HP 70301A, Инструкция по установке и проверке, Страница: 14 / 60

RF
The RF LED indicates that the HP 70301A T rac king Generator RF OUTPUT p o w er is on.
That is, the LED is lit when the SR C PWR ON/OFF softkey is ON .
UNLEVELED
The UNLEVELED LED indicates that the RF OUTPUT p o w er is unlev eled during the time
the LED is lit. An y of the follo wing can cause unlev eled p o w er:
Source p o w er (SR C PWR) is set to o high.
The EXT detector (ALC EXT) is selected with no external detector connected to the fron t
panel EXT ALC INPUT.
RF c hain malfunctions causing low output p o w er.
10 MHz-2.9 GHz IN
The signal applied to this SMA (f ) connector is from the HP 70300A RF tracking generator.
The signal is routed to the HP 70301A RF OUTPUT during low-band op eration.
EXT ALC INPUT
The signal applied to this BNC (f ) connector is the external lev eling signal when an external
detector is pro viding automatic lev el con trol.
RF OUTPUT
The signal a v ailable at this T yp e N (f ) connector is the HP 70301A RF output.
Module Latch
The mo dule latch secures the mo dule in a mainframe. An 8 mm hex-ball driv er (shipp ed with
the mainframe) ts the mo dule hex-n ut latch. Chapter 2 pro vides instructions for installation
and remov al of a mo dule.
Rear-P anel Features
3.6-6.6 GHz LO IN
The signal applied to this SMA (f ) connector is the lo cal oscillator signal, whic h comes from
the RF section LO OUT. The signal passes through an isolator and a lev eling amplier to the
mixer in the YTO phase-lo c k lo op circuit.
3.6-6.6 GHz LO OUT
The signal a v ailable at this SMA (f ) connector is the LO IN signal after it has passed through
a lev eling amplier.
300 MHz IN
The signal applied to this SMB (m) connector is the 300 MHz reference from the lo cal
oscillator mo dule.
1-4 General Information