Ten-Tec OMNI-VII Скачать руководство пользователя страница 31

588 manual

Second release – August 2007

31

Part #74409
Printed in USA

The two most-used SSB transmit controls
will be mic gain (accessible from the
MIC/MON button on the front panel) and the
speech processor (accessible from the
SP/VOX button on the front panel).

Mic gain is set by pressing the MIC button
and talking into the microphone. When you
have reached proper ALC, the red ALC LED
located next to the S-meter on the front of
the radio will flash on voice peaks. Adjust
the mic gain upward until the ALC light is
flashing on and off while you are
transmitting. Different microphones will
require more or less gain.

To account for differences in microphones
used with OMNI-VII, a hardware mic gain
control is also provided. This control is
accessible via an access hole at the front
bottom of the transceiver, near the mic jack
at the junction of the molded front panel and
metal bottom cover. This hardware mic gain
control is before the microphone input
amplifier. A simplistic description of the
signal path input would be: microphone >
hardware mic gain potentiometer >
microphone amp > A/D converter > DSP.
The software mic gain control adjusted with
the MULTI knob is at the DSP level.

The hardware mic gain control is set to
maximum as supplied from the factory to
accommodate proper level for Ten-Tec
microphones. Should your non-Ten-Tec
microphone of choice be subject to easy
overdriving, the hardware mic gain can be
reduced. Please note that the hardware mic
gain pot at full CLOCKWISE is at minimum,
and full COUNTER-CLOCKWISE is
maximum. This is as seen with the
transceiver upside down and a tool inserted,
not as if the transceiver is right side up and
facing you.

Speech processing (SP) is provided to give
the operator more “punch” to the transmitted
signal. Speech processing increases the
average amplitude relative to the peaks for
an increase in average power transmitted.
Press the SP button (if desired) and use the
MULTI knob to adjust the speech processing
level. Speech processing is generally not
used for higher-fidelity SSB audio; its use is
primarily for added intelligibility for
communications-grade SSB audio. It is also
possible with high levels of speech
processing and combinations of microphone

and other settings available to send the
transmitter into distorted SSB output. Use
the monitor function to listen to what you are
transmitting and avoid this.

The speech processor used in the OMNI-VII
is a DSP generated RF compressor.
Human voices have peak-to-average ratios
as high as 15 dB. At 100 watts PEP output,
the average output power might be as little
as 3 watts! RF compression raises the
average output power and tends to improve
intelligibility by bringing out subtle parts of
speech. With a digitally generated RF
speech processor, we have the advantage
of calculating the RF envelope before
modulation is performed.

Note on wide SSB transmit bandwidths:
Audio fidelity generally improves with the
use of wider SSB transmit filtering. Using a
3.0 kHz or higher bandwidth will have a
more “well-rounded” audio response than a
narrower bandwidth. As transmit bandwidth
widens, so does the potential for
interference with stations using adjacent
frequencies.

Part 97 of the FCC regulations governing
amateur radio operation does not specify a
maximum transmit bandwidth usable by
amateurs for SSB communication.
However, FCC regulation 97.307(a) requires
amateur stations not to occupy more
bandwidth than is necessary for the
emission type being transmitted in
accordance with good amateur practice.
Regulation 97.307(b) requires that
emissions outside the necessary bandwidth
must not cause splatter interference to
operations on adjacent frequencies.

While these are broad regulations subject to
interpretation, the responsibility for
complying with the regulations rests with the
operator. Using an SSB transmit bandwidth
wider than necessary for communications
and causing interference to adjacent
stations while doing so is specifically what
these regulations are addressing. In
summary, what may be an acceptable
bandwidth on a given band at a given time
may not be on another band at another time.

Содержание OMNI-VII

Страница 1: ...8 6 AF RF ENCODER 8 7 MIC 8 8 TUNE 10 9 PWR 10 10 11 V M and M V 10 12 MODE 10 13 STEP 11 14 ANT 11 15 SWP 11 16 AGC 12 17 BAND CHANGE AND DIRECT FREQUENCY ENTRY KEYPAD 12 18 A B A B SPL REV 12 19 MAI...

