Speech Processor (Ssb/Am); Changing Frequency While Transmitting; Transmit Monitor - Kenwood TS-870S Instruction Manual

Intelligent digital enhanced communications system
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7 OPERATING AIDS

SPEECH PROCESSOR (SSB/AM)

The speech processor functions by leveling the large
fluctuations in your voice when you speak. This leveling
action effectively raises the average transmit output
power resulting in a more understandable signal when
operating using SSB or AM. You will notice that using
the speech processor makes it easier to be heard by
distant stations.
1 Select SSB or AM mode.
2 Select the preferred processor characteristics via
Menu No. 25 (PROC.LOW) and Menu No. 26
(PROC.HI).
You can customize the low and high ranges of
the speech envelope from –6 to +6 dB.
Lower
dB +6
+3
Low
0
range
-3
-6
800 Hz
3 Press [PROC] to switch ON the processor.
"PROC" lights.
AGC
AUTO
USB
4 Press [METER] to select the COMP function.
5 While speaking at your normal voice level, adjust the
PROC control for a level of 10 dB or less.
Using higher compression will not improve your
signal clarity or apparent signal strength.
Excessively compressed signals are more
difficult to understand due to distortion and are
less pleasant to hear than signals with less
compression.
PROC
MONI
4
6
8
2
0
1 0
COMP
6 Press [METER] to select the ALC function.
7 The compression level affects the ALC setting for
SSB; therefore, while continuing to speak into the
microphone, adjust the CAR control for a reading
within the ALC zone.
Keep the meter inside the ALC zone for the
cleanest transmit signal and to avoid interfering
with other stations on adjacent frequencies.
46
Raise
High
range
1.6 kHz
PROC
7
9
VOX
FULL
SEMI
AIP
AGC
S
M.CH
50
ATT
PWR
FILTER
ANT
DOWN
UP
SWR
3
COMP
AUTO
LSB
USB
CW
VOX
FULL/SEMI
AIP
HF TRANSCEIVER
TS-870
ON AIR
METER
PROC
MONI
AT TUNE
THRU/AUTO
1
CH 1
6
M.IN
AGC
KEY SPEED
PROC
MONI
ENTER
SEND
4
6
2
CH 2
7
M>VFO
2
8
3
CH 3
8
SCAN
PHONES
SLOW
FAST
4
CH 4
9
CLR
OFF
0
1 0
CAR
DELAY
MIC
PWR
MIC
4
6
4
6
5
REC
0
F.LOCK
2
8
2
8
QUICK MEMO
FINE
0
1 0
0
1 0
M.IN
MR
8 Press [METER] to select the COMP function to allow
you to monitor the compression while transmitting.
9 To switch OFF the processor, press [PROC] again.
"PROC" goes out.
Input audio that is controlled by the AGC will be clipped.
Note:
Therefore, when mixing audio with the operator's voice, lower the
gain control as necessary.
MIC

CHANGING FREQUENCY WHILE TRANSMITTING

Moving your frequency while transmitting is usually an
unwise practice due to the risk of interference to other
stations. While transmitting, if you select a frequency
outside the transmit frequency range, the transceiver is
automatically forced to receive mode. If transmit was
selected using the [SEND] key, transmission will not be
resumed until you select a frequency inside the transmit
frequency range, and you transmit again.

TRANSMIT MONITOR

The Transmit Monitor function allows you to hear your
own transmitted signal.
Mode
SSB
Unmixed AF
CW
Keyed output from DSP with sidetone OFF
FSK
AF corresponding to the shift and mark/space
AM
Unmixed AF
FM
Unmixed AF
Press [MONI] to toggle the Monitor function ON or OFF.
To change the volume of the monitored audio,
AUTO
PROC
MONI
R
FSK
FM
AM
adjust the MONI control.
AT TUNE
TF-SET
1MHz
Transmit Sampling Point
AGC
AUTO
MONI
USB

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