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bandwidth on a given band at a given time
may not be on another band at another time.
See Figure 4-6 for some initial settings for
various microphones. Remember results
Input
Source
Heil
Goldline
Ten-Tec
708A Mic
Sound
Card
Interface
Sound
Card
Interface
SETTING UP ORION II FOR AM
TRANSMIT
The same factors that affect SSB transmit
also come into play for AM transmit
operation as well. Speech processor, low
end rolloff, TX bandwidth, mic gain, and TX
EQ are all used for AM operation as well.
Transmit bandwidth for AM operation is fixed
at 6 kHz.
Carrier amplitude for AM operation is set
automatically by ORION II. The PWR
control on the front is used for PEP output
power setting in AM operation. A value of
100 would correspond to 100 watts PEP AM
output, or 25 watts carrier power maximum.
FSK OPERATION
Selection of the FSK mode will allow the
ORION II to operate true FSK RTTY. The
FSK circuitry is controlled through the rear
AUX I/O jack on the rear panel of the
transceiver.
Pin 7 on the I/O jack is the MARK/SPACE
input. This input is typically connected to
the FSK output on a modem or terminal
unit. The ORION II receives FSK using
lower sideband. The center of the filter
passband is preset so any bandwidth filter
used will be centered on the standard FSK
MARK/SPACE 2125/2295 Hz tones.
566 manual
Part #74410
Printed in USA
Input
Device
MODE
MIC
SSB
MIC
SSB
AUX
PSK31
AUX
MFSK
Figure 4-6 Initial Suggested Microphone Settings
Version 4 – October 2006
will vary, and these are just suggested
starting points.
MIC
AUX
Gain
Gain
65
zero
-6 dB
60
zero
0 dB
zero
75
-14 dB
zero
55
0 dB
The ORION II display indicates the transmit
MARK frequency. There is also a user
control called FSK Tx Data in the Other
menu for selecting whether the MARK is the
low tone or high tone (the standard is low
tone). This allows the transceiver to be
used with either TTL or open-collector
keying schemes.
The monitor function is available in FSK
mode and may be used to monitor the
transmitted tones. (See (18) MON in
Chapter 2).
TRANSVERTER HOOKUPS
ORION II provides the ability for a VHF
transverter to be connected to the rear panel
via the XVRT KEY, XVRT RF, and AUX RX
jacks on the transceiver rear panel.
Both the XVRT KEY and XVRT RF
transverter support connections are
activated via the TX menu. Enter the TX
MENU (see description under TX MENU in
Chapter 3), and use the MULTI knob to turn
the transverter output on. This will activate
both the XVRT KEY jack and send RF
output through the XVRT RF jack.
TX
EQ
42
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