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3.1 FRONT PANEL
The symbol after the part name indicates:
@: Active only during reception.
@: Active only during transmission.
No symbol: Always active
1. NOTCH TNDTCATOR LED @
This indicator, (light emitting diode). illuminates when the
NOTCH circuit is tumed ON.
2. VFO INDICATOR
The VFO indicator illuminates when the internal VFO con-
trols transceiver operation. The indicator is not lighted
during fixed channel or remote VFO operation.
3. PROC (SPEECH PROCESSOR) TNDTCATOR O
This indicator, (light emitting diode), illuminates when the
PROC switch is turned ON.
4. RF ATT TNDTCATOR @
This illuminates when the RF ATT is turned ON.
s. cAL swrTcH (R)
This switch energizes the built-in marker circuit.
Receive frequency can be calibrated at 25 kHz intervals
using this oscillator.
6. METER
The meter monitors five different functions, depending on
METER switch position. In receive the meter is automati-
cally an S-meter, and shows received signal strength on a
scale of O to 4O dB over 59. In transmit, meter function
depends on the position of the METER switch, as de-
scribed below. This is an average-responding meter, NOT
peak.reading.
7. VOXSWTTCH O
The VOX circuit is readied for voice operated transmit in
SSB or semi-break-in CW.
8. VOX GA|N O
This controls sensitivity of the VOX (Voice Operated
Transmit) circuit.
9. NB SWTTCH @
With the push switch lN, the noise blanker circuit turned
ON reducing pulse-type (ignition) noise. Power-line, radat
QRM and atmospheric
"white"
noises will not operate the
blanker. The noise blanker circuit operating level is adjus-
table by the noise blanker control.
1 0 . N B L E V E L C O N T R O L @
This control adjusts the noise blanker circuit operation
level according to recoiving conditions or noise level.
11. AGC SWTTCH @
This controls the AGC (Automatic Gain Control) circuit:
O F F . . . . . . . . . . . . . . A G C d i s a b l e d ( n o A G C ) .
FAST ........... Normally used for CW operation.
SlOW.......... Normally used for SSB operation.
12. METER SWITCH
Thb determines the transmit meter function:
ALC (Automatic Level Control)
Monitors intemal ALC voltage, or the ALC voltage
fuedback from a linear amplifier operated in conjunc-
tion with the TS-53O. For SSB operation the ALC
reading for voice peaks should be within the indicat-
ed ALC range. ALC voltage adjustment is made with
the MIC control for SSB and with the CAR control for
cw.
lP (Plate Current)
In this position th€ mster monitors final tube plate
current. The scale is calibrated from O to 350 ma.
RF (Output Power)
This monitors relative output power of the trans-
ceiver. There is no meter scale for this position. Nor-
mally the reading should be adjusted (with the RF
METER control)for a 2/3 scale reading.
HV (High Vohage)
This position monitors the high voltage pq,ver suf
ply. The meter scale is calibrabd from O to 10, indi-
catingOto lOOOvohs.
13. STAND-BYSWITCHC)
This two-position lever switch selects:
REC......'.'..... The transceiver is receiving unless the mi-
crophone PTT switch, or the VOX circuit is
activatd.
SEND .'...'....' Locks the unit in transmit.
14. VOXDEIAYCONTROLO
The DELAY control adjusts the hold time for VOX or
break-in CW operation. Adjust for individual preference.
15. CARLEVELCONTROLC)
This controls canier level during CW operation. Adjust the
CAR level so that the ALC meter points to the center of the
ALC zone. The ALC meter should not read beyond the ALC
zone.
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