Operating Instructions
2-4 1705A Spectrum Monitor
11. HORIZONTAL
A variable controlthat positions the tracehorizontally (X axis).
12. VERTICAL
A variable controlthat positions the display vertically(Y axis).
13. POWER
Switches the instrumentbetween a powered up state and standby. Portions
of the Power Supply circuitboard have mains potential on them in either
state. A mechanical indicato r in the center of the switch shows the stat us of
the POWER switch.
WARNING.Mains power is still applied to the 1705A Power Supply circuit board,
regardlessof POWER switch state. To totally remove shock hazard, it is
necessaryto unplug the instrument and wait for the capacitors to discharge.
Rear- Panel Connectors
Signal input and power input arelocated on the 1705A rear panel. See Fig-
ure 2-2 for the locationsof the rear-panel connectors.
1. L--BAND
A75input f-type connector used for the 900 --2000 MHz input of L--Band
rf, which is down convertedby a Low-Noise Amplifier/Block Down
Converter (LNB) fromthe received s atellitesignal.
2. LNB POWER(Switch)
Switch to turn on or offthe +18 V supply on the L--BAND INPUT connec-
tor. Supply is normally used to power a Low-Noise Amplifier/Block Down
Converter at the antenna.

POSITION

POWER

INPUTS