CALLISTO Receiver Construction and Testing
Printed circuit board -
Top. All components have been mounted except the tuner. Layout is well-designed
with
separation of RF and IF components from digital, power and baseband components.
The coupling/impedance matching
transformers for 37.7 and 10.7 MHz IF are in the lower-right corner
Printed circuit board -
Bottom. All passive components (resistors, capacitors, inductors) are surface
mount devices.
One wire jumper was required to correct a mistake in the PCB layout (lower-left)
Completed receiver
showing the rear panel with input/output connectors. Included are antenna and
clock RF
connectors,
AGC adjustment potentiometer (black knob), dc power connector, video (audio)
connector, EIA-232
serial port
connector (DB-9F) and Focal Plan Unit connector (DB-25F). The front panel has an
On/Off switch and
power indicating LED
Interior view of completed receiver, ready for
testing. The silver module in the middle is the television tuner, which
includes RF input and down-conversion functions (see next image). The tuner is a Phillips
CD1316L/IVP-3 with
IEC (PAL) connectors
for RF input/RF output. The RF output connector on the tuner is not used. This module
is
designed for horizontal mounting and
is modified for vertical mounting. All coaxial cable is RG-316/U and all
RF
connections are crimped
Interior view of tuner that had to be replaced.
RF input is the compartment at the upper-right and RF
output (not used) is the compartment on the lower-right. The tuner is a
digitally controlled analog RF device.
Completed receiver on test bench for burn-in.
Receiver (left) on test bench with Callisto software running on lab PC (right)
