Motorola R-2001D Operator's Manual page 25

TABLE
2-1. CONTROLS, INDICATORS, AND CONNECTORS
ITEM DESCRIPTION
FRONT PANEL (figure 2-1)
FUNCTION
Ext Level control
1 KHz Level control
Mic connector
Ext Mod In connector
Mod Out connector
MONITOR section:
Volume control
BW switch
BFO control
Sig Lvi indicator
Squelch control
Image/Dplx
toggle switch
Demod Out connector
Potentiometer
Iswitch
PotentiometerIswitch
4-pin connector
Pre-emphasis and
IDC are used
BNC connector
BNC connector
Potentiometer
Two-position toggle
switch
PotentiometerIswitch
LED (red)
Potentiometer
Two-position switch
BNC connector
Controls modulation level of external input (microphone
and other external generators). Switch at fulJ counterclock-
wise position disables external modulation inputs.
Internal I KHz tone modulation level control. Switch at full
counterclockwise position disables I KHz modulation tone.
Microphone input. Provides microphone bias and PUSH
TO TALK (GENERATE) connection to equipment. Uses
RTM-4000 microphone or handset.
External modulation signal input.
Output connector for all modulation signals (all signals
combined).
Controls speaker output level.
In monitor mode, selects IF bandwidth. Wide BW is ± 100
KHz mod acceptance. Narrow BW is ± 5 KHz mod accep-
tance. In Gen, FM mode selects modulation range: 0-100
KHz deviation in WB or 0-25 KHz in NB.
BFO on/off and beat frequency control for sideband recep-
tion. To minimize interference, turn off the BFO when not
in use.
Squelch indicator.
Adjusts squelch threshold level, full counterclockwise posi-
tion disables squelch.
NOTE; Monitor sensitivity is greatly decreased (for high-
level use) as the control is increased clockwise beyond the
quieting point.
In duplex generation mode, controls the duplex frequency
output for above (High) or below (Low) the receive pro-
grammed frequency. In monitor mode it selects the fre-
quency of the local oscillator injection above or below the
programmed monitor frequency to remove image inter-
ference.
Receiver audio output.
2-7