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HCL oct
3.1
FRONT
PANEL
CONTROLS
(See Figure 5)
METER
(1 on Figure 5)
The meter monitors five different functions, depending on
the position of the METER
switch.
In receive the meter
is automatically
an S-meter.
The S-meter
shows received
signal strength on a scale of 0 to 40 db over S9.
In transmit
the meter
function
depends
on the position
of the METER
switch, as described below.
METER
SWITCH
(2 on Figure 5)
The position of the METER
switch determines the function
of the meter.
The switch
selects one
of the following
functions '(see Table 5 for nominal meter readings) :
ALC
(Automatic
Level
Control)
—
In this position .the
meter monitors the ALC voltage of the internal ALC
circuit
(or the ALC voltage feedback
from a linear
amplifier operated in conjunction with the TS-900).
For SSB operation the ALC reading for voice peaks
should be within the indicated ALC segment of the
meter.
IP
(Plate Current) — In this position the meter monitors
the plate current of the final tubes.
The meter scale
is calibrated from 0 to 600 ma.
RF
(Output Power) — In this position the meter monitors
relative output
power
of the transceiver.
There is
no meter scale for this position.
HV
(High Voltage) — In this position the meter monitors
the high voltage from the power supply.
The meter
scale
is calibrated
from
6 to 10, indicating 600 to
1000 volts.
CAL (Calibrator) SWITCH
(3 on Figure 5)
The TS-900 contains a built-in crystal calibrator for calibrat-
ing the dial.
The CAL switch selects either a 25 KHz ora
100 KHz calibrator, or turns the calibrator off.
RF LAMP (AGC)
(4 on Figure 5)
This lamp is lighted when the RF AGC circuit is operating.
The light shows when a strong signal is operating adjacent
to the receiving frequency.
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RIT LAMP
(5 on Figure 5)
T. MUTE
LAMP
(6 on Figure 5)
STAND-BY SWITCH
(7 on Figure 5)
NB SWITCH
(8 on
Figure 5)
RIT SWITCH
(9 on Figure 5)
This two
position lever switch turns the RIT
(Receiver
Incremental
Tuning)
circuit on
and off.
With
the switch
flipped up the circuit is activated and the RIT lamp is lighted.
The
RIT/XTAL
control
can then
adjust the receiver fre-
quency independently of the transmit frequency.
FIXED CHANNEL
SELECTOR
SWITCH
(10 on Figure 5)
This two position lever switch selects between two different
fixed frequency channels which can be installed inside the
transceiver.
Fixed frequency
operation is convenient for
operation
on
often
used frequencies.
The fixed channel
oscillator replaces the VFO
when
the RIT/XTAL
control
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