General Radio Settings; Signalink Controls And Indicators; Special Jumpers - Tigertronics SignaLink USB Installation & Operation Manual

- GENERAL RADIO SETTINGS -

Virtually all digital modes require that you TURN OFF any
Speech Processing or Compression features in your radio.
This is to insure RF linearity. You must also TURN OFF
your VOX circuit when using the SignaLink. As mentioned
in the audio level setting procedure, you can usually use
your radio s USB mode for digital operation (LSB for some
bands). However, if the SignaLink USB is connected to a
Data or Accessory Port, then you may need to select a
special mode such as Data , User , D-USB or D-LSB
(to name a few). If you are not sure which mode to use,
then consult your radio manual.

- SIGNALINK CONTROLS AND INDICATORS -

Power Switch
This turns power OFF to the SignaLink
USB s Transmit and Receive circuits, but it does not power
down the built-in sound card. The SignaLink USB s sound
card will power down with the computer automatically
when the computer is shutdown, or put into suspend
mode. When you are not using the SignaLink, we suggest
that you turn it OFF.
Power LED
This LED will be ON when the computer is
powered up and the SignaLink s
depressed. If the computer enters suspend mode and
shuts off power to the USB port, then this LED will turn
OFF even if the SignaLink s Power switch is turned ON.
PTT LED
This LED is ON only when the SignaLink
USB is transmitting.
TX Control
This control adjusts the Transmit Audio level
going to the radio, which directly affects the radio s RF
power output level. Turn this control clockwise for more
power, and counter-clockwise for less.
RX Control
This control adjusts the Receive Audio level
(sometimes called Waterfall Drive ) going into the
computer. Turn this control clockwise for more audio and
counter-clockwise for less.
DLY Control
This control adjusts the Transmit Hang
Time for the SignaLink USB s Auto-PTT
the control set to minimum (fully counter-clockwise), the
radio will remain keyed for approximately 15 milliseconds
after Transmit Audio has stopped. This setting is suitable
for modes that require fast turn-around times like Packet. It
is also the best position for many other digital modes like
PSK-31 and MT63. A longer delay of up to 4 seconds can
be selected by turning the control clock-wise. A delay of
approximately two seconds is adequate for most Voice
modes such as EchoLink. For slow AFSK CW, you will
probably want to set the Hang Time delay to between 500
ms and 1 second.
Power switch is
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circuit. With
6

- SPECIAL JUMPERS -

The SignaLink has three jumpers that can be installed to
provide higher Transmit and Receive Audio levels, and
increase the unit s PTT sensitivity.
described below and their location is shown in Figure 4.
JP2
This jumper can be installed to increase the Receive
Audio signal going into the SignaLink USB s built-in sound
card.
JP3
This jumper can be installed to increase the
SignaLink USB s Transmit Audio Signal. With this jumper
installed, the SignaLink USB can provide up to 2Vp-p into
600 ohms. This should be more than adequate to drive any
radio to full power. Note that this is NOT needed for most
radios.
JP4
This jumper can be installed to increase the
sensitivity of the SignaLink USB s Auto-PTT
approximately two times. This is not necessary for Data
modes, but does offer increased performance for voice
applications.
Figure 4 Location of jumpers JP2, JP3 and JP4.
- VISIT US ON THE INTERNET -
If you have Internet access, please visit our web site at:
http://www.tigertronics.com
Our site contains the latest news about Tigertronics
products, support information, and other information of
interest to all Hams and SWLs. This is also the best source
for downloadable programs that work with our products.
We also have all of our distribution software and
documentation available for download as well. The site is
updated often, so stop in on a regular basis and get the latest
news and updates.
These jumpers are
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circuit