Anritsu 682XXB, 683XXB 2-26 682XXB/683XXB MM

ters. PIN switch drive current is generated by inter-
nal drivers that are controlled by signals received
from the A12 Analog Instruction PCB. The switched
low-pass filters provide rejection of unwanted har-
monics. The 0.5 to 2.2 GHz RF signal has four filter-
ing paths—700 MHz, 1000 MHz, 1400 MHz, and
2200 MHz. After routing through the appropriate
filter path, the 0.5 to 2.2 GHz RF signal goes to con-
nector J2. Aportion of the down converter ’sRF out-
put signal is detected, amplified, and coupled out for
use in internal leveling. The detected RF sample is
routed to the A10 ALC PCB.
The 0.5 to 2.2 GHz RF output from the down con-
verter goes to input connector J1 of the switched fil-
ter assembly.There, the 0.5 to 2.2 GHz RF signal is
multiplexed into the switched filter’s output path.
Switched
Doubler
Module
The switched doubler module (SDM), found in
>20 GHz models, is used to double the fundamental
frequencies of 10 to 20 GHz to produce RF output
frequencies of 20 to 40 GHz.
26.5 GHz Models
The RF signal from the switched filter assembly is
input to the SDM at J1. During CW or swept fre-
quency operations in the 20 to 26.5 GHz frequency
range, the 10 to 13.25 GHz RF signal input is routed
by PIN switches to the doubler/amplifier.PIN
switch drive current is provided by the A9 PIN Con-
trol PCB and bias voltage for the doubler/amplifier
is supplied by the A14 SDM Driver PCB. The RF
signal is amplified, then doubled in frequency.From
the doubler,the 20 to 26.5 GHz RF signal goes to
the bandpass filter.After passing through the band-
pass filter,the 20 to 26.5 GHz RF signal is multi-
plexed by the PIN switches to the SDM output at
connector J2. RF signals input to the SDM of
£20 GHz are multiplexed through by the PIN
switches to output connector J2.
40 GHz Models
The RF signal from the switched filter assembly is
input to the SDM at J1. During CW or swept fre-
quency operations in the 20 to 40 GHz frequency
range, the 10 to 20 GHz RF signal input is routed by
PIN switches to the doubler/amplifiers. PIN switch
drive current is provided by the A9 PIN Control
PCB and bias voltage for the doubler/amplifiers is
supplied by the A14 SDM, SQM Driver PCB. The
2-26 682XXB/683XXB MM
FUNCTIONAL RF DECK
DESCRIPTION ASSEMBLIES