Yaesu Musen 20761X50 Scanning Receiver Instruction Manual

Yaesu Musen 20761X50 Scanning Receiver

IF SHIFT Operation

IF shift permit  moving the DSP  filter pass band higher or lower, without changing the pitch of the incoming signal, and thus reduces or eliminates interference. Because the tuned carrier frequency is not varied, there is no need to re-tune the operating frequency to eliminate the interference. The total passband tuning range for the IF SHIFT system is ±1.2 kHz.
Rotate the [SHIFT] knob to the left or right to re-duce the interference.

• The display will show the shift value of the IF SHIFT for 2 seconds whenever the [SHIFT] knob is turned.
• Press and hold the SHIFT knob to reset the IF SHIFT setting to “0 Hz”.

WIDTH Tuning
The IF WIDTH tuning system allows you to vary the width of the DSP IF passband, to reduce or eliminate interference.
Moreover, the bandwidth may actually be expand-ed from its default setting, should you wish to en-
on the band is low.
Rotate the [WIDTH] knob counter-clockwise to narrow the bandwidth and reduce interference.

• To increase the bandwidth, rotate the knob clockwise. The display will show the bandwidth of the IF SHIFT, while tuning the [WIDTH] knob.
• Press and hold the [SHIFT] knob to restore the WIDTH setting to factory default.

ATT (Attenuator)
When extremely strong local signals or high noise degrades reception, you can use the [ATT] button to insert 6, 12, or 18dB of RF attenuation in front of the RF amplifier.

1. Touch [ATT].
2. Touch desired attenuation level, per the chart below.

• If the noise level is high or the received signal is extremely strong, the incoming signal level can be suppressed with the IPO/ATT settings. If the S-meter fluctuates S-3 or more in the noise level, or the received signal is extremely strong and it causes a high Smeter indication
• Since IPO does not only attenuate the incoming signal, but also improves the cross modulation characteristic, try to activate the
  the ATT. In this way, you can attenuate the  incoming signal and noise effectively

IF NOTCH Filter Operation

The IF NOTCH filter is highly eggective system that allows cutting out an interfering beat note or other carrier signal from inside the receiver pass- band.

1. Rotate the [NOTCH] knob to adjust the “null”

Press and hold the [NOTCH] key to restore the IF NOTCH setting to the factory default.

To exit from IF NOTCH filter operation, press the INOTCH] key.

DNR Operation
-signed to reduce the level of random noise found on the HF and 50 MHz bands, and it is especially

1. Press the [DNR] key.
2. Press and hold the [DNR] key, then rotate the [FUNC] knob to set the noise reduction algo-rithms.
3. To exit from DNR operation, press the [DNR] key.

Noise Blanker (NB) Operation
The FTDX10 includes an effective IF Noise Blanker, which can significantly reduce noise caused by automotive ignition systems.

1. Press the [NB] key.
2. Press and hold the [NB] key, then rotate the [FUNC] knob to set the noise blanker level.
3. To end Noise Blanker operation, press the [NB] key once more.

Adjusting the Noise Attenuation

1. Press the [FUNC] knob.
2. Select [OPERATION SETTING]- [GENER- AL] [NB REJECTION].
3. Rotate the [FUNC] knob to set the noise at- attenuation (10dB/30dB/40dB).
4. Press the [FUNC] knob to save the new set- ting.

Transmission

1. Press the microphone PTT switch to begin transmitting.
2. Then touch the meter area on the display to select the “ALC” meter.
3. Close the PTT switch, and speak into the microphone in a normal voice level.

In the SSB mode
Adjust the MIC gain so that the ALC meter stays within the ALC zone of the meter on voice peaks.

In the AM mode
When transmitting in the AM mode, adjust the MIC gain so that the ALC meter does not de-

Changing the transmission meter

Touch the meter area and the meter selection screen will be displayed, so touch the desired meter.

TOT (Time Out Timer)

-mitter after continuously transmitting for the pro-grammed time.

1. Press the [FUNC] knob.
2. 3. Rotate the [FUNC] knob to select the TOT
3. Press the [FUNC] knob to save the new set-ting.

Speech Processor

The FTDX10 Speech Processor is designed to increase “talk power” by increasing the average power output (via a sophisticated compression technique.

