Tx Offset Switch; Squelch; Rit And Rit Switch; Nb (Noise Blanker) - Kenwood TR-9000 Instruction Manual

4. If you desire to hold the frequency at which the scan
stops, press the HOLD button or press the microphone
PTT switch ON momentarily. Scan will be released and
the transceiver will return to normal operation.
5. Scan speed is about 120mS for each channel. When the
scan button is continously depressed, scan speed is
doubled.
6. In the auto scan operation, it may be better to use FM1
mode (10kHz step) in crowded FM areas.
7. Effective auto scan operation cannot be obtained with
100Hz step FM (FM2, DS OFF).
• Free scan
1. In SSB or CW mode, press the SCAN button and the
transceiver will operate in a free scan mode. Auto scan
is not possible in SSB/CW mode.
2. When the SCAN button is pressed with DS ON (search
operation), your SSB frequency is scanned automatical-
ly.
3. For free scan operation in FM mode, set the squelch
control to the F.S. position and press the SCAN button.
Scanning will not stop when a signal is present.
4. To stop the scan, press the HOLD button or the
microphone PTT switch, as for auto scan. The
transceiver will return to normal operation.
• Scan Operation Precautions
1. During scan operation, including temporary scan stop,
the frequency can not be changed by the VFO or the
microphone UP/DWN switches. To change frequency, it
is first necessary to release the scan by pressing the
HOLD button or MIC PTT switch.
2. If the MR switch is pressed during scan operation, the
memory frequency is output. When this switch is releas-
ed, scanning will not resume.
3.6 TX OFFSET SWITCH
The TX OFFSET switch, used for selecting simplex or
repeater operation, has three positions.
If the transmitter frequency is shifted beyond the high or
low frequency limits, the transceiver will operate in simplex
mode, and a warning tone wild sound during transmit.
*: The transmitter frequency is 600 kHz higher than the
receiver frequency.
CD: The TR-9000 operates in the usual simplex mode. That
is, receive and transmit frequencies are the same.
This frequency is indicated on the digital frequency
display (1 5).
e: The transmitter frequency is -600 kHz lower than the
reciever frequency.
NOTE:
OFFSET is available for all modes.
3.7 SQUELCH
The squelch circuit operates only in the FM mode.
To eliminate the noise at no-signal condition turn the
squelch slowly clockwise until the noise disappears and the
BUSY lamp goes off (threshold point).
Adjust the VFO to an empty frequency. The BUSY lamp
will light and the speaker will operate when a signal is
received. The squelch control is also used for auto scan
operation control.
If the signal is weak or fades during mobile operation, read-
just the squelch for the clearest reception.
3.8 RIT AND RIT SWITCH
"RIT" is an abbreviation for "receiver incremental tuning".
The RIT feature enables you to shift receive frequency ap-
proximately ± 1 kHz. By adjusting the RIT control in the
" + " direction, the receive frequency will be higher than
the transmit frequency (and vice versa).
When the RIT control is set to the center "0" position, the
frequency is the same as that at RIT OFF, and the frequen-
cy indicated on the digital display remains unchanged.
If the receive frequency is incorrect, it can be adjusted by
turning the RIT switch ON (the RIT lamp will light). Since
the receive frequency can be varied without changing the
transmit frequency, there is a difference between the
transmit and receive frequencies. Therefore, the RIT
switch should be turned OFF when the QSO is finished.
Note that the RIT circuit is available in SSB or CW mode
and does not operate in FM1 or FM2 modes.
3.9 NB (NOISE BLANKER)
The noise blanker is used to reduce ignition type impulse
noise generated from a car, and allows reception of weak
CW or SSB signals. The noise blanker will not operate in the
FM modes.
3.10 RF GAIN AND S METER
The RF GAIN control, which is used to control receiver,
gain has a range of more than 60dB in SSB or CW mode.
Since the RF GAIN function is interlocked with the AGC, it
is used to control strong signals. Receiver gain is maximum
at full clockwise position, and is reduced by adjusting the
control cournterclockwise.
In SSB mode, receiver noise can be reduced by using the RF
GAIN control. Adjust as necessary, according to signal
conditions. Normally, it should be set for maximum gain.
In FM mode, the RF GAIN has a range of about 20dB. It is
not interlocked with the S meter.
• FM mode
The lower 0-10 division linear
scale of the S meter is used. Full
scale occurs at 1 5µV.
• SSB/CW mode The upper scale of the S meter is
used.
The meter reads S-9 at 5µV in-
put and full scale at 1 mV.
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