Страница 2: ...OTE F3 24 REMOTE ENC 24 POD ENC RATE 24 VFO ENC RATE 25 RIT ENC RATE 25 VFO SPDSHIFT 25 DISPLAY 25 SPEECH PROC 25 I F FILTER 25 ENABLE 300 HZ ENABLE 500 HZ 26 Section 5 OPERATION NOTES AND ACCESSORY C...

Страница 3: ...USA MASTER RESET 33 UPDATING OMNI VII FIRMWARE 33 DIAGNOSTIC AND IP DATA ENTRY SCREEN 34 SIGN ON THE SCREEN 34 TROUBLESHOOTING 35 Section 6 SPECIFICATIONS AND TECHNICAL DATA GENERAL 37 RECEIVER 37 TR...

Страница 4: ...ams are not included in this manual but are available for download from the www rfsquared com firmware website This manual was written by Scott E Robbins W4PA Qty Part Description 1 27074 Mini ATC Bla...

Страница 5: ...a given spacing are present for test purposes General coverage HF transceivers today are of an upconverting VHF level first I F followed by two or three more conversion stages This VHF I F first stage...

Страница 6: ...ia the serial RS 232 port on the rear panel The transceiver then can be controlled by the user from the local PC from the front panel controls or both REMOTE STATE is when the transceiver is placed in...

Страница 7: ...ms load will be useable with the transceiver Headphones above 16 ohms like 32 can be used without damage to the transceiver but audio output to the headphones may be reduced When headphones are plugge...

Страница 8: ...alue A green LED indicator is next to the BW and PBT legends on the front of the radio above the encoder Press the encoder to switch between BW and PBT The BW control is used to set the value of the D...

Страница 9: ...an electret condenser requiring a polarizing voltage Chassis ground and mic signal ground are separated to reduce the possibility of introducing stray hum or RFI into the transmit audio signal We reco...

Страница 10: ...reamp is on or off and FM CTCSS tone in use If you want to exit the memory save function above WITHOUT saving the memory to a location instead of pressing V M the second time to save the memory press...

Страница 11: ...transmitting via ANT 1 or ANT 2 depending on which is selected When AUX RX is in use on receive switching back and forth between ANT 1 and ANT 2 for transmit requires the AUX RX antenna be turned off...

Страница 12: ...ain VFO using the keypad To direct enter a frequency press ENT The main display will change to a series of green dashed lines Enter the frequency using the numbers and decimal point If entering a freq...

Страница 13: ...itting In CW modes the TX and ALC LED s will blink on and off with each character transmitted In LSB and USB modes the TX LED will be lit as long as the radio is in transmit The ALC light is used to a...

Страница 14: ...ning the MULTI knob while speaking into the microphone The red ALC LED will flash When the light is flashing consistently on voice peaks the proper mic gain level has been set There is some variabilit...

Страница 15: ...e done while holding the SPOT button down to hear the tone or the spot volume as it tracks The alternate function of this button is sidetone volume S T Press ALT then S T Turn the MULTI knob to adjust...

Страница 16: ...audio sleeve is ground Requirements for an external speaker connected to OMNI VII is minimum 4 watts power handling 4 ohms minimum impedance 31 ACC 1 Figure 3 1 ACC 1 jack pin out diagram The ACC 1 j...

Страница 17: ...re update site at www rfsquared com Brief instructions on firmware updating your transceiver are provided in UPDATING OMNI VII FIRMWARE in Section 5 35 AMP KEY OMNI VII is equipped with an open collec...

Страница 18: ...el Use no less than 14 gauge 12 recommended stranded wires for three foot long connections to accommodate the high current demand during transmit Use heavier gauge wire for longer power supply leads 4...

Страница 19: ...ther ANT 1 or ANT 2 being used as the transmit antenna Antennas are selected using the ANT front panel button See the description of 14 ANT in Section 2 of this manual The automatic antenna tuner opti...

Страница 20: ...ter can be disabled by changing this line item to OFF SSB TX BW Available settings 1000 4000 Hz in 200 Hz steps The SSB TX BW control determines the bandwidth of a transmitted SSB signal It is selecta...