1. Press the [FUNC] knob.
2. Touch [PROC]. Speech Processor feature is activated.
3. Then touch the meter area on the display to select the “COMP” meter.
4. Press the PTT switch on the microphone, and speak into the microphone in a normal voice level.
   • To adjust the Compression level:
   1. Press the [FUNC] knob.
   2. Touch [PROC LEVEL].
   3. Rotate the [FUNC] knob to adjust the Compression level.
5. To exit from the Speech Processor, press the [FUNC] knob, then touch [PROC].

Monitor

Use the Monitor feature to listen to the quality of your transmitted signal.

1. Press the [FUNC] knob.

2. Touch [MONI].
   Monitor feature is activated.

   • To adjust the Monitor level:
   1. Press the [FUNC] knob.
   2. Touch [MONI LEVEL].
   3. Rotate the [FUNC] knob to adjust the audio level.

3. To exit from MONITOR operation, press the [FUNC] knob, then touch [MONI].

VOX
-gage the transmitter automatically when you speak into the microphone.

1. Press the [VOX/MOX] key.
   VOX feature is activated.

2.  Without pressing the PTT switch, speak into the microphone in a normal voice level. When you start speaking, the transmitter should be activated automatically.
   When you finish speaking, the transceiver should return to the receive mode (after a short delay.

To cancel VOX and return to PTT operation, press the [VOX] key once more.

Adjusts the VOX GAIN

1. Press the [FUNC] knob.
2. Touch [VOX GAIN].
3. While speaking into the microphone, rotate the [FUNC] knob to the point where the transmitter is quickly activated by your voice, with-out background noise causing the transmitter to activate.

Adjusts the VOX Delay Time

1. Press the [FUNC] knob.
2. Touch [VOX DELAY]
3. Rotate the [FUNC] knob while saying a brief syllable like “Ah” and listening to the hang time for the desired delay.

Adjusts the sensitivity of the anti-trip

1. Press the [FUNC] knob.
2. Touch [ANTI VOX].
3. Rotate the [FUNC] knob to prevent receiver audio from activating the transmitter (via the microphone.)

Split-Frequency Operation

aity in Split Frequency operation using the VFO-A and VFO-B frequency registers. This makes the FTDX10 especially useful for high-level DX-pedi- tions. The Split operation capability is very ad-vanced and easy to use.

1. Set the VFO-A frequency as desired.
2. Press the [A/B] key.
3. Set the VFO-B frequency.
4. Press the [A/B] key.
5. Press the [SPLIT] key. During Split operation, the VFO-A register will be used for reception, while the VFO-B register will be used for transmission.
6. Press the [SPLIT] key once more, Split operation will be cancelled.
   During Split operation, pressing the [A/B] key will reverse the contents of VFO-A and VFO-B. Press the [A/B] key once more, to return to the original frequency alignment. operation.
   During Split operation, it is also possible to set VFO-A and

Quick Split Operation

The Quick Split feature allows you to set a one-

1. Set the VFO-A frequency.
2. Press and hold in the [SPLIT] key for one second to engage the Quick Split feature, and apply a frequency 5 kHz above the VFO-A frequency to the VFO-B frequency register.
   • The operating mode applied to the VFO-B register will be the same as that in use on the VFO-A register.

CW Mode Operation

The powerful CW operating capabilities of the FTDX10 permit operation using an electronic keyer paddle, a “straight key”, or a computer-based keying device.
Setup for Straight Key Operation

1. Before starting, connect your key line to the rear panel KEY jack.

2. Set the operating mode to CW.

3. Rotate the MAIN Dial knob to select the de-sired operating frequency.

4. Press the [FUNC] knob.

5. Touch [BK-IN].
   The Break-in will be set to “ON”.

6. Touch [MONI].
   The CW monitor is activated.

7. Operation using your CW key may now proceed.

CW Delay Time Setting
hang time of the transmitter, after you have finished sending, may be adjusted to a comfortable value consistent with your sending speed.

1. Press the [FUNC] knob.
2. Touch [BK-DELAY].
3. Start sending and rotate the [FUNC] knob to adjust the hang time, as you prefer for comfortable operation.
4. Press the [FUNC] knob to save the new setting.

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