Table of Contents
Advertisement
Quick Links
hupRF
hupRF Panoramic Adaptor Installation – IC718
These instruction cover installation of the PAT board in the 1st IF of the ICOM IC718 –
64.455MHz – this gives access to all receiver options on the main receiver.
Although the rig uses separate mixers in the Rx and Tx paths, the 1
common to both directions. The connections shown here pick up the output of the filter after
the diode switch, so significant Tx signal should not be present. However, it is recommended
that PAT is powered from the R8V line, which will automatically mute it on transmit.
Basic instructions are given for installing the PAT as an IF Panoramic Adaptor Tap – used in this
mode your SDR must be tuned to the 1
tuning of your rig – however, the displayed frequency will be that of the IF, not the radio.
Because the connection point on the IC718 is after the IF filter, the bandwidth available to
display is restricted by the filter.
PAT Install 718
st
IF of the radio, and then your display will track the
In the block diagram to the left, the PAT
input signal will be picked up just before
D401, the second mixer.
There are no convenient test points
provided by ICOM, so the signal and
power must be picked up directly from the
Main circuit PCB.
The PAT output can be brought out by
either a socket mounted in one of the
ventilation slots of the rear panel, or by a
flying lead with a free plug on the end –
this latter method is easier.
The circuit diagram to the left shows the
pick up point for the PAT input and the
connection point for the Vcc power,
taken from the R8V line. In practice,
this measures about 6.9V on Rx and 0V
on Tx.
© 2016
st
IF filter (FL301B) is
10 Sept 2016
Advertisement
Table of Contents
Summary of Contents for hupRF PAT
- Page 1 PAT is powered from the R8V line, which will automatically mute it on transmit. Basic instructions are given for installing the PAT as an IF Panoramic Adaptor Tap – used in this mode your SDR must be tuned to the 1 IF of the radio, and then your display will track the tuning of your rig –...
- Page 2 © 2016 Build and test the PAT kit – use a 9v supply and you should measure a gain of approx 1dB at 70MHz. Remove top, bottom and inside top covers from the IC718 As stated above, the output can either be by a socket mounted in the vent slot or by a flying lead.
- Page 3 The black wire in Fig 3 is the PAT input signal, whilst the red wire in Fig 4 is the power, taken from the R8V line.
- Page 4 The output connection from PAT to the rear panel will need approx 100mm of RG178A miniature coax. If the PAT is mounted as shown in the pictures, the path is quite short and direct. If you use a flying lead output, it is recommended that you use a small cable tie to secure the lead as it exits the rear panel –...
- Page 5 Strip the dielectric to reveal the inner. • Fig 7 shows a prepared ned of the RG178 cable ready for installing in the IC718; other examples may be seen in the other instruction sheets posted. PAT Install 718 10 Sept 2016...
- Page 6 3.5mm 3.5mm Table 1 – Cable stripping details for IC718 installation Fig 7 – Cable termination preparation details Extracts from the ICOM IC718 Service Manual are acknowledged as the copyright of the ICOM Corporation. PAT Install 718 10 Sept 2016...
Need help?
Do you have a question about the PAT and is the answer not in the manual?
Questions and answers