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Installation
3-2
1705A Spectrum Monitor
L BAND
INPUT
LNB POWER
ON
LNB POWER
OFF
+18 VDC @ 250 mA
ON
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.
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
2 --- 3
Graticule lights enabled
(factory set)
Graticule lights disabled
Mechanical Installation
NOTE. Cabinet drawings are provided for installation information only, and are
not to scale. All dimensions are in inches.
Operating Options
Cabinet Options