUT

 

 

ON

 

OFF

 

+18 VDC @ 250 mA

Figure 3-1: L-BAND INPUT connector and controls

Under extreme LNB load conditions it is possible for the +18 V supply to load the main 1705A power supply enough to change the low line regulation. Under these circumstances the power supply may go out of regulation when mains voltage falls below 100 V.

Operating Options The 1705A provides an internal jumper setting to enable or disable the graticule lights. See Table 3-1.

Table 3- 1: Internal Jumper Selection

Jumper

Name

Position

Function

 

 

 

 

A3A1 J100

Light Enable

1---2

Graticule lights enabled

 

 

 

(factory set)

 

 

2---3

Graticule lights disabled

 

 

 

 

Mechanical Installation

Cabinet Options

NOTE. Cabinet drawings are provided for installation information only, and are not to scale. All dimensions are in inches.

3- 2

1705A Spectrum Monitor

Page 65
Image 65
Tektronix 1705A instruction manual Mechanical Installation, Cabinet Options, LNB Power Band Input OFF