Icom IC-746 Instruction Manual

41
5
FUNCTIONS FOR RECEIVE
5-10 Twin PBT
[TWIN PBT]
M1
AGCDUPCMPTCNSCP
Twin PBT graphic indication
interference
inteference
interference
desired signal
desired signal
pass band
IF center frequency
center
passband
passband
IF center freq.
IF shift
The PBT function electronically narrows the receiver’s
IF passband widths to reduce interference. Moving
both [TWIN PBT] controls to the same position shifts
the IF.
➥ Rotate the [TWIN PBT] controls to adjust this func-
tion. See the illustration below.
• [TWIN PBT] should normally be set to the center posi-
tions when there is no interference.
• When PBT is used, the audio tone may change.
• PBT may not function with some IF filter combinations.
• Not available in FM mode.
PBT OPERATING EXAMPLE

Icom IC-746 Specifications

General

Mode	SSB, CW, RTTY, AM, FM
Receiver Type	Double conversion superheterodyne
Antenna Connector	SO-239
Voltage	13.8 V DC ±15%
Impedance	50 ohms
Output Power	100 W (SSB, CW, FM, RTTY), 40 W (AM)
Current Drain	TX: 20 A
Sensitivity	AM: 2 µV
Selectivity	CW: 500 Hz (-6 dB)