Section 5. Operation; Rf Gain Control; Agc (Automatic Gain Control) - Kenwood TS-930S Instruction Manual

SECTION 5. OPERATION ]
5.1 Reception (I}
The numbers in parenthesis refer to switch and control
assignments as listed in the preceding chapter.
NOTE:.
Set the MIC and CAR controts to minimum to prevent accidental
transmission before tune-up. The TS-930S must be operated into
a 50 ohm antenna or dummy load with an SWR less than 2:1.
Random tength wire antennas or light-bulb dummy toads should
not be used. Conventional half-wave dipoles and beam antennas
should be used only at or neat' their resonant frequency. Ex-
ceeding an SWR of 1.5:1- can damage the output stags of the
transceiver.
{1} Basic Procedures for Receive Operation'
The TS-9305 has many advanced features such as CW,
VBT, SSB slope tuning, NOTCH, ete. to assure enhanced
receive operation. For the use of these specialized controls
and switches, refer to Section 5.2 Reception {I)''.
With a suitable antenna and microphone or key connected
to the transceiver, set the controls as described.
UNITIAL SETTING]
]
Controls Reception
| POWER switch OFF
VOX switch OFF
MONI switch OFF
STAND-BY switch REC
| SSB reception sLow
CW reception FAST
MODE Selected reception mode
MEMO switch VFO
a | FUNCTION A
§ [RF ATT 0 dB
2 [RIT OFF
€ | NOTCH OFF
AF TUNE OFF
D.LOCK OFF
AF control Tum fully counterclockwise
RF controt Tum fully clockwise
SSB slope tune High © Turn fully
clockwise
Low Tum fully
counterclockwise
gt 4
& & | RX ANT switch OFF
Table 5-1
». Tum the POWER switch (42) on. The meter and
frequency display group will light , indicating the
18-9308 is operating.
b. Select 4 band with the BAND switch (7) or 1 MHz step
switches (8).
© Advance the AF gain control {53) clockwise untit Some
receiver noise or signal is heard from thé speaker.
d. Adjust the main tunitig withiri the frequency range of
the selected Amateuf barid until a signal ig heard. Tune
the signal for clearest reception.
(2) WWV Reception
Set the band switch to "10" and turn the tuning con-
troi to 10.0 MHz. ° °
5.2 RECEPTION (11)
This section covers operation of controls and switches to
provide maximum performance from the TS-9308.
1sORF ATT switch
A strong adjacent signal tay conceal a desired weak
signal, or the S meter may deflect off-scale when the
receiver is tuned to a local strong signal. The input to the
RF amplifier may be attenuated by 10, 20 or 30 dB using
the RF ATT switch. This will reduce or eliminate in-
terference and distortion from excessively strong signals.
2 RF GAIN CONTROL
RF GAIN is controlled by changing the AGC threshold
voltage. Adjust the RF GAIN so the S-meter does not
deflect excessively. This also reduces noise during recep-
tion. For normal operation, this control should be turned
fully clockwise for maximum sensitivity.
| Meximum "5 metor reading of
| an incoming signal.
Poiria: doticetian with AF
clockwise
Fig. 5-1 RF GAIN Control Operation
3 AGC {AUTOMATIC GAIN CONTROL}
Set the AGC switch to the appropriate position: Generally
for SSB and AM, SLOW, for CW and FSK FAST, and for
very weak signals, the AGC may be turned OFF.