Страница 21: ...splayed FM TX CTCSS is active in FM mode only If a value is selected and the radio is in any other mode this line item is ignored by the transceiver and the tone will not be transmitted There is no CT...

Страница 22: ...ndividual transmitted CW characters A setting of 0 is full break in CW A delay of 100 is approximately a 1 second recovery time before receive audio is restored Please note that this control is not us...

Страница 23: ...0 watts output Each band is calibrated in production This sets the required DSP output The CW waveform is generated in DSP and uses a raised cosine for the attack and decay The level of the DSP wavefo...

Страница 24: ...es the function of the front panel REV button See 18 A B A B SPL REV in Section 2 A B duplicates the function of the front panel A B button See 18 A B A B SPL REV in Section 2 A B duplicates the funct...

Страница 25: ...nsity of the backlighting on the display screen Lower values are darker lighting higher values are brighter lighting At 0 the screen lettering is almost unreadable on a dark background At 100 the scre...

Страница 26: ...An installed optional 500 Hz or 300 Hz filter can be disengaged by selecting NO For example if the optional 500 Hz filter is installed ENABLE 500 Hz is set to NO and I F FILTER is set to AUTO when tu...

Страница 27: ...user changes bands and does not hit tune before transmitting the tuner is in bypass mode and SWR is that of the antenna connected The automatic antenna tuner will operate on either ANT 1 or ANT 2 dep...

Страница 28: ...initial linear amplifier tune up If an automatic antenna tuner is installed in your OMNI VII go into the menu and disable it with the AUTO TUNER line item Pressing the TUNE button will provide approxi...

Страница 29: ...nd fine but no signal will be on the frequency you re listening to Worse perhaps would be not only is no desired signal present but that loud signal and other ones near it might even be throwing spuri...

Страница 30: ...c gain control that is accessible under the front of the bottom panel Transmit bandwidth is both the frequency response of the transmitted signal and the amount of spectrum occupied by that signal Typ...

Страница 31: ...ing level Speech processing is generally not used for higher fidelity SSB audio its use is primarily for added intelligibility for communications grade SSB audio It is also possible with high levels o...

Страница 32: ...ing the power switch or your 13 8 Vdc power source OVER TEMP OMNI VII uses an internal temperature gauge on the final amplifier If the temperature exceeds 70 degrees C this message will appear on the...

Страница 33: ...s equipped with a drag control To adjust the drag on the main tuning knob hold the silver skirt still while rotating the knob about a quarter turn There will be a gentle click feel as the knob is loos...

Страница 34: ...KEY WAS PRESSED will appear along with hexadecimal information on the right side of the screen Encoder function can be tested by turning the encoders Each encoder 5 of them including the main tuning k...

Страница 35: ...essor An excessively high setting can reduce audio quality A frequent cause of a distorted SSB signal is inadequate RF grounding resulting in RF feedback Common RF grounding problems are no ground con...

Страница 36: ...nsmitting for a minimum of one minute See ON SCREEN STATUS MESSAGING elsewhere in this manual Problem No operation in VOX Is VOX highlighted at the bottom of the screen If not VOX is turned off Check...

Страница 37: ...ccupied bandwidth Display STN transmissive color LCD display with CFL backlight 320 x 240 pixels PC control ports Serial EIA 232 standard DB 9F Integrated 10 mb s Ethernet CAT5 or CAT6 RJ 45 Supply Vo...

Страница 38: ...eadphones Usable at 8 ohms AUX Audio Output 500 mv RX Notch Filter IF DSP 50 dB depth adjustable width Auto Notch IF DSP multi tone adjustable RX Noise Reduction IF DSP adjustable Noise Blanker IF DSP...

Страница 39: ...FM Deviation 5 kHz peak nominal Current Drain 25 A max 100 W output Figure 6 1 OMNI VII Block Diagram 455 Filters 5 54MHz 1st Mix 2nd Mix R R T T T R T R TX Filters R T 70MHz 125MHz 69 545MHz 3rd Mix...

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